feat: add support for feature attributes in struct literal

Signed-off-by: Benjamin Coenen <[email protected]>

11 files changed, 7182 insertions, 7969 deletions

diff --git a/crates/ra_syntax/src/algo.rs b/crates/ra_syntax/src/algo.rs
index 8d1098036..7f87f4212 100644
--- a/crates/ra_syntax/src/algo.rs
+++ b/crates/ra_syntax/src/algo.rs
@@ -7,7 +7,7 @@ use std::{
 
 use itertools::Itertools;
 use ra_text_edit::TextEditBuilder;
-use rustc_hash::{FxHashMap, FxHashSet};
+use rustc_hash::FxHashMap;
 
 use crate::{
     AstNode, Direction, NodeOrToken, SyntaxElement, SyntaxNode, SyntaxNodePtr, SyntaxToken,
@@ -72,8 +72,18 @@ pub fn find_covering_element(root: &SyntaxNode, range: TextRange) -> SyntaxEleme
 }
 
 pub fn least_common_ancestor(u: &SyntaxNode, v: &SyntaxNode) -> Option<SyntaxNode> {
-    let u_ancestors = u.ancestors().collect::<FxHashSet<SyntaxNode>>();
-    v.ancestors().find(|it| u_ancestors.contains(it))
+    if u == v {
+        return Some(u.clone());
+    }
+
+    let u_depth = u.ancestors().count();
+    let v_depth = v.ancestors().count();
+    let keep = u_depth.min(v_depth);
+
+    let u_candidates = u.ancestors().skip(u_depth - keep);
+    let v_canidates = v.ancestors().skip(v_depth - keep);
+    let (res, _) = u_candidates.zip(v_canidates).find(|(x, y)| x == y)?;
+    Some(res)
 }
 
 pub fn neighbor<T: AstNode>(me: &T, direction: Direction) -> Option<T> {
diff --git a/crates/ra_syntax/src/ast.rs b/crates/ra_syntax/src/ast.rs
index ab0f44dd2..a42eec91a 100644
--- a/crates/ra_syntax/src/ast.rs
+++ b/crates/ra_syntax/src/ast.rs
@@ -21,7 +21,7 @@ pub use self::{
         AttrKind, FieldKind, PathSegmentKind, SelfParamKind, SlicePatComponents, StructKind,
         TypeBoundKind, VisibilityKind,
     },
-    generated::*,
+    generated::{nodes::*, tokens::*},
     tokens::*,
     traits::*,
 };
@@ -64,6 +64,22 @@ pub trait AstToken {
     }
 }
 
+mod support {
+    use super::{AstChildren, AstNode, AstToken, SyntaxNode};
+
+    pub(super) fn child<N: AstNode>(parent: &SyntaxNode) -> Option<N> {
+        parent.children().find_map(N::cast)
+    }
+
+    pub(super) fn children<N: AstNode>(parent: &SyntaxNode) -> AstChildren<N> {
+        AstChildren::new(parent)
+    }
+
+    pub(super) fn token<T: AstToken>(parent: &SyntaxNode) -> Option<T> {
+        parent.children_with_tokens().filter_map(|it| it.into_token()).find_map(T::cast)
+    }
+}
+
 /// An iterator over `SyntaxNode` children of a particular AST type.
 #[derive(Debug, Clone)]
 pub struct AstChildren<N> {
@@ -271,7 +287,7 @@ where
     let pred = predicates.next().unwrap();
     let mut bounds = pred.type_bound_list().unwrap().bounds();
 
-    assert_eq!("'a", pred.lifetime_token().unwrap().text());
+    assert_eq!("'a", pred.lifetime().unwrap().text());
 
     assert_bound("'b", bounds.next());
     assert_bound("'c", bounds.next());
diff --git a/crates/ra_syntax/src/ast/edit.rs b/crates/ra_syntax/src/ast/edit.rs
index b69cae234..d79310995 100644
--- a/crates/ra_syntax/src/ast/edit.rs
+++ b/crates/ra_syntax/src/ast/edit.rs
@@ -99,7 +99,7 @@ impl ast::ItemList {
             None => match self.l_curly() {
                 Some(it) => (
                     "    ".to_string() + &leading_indent(self.syntax()).unwrap_or_default(),
-                    InsertPosition::After(it),
+                    InsertPosition::After(it.syntax().clone().into()),
                 ),
                 None => return self.clone(),
             },
@@ -109,10 +109,6 @@ impl ast::ItemList {
             [ws.ws().into(), item.syntax().clone().into()].into();
         self.insert_children(position, to_insert)
     }
-
-    fn l_curly(&self) -> Option<SyntaxElement> {
-        self.syntax().children_with_tokens().find(|it| it.kind() == T!['{'])
-    }
 }
 
 impl ast::RecordFieldList {
@@ -147,7 +143,7 @@ impl ast::RecordFieldList {
         macro_rules! after_l_curly {
             () => {{
                 let anchor = match self.l_curly() {
-                    Some(it) => it,
+                    Some(it) => it.syntax().clone().into(),
                     None => return self.clone(),
                 };
                 InsertPosition::After(anchor)
@@ -189,24 +185,20 @@ impl ast::RecordFieldList {
 
         self.insert_children(position, to_insert)
     }
-
-    fn l_curly(&self) -> Option<SyntaxElement> {
-        self.syntax().children_with_tokens().find(|it| it.kind() == T!['{'])
-    }
 }
 
 impl ast::TypeParam {
     #[must_use]
     pub fn remove_bounds(&self) -> ast::TypeParam {
-        let colon = match self.colon_token() {
+        let colon = match self.colon() {
             Some(it) => it,
             None => return self.clone(),
         };
         let end = match self.type_bound_list() {
             Some(it) => it.syntax().clone().into(),
-            None => colon.clone().into(),
+            None => colon.syntax().clone().into(),
         };
-        self.replace_children(colon.into()..=end, iter::empty())
+        self.replace_children(colon.syntax().clone().into()..=end, iter::empty())
     }
 }
 
@@ -305,8 +297,12 @@ impl ast::UseTree {
             Some(it) => it,
             None => return self.clone(),
         };
-        let use_tree =
-            make::use_tree(suffix.clone(), self.use_tree_list(), self.alias(), self.has_star());
+        let use_tree = make::use_tree(
+            suffix.clone(),
+            self.use_tree_list(),
+            self.alias(),
+            self.star().is_some(),
+        );
         let nested = make::use_tree_list(iter::once(use_tree));
         return make::use_tree(prefix.clone(), Some(nested), None, false);
 
diff --git a/crates/ra_syntax/src/ast/expr_extensions.rs b/crates/ra_syntax/src/ast/expr_extensions.rs
index 8bbd946c0..40c8fca3b 100644
--- a/crates/ra_syntax/src/ast/expr_extensions.rs
+++ b/crates/ra_syntax/src/ast/expr_extensions.rs
@@ -52,6 +52,10 @@ impl ast::RefExpr {
     pub fn is_mut(&self) -> bool {
         self.syntax().children_with_tokens().any(|n| n.kind() == T![mut])
     }
+
+    pub fn raw_token(&self) -> Option<SyntaxToken> {
+        None // FIXME: implement &raw
+    }
 }
 
 #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
diff --git a/crates/ra_syntax/src/ast/extensions.rs b/crates/ra_syntax/src/ast/extensions.rs
index bf7d137be..33fe60762 100644
--- a/crates/ra_syntax/src/ast/extensions.rs
+++ b/crates/ra_syntax/src/ast/extensions.rs
@@ -4,7 +4,9 @@
 use itertools::Itertools;
 
 use crate::{
-    ast::{self, child_opt, children, AstNode, AttrInput, NameOwner, SyntaxNode},
+    ast::{
+        self, child_opt, children, support, AstNode, AstToken, AttrInput, NameOwner, SyntaxNode,
+    },
     SmolStr, SyntaxElement,
     SyntaxKind::*,
     SyntaxToken, T,
@@ -130,13 +132,6 @@ impl ast::PathSegment {
         };
         Some(res)
     }
-
-    pub fn has_colon_colon(&self) -> bool {
-        match self.syntax.first_child_or_token().map(|s| s.kind()) {
-            Some(T![::]) => true,
-            _ => false,
-        }
-    }
 }
 
 impl ast::Path {
@@ -154,12 +149,6 @@ impl ast::Module {
     }
 }
 
-impl ast::UseTree {
-    pub fn has_star(&self) -> bool {
-        self.syntax().children_with_tokens().any(|it| it.kind() == T![*])
-    }
-}
-
 impl ast::UseTreeList {
     pub fn parent_use_tree(&self) -> ast::UseTree {
         self.syntax()
@@ -167,20 +156,6 @@ impl ast::UseTreeList {
             .and_then(ast::UseTree::cast)
             .expect("UseTreeLists are always nested in UseTrees")
     }
-    pub fn l_curly(&self) -> Option<SyntaxToken> {
-        self.token(T!['{'])
-    }
-
-    pub fn r_curly(&self) -> Option<SyntaxToken> {
-        self.token(T!['}'])
-    }
-
-    fn token(&self, kind: SyntaxKind) -> Option<SyntaxToken> {
-        self.syntax()
-            .children_with_tokens()
-            .filter_map(|it| it.into_token())
-            .find(|it| it.kind() == kind)
-    }
 }
 
 impl ast::ImplDef {
@@ -387,24 +362,9 @@ pub enum SelfParamKind {
 }
 
 impl ast::SelfParam {
-    pub fn self_kw_token(&self) -> SyntaxToken {
-        self.syntax()
-            .children_with_tokens()
-            .filter_map(|it| it.into_token())
-            .find(|it| it.kind() == T![self])
-            .expect("invalid tree: self param must have self")
-    }
-
     pub fn kind(&self) -> SelfParamKind {
-        let borrowed = self.syntax().children_with_tokens().any(|n| n.kind() == T![&]);
-        if borrowed {
-            // check for a `mut` coming after the & -- `mut &self` != `&mut self`
-            if self
-                .syntax()
-                .children_with_tokens()
-                .skip_while(|n| n.kind() != T![&])
-                .any(|n| n.kind() == T![mut])
-            {
+        if self.amp().is_some() {
+            if self.amp_mut_kw().is_some() {
                 SelfParamKind::MutRef
             } else {
                 SelfParamKind::Ref
@@ -413,32 +373,23 @@ impl ast::SelfParam {
             SelfParamKind::Owned
         }
     }
-}
 
-impl ast::LifetimeParam {
-    pub fn lifetime_token(&self) -> Option<SyntaxToken> {
+    /// the "mut" in "mut self", not the one in "&mut self"
+    pub fn mut_kw(&self) -> Option<ast::MutKw> {
         self.syntax()
             .children_with_tokens()
             .filter_map(|it| it.into_token())
-            .find(|it| it.kind() == LIFETIME)
+            .take_while(|it| it.kind() != T![&])
+            .find_map(ast::MutKw::cast)
     }
-}
 
-impl ast::TypeParam {
-    pub fn colon_token(&self) -> Option<SyntaxToken> {
+    /// the "mut" in "&mut self", not the one in "mut self"
+    pub fn amp_mut_kw(&self) -> Option<ast::MutKw> {
         self.syntax()
             .children_with_tokens()
             .filter_map(|it| it.into_token())
-            .find(|it| it.kind() == T![:])
-    }
-}
-
-impl ast::WherePred {
-    pub fn lifetime_token(&self) -> Option<SyntaxToken> {
-        self.syntax()
-            .children_with_tokens()
-            .filter_map(|it| it.into_token())
-            .find(|it| it.kind() == LIFETIME)
+            .skip_while(|it| it.kind() != T![&])
+            .find_map(ast::MutKw::cast)
     }
 }
 
@@ -449,7 +400,7 @@ pub enum TypeBoundKind {
     /// for<'a> ...
     ForType(ast::ForType),
     /// 'a
-    Lifetime(ast::SyntaxToken),
+    Lifetime(ast::Lifetime),
 }
 
 impl ast::TypeBound {
@@ -465,21 +416,28 @@ impl ast::TypeBound {
         }
     }
 
-    fn lifetime(&self) -> Option<SyntaxToken> {
-        self.syntax()
-            .children_with_tokens()
-            .filter_map(|it| it.into_token())
-            .find(|it| it.kind() == LIFETIME)
+    pub fn has_question_mark(&self) -> bool {
+        self.question().is_some()
     }
 
-    pub fn question_mark_token(&self) -> Option<SyntaxToken> {
+    pub fn const_question(&self) -> Option<ast::Question> {
         self.syntax()
             .children_with_tokens()
             .filter_map(|it| it.into_token())
-            .find(|it| it.kind() == T![?])
+            .take_while(|it| it.kind() != T![const])
+            .find_map(ast::Question::cast)
     }
-    pub fn has_question_mark(&self) -> bool {
-        self.question_mark_token().is_some()
+
+    pub fn question(&self) -> Option<ast::Question> {
+        if self.const_kw().is_some() {
+            self.syntax()
+                .children_with_tokens()
+                .filter_map(|it| it.into_token())
+                .skip_while(|it| it.kind() != T![const])
+                .find_map(ast::Question::cast)
+        } else {
+            support::token(&self.syntax)
+        }
     }
 }
 
@@ -493,6 +451,7 @@ pub enum VisibilityKind {
     In(ast::Path),
     PubCrate,
     PubSuper,
+    PubSelf,
     Pub,
 }
 
@@ -504,6 +463,8 @@ impl ast::Visibility {
             VisibilityKind::PubCrate
         } else if self.is_pub_super() {
             VisibilityKind::PubSuper
+        } else if self.is_pub_self() {
+            VisibilityKind::PubSuper
         } else {
             VisibilityKind::Pub
         }
@@ -516,6 +477,10 @@ impl ast::Visibility {
     fn is_pub_super(&self) -> bool {
         self.syntax().children_with_tokens().any(|it| it.kind() == T![super])
     }
+
+    fn is_pub_self(&self) -> bool {
+        self.syntax().children_with_tokens().any(|it| it.kind() == T![self])
+    }
 }
 
 impl ast::MacroCall {
@@ -528,3 +493,41 @@ impl ast::MacroCall {
         }
     }
 }
+
+impl ast::LifetimeParam {
+    pub fn lifetime_bounds(&self) -> impl Iterator<Item = ast::Lifetime> {
+        self.syntax()
+            .children_with_tokens()
+            .filter_map(|it| it.into_token())
+            .skip_while(|x| x.kind() != T![:])
+            .filter_map(ast::Lifetime::cast)
+    }
+}
+
+impl ast::RangePat {
+    pub fn start(&self) -> Option<ast::Pat> {
+        self.syntax()
+            .children_with_tokens()
+            .take_while(|it| !ast::RangeSeparator::can_cast(it.kind()))
+            .filter_map(|it| it.into_node())
+            .find_map(ast::Pat::cast)
+    }
+
+    pub fn end(&self) -> Option<ast::Pat> {
+        self.syntax()
+            .children_with_tokens()
+            .skip_while(|it| !ast::RangeSeparator::can_cast(it.kind()))
+            .filter_map(|it| it.into_node())
+            .find_map(ast::Pat::cast)
+    }
+}
+
+impl ast::TokenTree {
+    pub fn left_delimiter(&self) -> Option<ast::LeftDelimiter> {
+        self.syntax().first_child_or_token()?.into_token().and_then(ast::LeftDelimiter::cast)
+    }
+
+    pub fn right_delimiter(&self) -> Option<ast::RightDelimiter> {
+        self.syntax().last_child_or_token()?.into_token().and_then(ast::RightDelimiter::cast)
+    }
+}
diff --git a/crates/ra_syntax/src/ast/generated.rs b/crates/ra_syntax/src/ast/generated.rs
index d2b055b0a..f5199e09f 100644
--- a/crates/ra_syntax/src/ast/generated.rs
+++ b/crates/ra_syntax/src/ast/generated.rs
@@ -1,7877 +1,6 @@
-//! Generated file, do not edit by hand, see `xtask/src/codegen`
+//! This file is actually hand-written, but the submodules are indeed generated.
 
-#[allow(unused_imports)]
-use crate::{
-    ast::{self, AstChildren, AstNode, AstToken},
-    NodeOrToken, SyntaxElement,
-    SyntaxKind::{self, *},
-    SyntaxNode, SyntaxToken,
-};
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Semi {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Semi {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Semi {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SEMI => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Comma {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Comma {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Comma {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            COMMA => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LParen {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for LParen {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for LParen {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            L_PAREN => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RParen {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for RParen {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for RParen {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            R_PAREN => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LCurly {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for LCurly {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for LCurly {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            L_CURLY => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RCurly {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for RCurly {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for RCurly {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            R_CURLY => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LBrack {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for LBrack {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for LBrack {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            L_BRACK => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RBrack {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for RBrack {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for RBrack {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            R_BRACK => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LAngle {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for LAngle {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for LAngle {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            L_ANGLE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RAngle {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for RAngle {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for RAngle {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            R_ANGLE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct At {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for At {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for At {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            AT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Pound {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Pound {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Pound {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            POUND => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Tilde {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Tilde {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Tilde {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TILDE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Question {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Question {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Question {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            QUESTION => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Dollar {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Dollar {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Dollar {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DOLLAR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Amp {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Amp {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Amp {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            AMP => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Pipe {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Pipe {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Pipe {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PIPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Plus {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Plus {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Plus {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PLUS => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Star {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Star {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Star {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STAR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Slash {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Slash {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Slash {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SLASH => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Caret {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Caret {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Caret {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CARET => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Percent {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Percent {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Percent {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PERCENT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Underscore {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Underscore {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Underscore {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            UNDERSCORE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Dot {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Dot {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Dot {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DOT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Dotdot {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Dotdot {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Dotdot {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DOTDOT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Dotdotdot {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Dotdotdot {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Dotdotdot {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DOTDOTDOT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Dotdoteq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Dotdoteq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Dotdoteq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DOTDOTEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Colon {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Colon {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Colon {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            COLON => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Coloncolon {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Coloncolon {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Coloncolon {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            COLONCOLON => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Eq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Eq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Eq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            EQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Eqeq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Eqeq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Eqeq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            EQEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct FatArrow {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for FatArrow {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for FatArrow {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FAT_ARROW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Excl {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Excl {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Excl {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            EXCL => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Neq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Neq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Neq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            NEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Minus {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Minus {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Minus {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MINUS => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ThinArrow {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ThinArrow {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ThinArrow {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            THIN_ARROW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Lteq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Lteq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Lteq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LTEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Gteq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Gteq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Gteq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            GTEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Pluseq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Pluseq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Pluseq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PLUSEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Minuseq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Minuseq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Minuseq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MINUSEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Pipeeq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Pipeeq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Pipeeq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PIPEEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Ampeq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Ampeq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Ampeq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            AMPEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Careteq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Careteq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Careteq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CARETEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Slasheq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Slasheq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Slasheq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SLASHEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Stareq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Stareq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Stareq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STAREQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Percenteq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Percenteq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Percenteq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PERCENTEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Ampamp {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Ampamp {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Ampamp {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            AMPAMP => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Pipepipe {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Pipepipe {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Pipepipe {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PIPEPIPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Shl {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Shl {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Shl {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SHL => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Shr {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Shr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Shr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SHR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Shleq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Shleq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Shleq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SHLEQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Shreq {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Shreq {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Shreq {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SHREQ => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct AsKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for AsKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for AsKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            AS_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct AsyncKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for AsyncKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for AsyncKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ASYNC_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct AwaitKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for AwaitKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for AwaitKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            AWAIT_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct BoxKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for BoxKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for BoxKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BOX_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct BreakKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for BreakKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for BreakKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BREAK_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ConstKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ConstKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ConstKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CONST_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ContinueKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ContinueKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ContinueKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CONTINUE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct CrateKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for CrateKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for CrateKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CRATE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct DynKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for DynKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for DynKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DYN_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ElseKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ElseKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ElseKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ELSE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct EnumKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for EnumKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for EnumKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ENUM_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ExternKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ExternKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ExternKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            EXTERN_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct FalseKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for FalseKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for FalseKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FALSE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct FnKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for FnKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for FnKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FN_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ForKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ForKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ForKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FOR_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct IfKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for IfKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for IfKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            IF_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ImplKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ImplKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ImplKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            IMPL_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct InKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for InKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for InKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            IN_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LetKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for LetKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for LetKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LET_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LoopKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for LoopKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for LoopKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LOOP_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MacroKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for MacroKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for MacroKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MACRO_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MatchKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for MatchKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for MatchKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MATCH_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ModKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ModKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ModKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MOD_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MoveKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for MoveKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for MoveKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MOVE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MutKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for MutKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for MutKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MUT_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PubKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for PubKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for PubKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PUB_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RefKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for RefKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for RefKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            REF_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ReturnKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ReturnKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ReturnKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RETURN_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct SelfKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for SelfKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for SelfKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SELF_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct StaticKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for StaticKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for StaticKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STATIC_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct StructKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for StructKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for StructKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STRUCT_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct SuperKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for SuperKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for SuperKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SUPER_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TraitKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for TraitKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for TraitKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TRAIT_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TrueKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for TrueKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for TrueKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TRUE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TryKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for TryKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for TryKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TRY_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TypeKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for TypeKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for TypeKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TYPE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct UnsafeKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for UnsafeKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for UnsafeKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            UNSAFE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct UseKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for UseKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for UseKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            USE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct WhereKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for WhereKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for WhereKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            WHERE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct WhileKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for WhileKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for WhileKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            WHILE_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct AutoKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for AutoKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for AutoKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            AUTO_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct DefaultKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for DefaultKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for DefaultKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DEFAULT_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ExistentialKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ExistentialKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ExistentialKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            EXISTENTIAL_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct UnionKw {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for UnionKw {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for UnionKw {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            UNION_KW => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct IntNumber {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for IntNumber {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for IntNumber {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            INT_NUMBER => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct FloatNumber {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for FloatNumber {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for FloatNumber {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FLOAT_NUMBER => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Char {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Char {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Char {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CHAR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Byte {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Byte {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Byte {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BYTE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct String {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for String {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for String {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STRING => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RawString {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for RawString {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for RawString {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RAW_STRING => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ByteString {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for ByteString {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for ByteString {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BYTE_STRING => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RawByteString {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for RawByteString {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for RawByteString {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RAW_BYTE_STRING => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Error {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Error {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Error {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ERROR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Ident {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Ident {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Ident {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            IDENT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Whitespace {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Whitespace {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Whitespace {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            WHITESPACE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Lifetime {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Lifetime {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Lifetime {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LIFETIME => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Comment {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Comment {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Comment {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            COMMENT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Shebang {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for Shebang {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for Shebang {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SHEBANG => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LDollar {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for LDollar {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for LDollar {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            L_DOLLAR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RDollar {
-    pub(crate) syntax: SyntaxToken,
-}
-impl std::fmt::Display for RDollar {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(&self.syntax, f)
-    }
-}
-impl AstToken for RDollar {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            R_DOLLAR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxToken) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxToken {
-        &self.syntax
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct SourceFile {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for SourceFile {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for SourceFile {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SOURCE_FILE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::ModuleItemOwner for SourceFile {}
-impl ast::FnDefOwner for SourceFile {}
-impl SourceFile {
-    pub fn modules(&self) -> AstChildren<Module> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct FnDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for FnDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for FnDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FN_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for FnDef {}
-impl ast::NameOwner for FnDef {}
-impl ast::TypeParamsOwner for FnDef {}
-impl ast::DocCommentsOwner for FnDef {}
-impl ast::AttrsOwner for FnDef {}
-impl FnDef {
-    pub fn param_list(&self) -> Option<ParamList> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn ret_type(&self) -> Option<RetType> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn body(&self) -> Option<BlockExpr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RetType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RetType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RetType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RET_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RetType {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct StructDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for StructDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for StructDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STRUCT_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for StructDef {}
-impl ast::NameOwner for StructDef {}
-impl ast::TypeParamsOwner for StructDef {}
-impl ast::AttrsOwner for StructDef {}
-impl ast::DocCommentsOwner for StructDef {}
-impl StructDef {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct UnionDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for UnionDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for UnionDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            UNION_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for UnionDef {}
-impl ast::NameOwner for UnionDef {}
-impl ast::TypeParamsOwner for UnionDef {}
-impl ast::AttrsOwner for UnionDef {}
-impl ast::DocCommentsOwner for UnionDef {}
-impl UnionDef {
-    pub fn record_field_def_list(&self) -> Option<RecordFieldDefList> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RecordFieldDefList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RecordFieldDefList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RecordFieldDefList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RECORD_FIELD_DEF_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RecordFieldDefList {
-    pub fn fields(&self) -> AstChildren<RecordFieldDef> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RecordFieldDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RecordFieldDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RecordFieldDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RECORD_FIELD_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for RecordFieldDef {}
-impl ast::NameOwner for RecordFieldDef {}
-impl ast::AttrsOwner for RecordFieldDef {}
-impl ast::DocCommentsOwner for RecordFieldDef {}
-impl ast::TypeAscriptionOwner for RecordFieldDef {}
-impl RecordFieldDef {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TupleFieldDefList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TupleFieldDefList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TupleFieldDefList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TUPLE_FIELD_DEF_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TupleFieldDefList {
-    pub fn fields(&self) -> AstChildren<TupleFieldDef> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TupleFieldDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TupleFieldDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TupleFieldDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TUPLE_FIELD_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for TupleFieldDef {}
-impl ast::AttrsOwner for TupleFieldDef {}
-impl TupleFieldDef {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct EnumDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for EnumDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for EnumDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ENUM_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for EnumDef {}
-impl ast::NameOwner for EnumDef {}
-impl ast::TypeParamsOwner for EnumDef {}
-impl ast::AttrsOwner for EnumDef {}
-impl ast::DocCommentsOwner for EnumDef {}
-impl EnumDef {
-    pub fn variant_list(&self) -> Option<EnumVariantList> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct EnumVariantList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for EnumVariantList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for EnumVariantList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ENUM_VARIANT_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl EnumVariantList {
-    pub fn variants(&self) -> AstChildren<EnumVariant> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct EnumVariant {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for EnumVariant {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for EnumVariant {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ENUM_VARIANT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::NameOwner for EnumVariant {}
-impl ast::DocCommentsOwner for EnumVariant {}
-impl ast::AttrsOwner for EnumVariant {}
-impl EnumVariant {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TraitDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TraitDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TraitDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TRAIT_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for TraitDef {}
-impl ast::NameOwner for TraitDef {}
-impl ast::AttrsOwner for TraitDef {}
-impl ast::DocCommentsOwner for TraitDef {}
-impl ast::TypeParamsOwner for TraitDef {}
-impl ast::TypeBoundsOwner for TraitDef {}
-impl TraitDef {
-    pub fn item_list(&self) -> Option<ItemList> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Module {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Module {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Module {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MODULE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for Module {}
-impl ast::NameOwner for Module {}
-impl ast::AttrsOwner for Module {}
-impl ast::DocCommentsOwner for Module {}
-impl Module {
-    pub fn item_list(&self) -> Option<ItemList> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ItemList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ItemList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ItemList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ITEM_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::FnDefOwner for ItemList {}
-impl ast::ModuleItemOwner for ItemList {}
-impl ItemList {
-    pub fn impl_items(&self) -> AstChildren<ImplItem> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ConstDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ConstDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ConstDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CONST_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for ConstDef {}
-impl ast::NameOwner for ConstDef {}
-impl ast::TypeParamsOwner for ConstDef {}
-impl ast::AttrsOwner for ConstDef {}
-impl ast::DocCommentsOwner for ConstDef {}
-impl ast::TypeAscriptionOwner for ConstDef {}
-impl ConstDef {
-    pub fn body(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct StaticDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for StaticDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for StaticDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STATIC_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for StaticDef {}
-impl ast::NameOwner for StaticDef {}
-impl ast::TypeParamsOwner for StaticDef {}
-impl ast::AttrsOwner for StaticDef {}
-impl ast::DocCommentsOwner for StaticDef {}
-impl ast::TypeAscriptionOwner for StaticDef {}
-impl StaticDef {
-    pub fn body(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TypeAliasDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TypeAliasDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TypeAliasDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TYPE_ALIAS_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::VisibilityOwner for TypeAliasDef {}
-impl ast::NameOwner for TypeAliasDef {}
-impl ast::TypeParamsOwner for TypeAliasDef {}
-impl ast::AttrsOwner for TypeAliasDef {}
-impl ast::DocCommentsOwner for TypeAliasDef {}
-impl ast::TypeBoundsOwner for TypeAliasDef {}
-impl TypeAliasDef {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ImplDef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ImplDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ImplDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            IMPL_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::TypeParamsOwner for ImplDef {}
-impl ast::AttrsOwner for ImplDef {}
-impl ImplDef {
-    pub fn item_list(&self) -> Option<ItemList> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ParenType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ParenType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ParenType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PAREN_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ParenType {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TupleType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TupleType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TupleType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TUPLE_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TupleType {
-    pub fn fields(&self) -> AstChildren<TypeRef> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct NeverType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for NeverType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for NeverType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            NEVER_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl NeverType {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PathType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for PathType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for PathType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PATH_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl PathType {
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PointerType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for PointerType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for PointerType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            POINTER_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl PointerType {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ArrayType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ArrayType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ArrayType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ARRAY_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ArrayType {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct SliceType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for SliceType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for SliceType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SLICE_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl SliceType {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ReferenceType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ReferenceType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ReferenceType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            REFERENCE_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ReferenceType {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PlaceholderType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for PlaceholderType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for PlaceholderType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PLACEHOLDER_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl PlaceholderType {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct FnPointerType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for FnPointerType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for FnPointerType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FN_POINTER_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl FnPointerType {
-    pub fn param_list(&self) -> Option<ParamList> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn ret_type(&self) -> Option<RetType> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ForType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ForType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ForType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FOR_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ForType {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ImplTraitType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ImplTraitType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ImplTraitType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            IMPL_TRAIT_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::TypeBoundsOwner for ImplTraitType {}
-impl ImplTraitType {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct DynTraitType {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for DynTraitType {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for DynTraitType {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DYN_TRAIT_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::TypeBoundsOwner for DynTraitType {}
-impl DynTraitType {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TupleExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TupleExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TupleExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TUPLE_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TupleExpr {
-    pub fn exprs(&self) -> AstChildren<Expr> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ArrayExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ArrayExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ArrayExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ARRAY_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ArrayExpr {
-    pub fn exprs(&self) -> AstChildren<Expr> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ParenExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ParenExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ParenExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PAREN_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ParenExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PathExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for PathExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for PathExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PATH_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl PathExpr {
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LambdaExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for LambdaExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for LambdaExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LAMBDA_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl LambdaExpr {
-    pub fn param_list(&self) -> Option<ParamList> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn ret_type(&self) -> Option<RetType> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn body(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct IfExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for IfExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for IfExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            IF_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl IfExpr {
-    pub fn condition(&self) -> Option<Condition> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LoopExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for LoopExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for LoopExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LOOP_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::LoopBodyOwner for LoopExpr {}
-impl LoopExpr {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TryBlockExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TryBlockExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TryBlockExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TRY_BLOCK_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TryBlockExpr {
-    pub fn body(&self) -> Option<BlockExpr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ForExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ForExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ForExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FOR_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::LoopBodyOwner for ForExpr {}
-impl ForExpr {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn iterable(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct WhileExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for WhileExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for WhileExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            WHILE_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::LoopBodyOwner for WhileExpr {}
-impl WhileExpr {
-    pub fn condition(&self) -> Option<Condition> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ContinueExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ContinueExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ContinueExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CONTINUE_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ContinueExpr {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct BreakExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for BreakExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for BreakExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BREAK_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl BreakExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Label {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Label {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Label {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LABEL => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl Label {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct BlockExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for BlockExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for BlockExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BLOCK_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl BlockExpr {
-    pub fn block(&self) -> Option<Block> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ReturnExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ReturnExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ReturnExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RETURN_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ReturnExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct CallExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for CallExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for CallExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CALL_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::ArgListOwner for CallExpr {}
-impl CallExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MethodCallExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MethodCallExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MethodCallExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            METHOD_CALL_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::ArgListOwner for MethodCallExpr {}
-impl MethodCallExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn name_ref(&self) -> Option<NameRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn type_arg_list(&self) -> Option<TypeArgList> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct IndexExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for IndexExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for IndexExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            INDEX_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl IndexExpr {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct FieldExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for FieldExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for FieldExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FIELD_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl FieldExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn name_ref(&self) -> Option<NameRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct AwaitExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for AwaitExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for AwaitExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            AWAIT_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl AwaitExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TryExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TryExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TryExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TRY_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TryExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct CastExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for CastExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for CastExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CAST_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl CastExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RefExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RefExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RefExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            REF_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RefExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PrefixExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for PrefixExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for PrefixExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PREFIX_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl PrefixExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct BoxExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for BoxExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for BoxExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BOX_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl BoxExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RangeExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RangeExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RangeExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RANGE_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RangeExpr {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct BinExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for BinExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for BinExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BIN_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl BinExpr {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Literal {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Literal {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Literal {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LITERAL => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl Literal {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MatchExpr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MatchExpr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MatchExpr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MATCH_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl MatchExpr {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn match_arm_list(&self) -> Option<MatchArmList> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MatchArmList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MatchArmList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MatchArmList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MATCH_ARM_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::AttrsOwner for MatchArmList {}
-impl MatchArmList {
-    pub fn arms(&self) -> AstChildren<MatchArm> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MatchArm {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MatchArm {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MatchArm {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MATCH_ARM => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::AttrsOwner for MatchArm {}
-impl MatchArm {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn guard(&self) -> Option<MatchGuard> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MatchGuard {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MatchGuard {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MatchGuard {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MATCH_GUARD => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl MatchGuard {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RecordLit {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RecordLit {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RecordLit {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RECORD_LIT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RecordLit {
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn record_field_list(&self) -> Option<RecordFieldList> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RecordFieldList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RecordFieldList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RecordFieldList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RECORD_FIELD_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RecordFieldList {
-    pub fn fields(&self) -> AstChildren<RecordField> {
-        AstChildren::new(&self.syntax)
-    }
-    pub fn spread(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RecordField {
-    pub(crate) syntax: SyntaxNode,
-}
-impl ast::AttrsOwner for RecordField {}
-impl std::fmt::Display for RecordField {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RecordField {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RECORD_FIELD => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RecordField {
-    pub fn name_ref(&self) -> Option<NameRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct OrPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for OrPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for OrPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            OR_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl OrPat {
-    pub fn pats(&self) -> AstChildren<Pat> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ParenPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ParenPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ParenPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PAREN_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ParenPat {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RefPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RefPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RefPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            REF_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RefPat {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct BoxPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for BoxPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for BoxPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BOX_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl BoxPat {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct BindPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for BindPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for BindPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BIND_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::NameOwner for BindPat {}
-impl BindPat {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PlaceholderPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for PlaceholderPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for PlaceholderPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PLACEHOLDER_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl PlaceholderPat {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct DotDotPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for DotDotPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for DotDotPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            DOT_DOT_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl DotDotPat {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PathPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for PathPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for PathPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PATH_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl PathPat {
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct SlicePat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for SlicePat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for SlicePat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SLICE_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl SlicePat {
-    pub fn args(&self) -> AstChildren<Pat> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RangePat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RangePat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RangePat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RANGE_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RangePat {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LiteralPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for LiteralPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for LiteralPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LITERAL_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl LiteralPat {
-    pub fn literal(&self) -> Option<Literal> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MacroPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MacroPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MacroPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MACRO_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl MacroPat {
-    pub fn macro_call(&self) -> Option<MacroCall> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RecordPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RecordPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RecordPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RECORD_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RecordPat {
-    pub fn record_field_pat_list(&self) -> Option<RecordFieldPatList> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RecordFieldPatList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RecordFieldPatList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RecordFieldPatList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RECORD_FIELD_PAT_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl RecordFieldPatList {
-    pub fn record_field_pats(&self) -> AstChildren<RecordFieldPat> {
-        AstChildren::new(&self.syntax)
-    }
-    pub fn bind_pats(&self) -> AstChildren<BindPat> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RecordFieldPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for RecordFieldPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for RecordFieldPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            RECORD_FIELD_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::NameOwner for RecordFieldPat {}
-impl RecordFieldPat {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TupleStructPat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TupleStructPat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TupleStructPat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TUPLE_STRUCT_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TupleStructPat {
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn args(&self) -> AstChildren<Pat> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TuplePat {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TuplePat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TuplePat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TUPLE_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TuplePat {
-    pub fn args(&self) -> AstChildren<Pat> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Visibility {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Visibility {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Visibility {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            VISIBILITY => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl Visibility {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Name {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Name {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Name {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            NAME => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl Name {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct NameRef {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for NameRef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for NameRef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            NAME_REF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl NameRef {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MacroCall {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MacroCall {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MacroCall {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MACRO_CALL => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::NameOwner for MacroCall {}
-impl ast::AttrsOwner for MacroCall {}
-impl ast::DocCommentsOwner for MacroCall {}
-impl MacroCall {
-    pub fn token_tree(&self) -> Option<TokenTree> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Attr {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Attr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Attr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ATTR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl Attr {
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn input(&self) -> Option<AttrInput> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TokenTree {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TokenTree {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TokenTree {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TOKEN_TREE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TokenTree {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TypeParamList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TypeParamList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TypeParamList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TYPE_PARAM_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TypeParamList {
-    pub fn type_params(&self) -> AstChildren<TypeParam> {
-        AstChildren::new(&self.syntax)
-    }
-    pub fn lifetime_params(&self) -> AstChildren<LifetimeParam> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TypeParam {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TypeParam {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TypeParam {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TYPE_PARAM => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::NameOwner for TypeParam {}
-impl ast::AttrsOwner for TypeParam {}
-impl ast::TypeBoundsOwner for TypeParam {}
-impl TypeParam {
-    pub fn default_type(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ConstParam {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ConstParam {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ConstParam {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CONST_PARAM => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::NameOwner for ConstParam {}
-impl ast::AttrsOwner for ConstParam {}
-impl ast::TypeAscriptionOwner for ConstParam {}
-impl ConstParam {
-    pub fn default_val(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LifetimeParam {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for LifetimeParam {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for LifetimeParam {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LIFETIME_PARAM => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::AttrsOwner for LifetimeParam {}
-impl LifetimeParam {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TypeBound {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TypeBound {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TypeBound {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TYPE_BOUND => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TypeBound {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TypeBoundList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TypeBoundList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TypeBoundList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TYPE_BOUND_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TypeBoundList {
-    pub fn bounds(&self) -> AstChildren<TypeBound> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct WherePred {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for WherePred {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for WherePred {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            WHERE_PRED => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::TypeBoundsOwner for WherePred {}
-impl WherePred {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct WhereClause {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for WhereClause {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for WhereClause {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            WHERE_CLAUSE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl WhereClause {
-    pub fn predicates(&self) -> AstChildren<WherePred> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ExprStmt {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ExprStmt {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ExprStmt {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            EXPR_STMT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ExprStmt {
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LetStmt {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for LetStmt {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for LetStmt {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LET_STMT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::TypeAscriptionOwner for LetStmt {}
-impl LetStmt {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn initializer(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Condition {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Condition {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Condition {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CONDITION => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl Condition {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Block {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Block {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Block {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            BLOCK => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::AttrsOwner for Block {}
-impl ast::ModuleItemOwner for Block {}
-impl Block {
-    pub fn statements(&self) -> AstChildren<Stmt> {
-        AstChildren::new(&self.syntax)
-    }
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ParamList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ParamList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ParamList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PARAM_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ParamList {
-    pub fn self_param(&self) -> Option<SelfParam> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn params(&self) -> AstChildren<Param> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct SelfParam {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for SelfParam {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for SelfParam {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            SELF_PARAM => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::TypeAscriptionOwner for SelfParam {}
-impl ast::AttrsOwner for SelfParam {}
-impl SelfParam {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Param {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Param {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Param {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PARAM => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::TypeAscriptionOwner for Param {}
-impl ast::AttrsOwner for Param {}
-impl Param {
-    pub fn pat(&self) -> Option<Pat> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct UseItem {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for UseItem {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for UseItem {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            USE_ITEM => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::AttrsOwner for UseItem {}
-impl ast::VisibilityOwner for UseItem {}
-impl UseItem {
-    pub fn use_tree(&self) -> Option<UseTree> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct UseTree {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for UseTree {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for UseTree {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            USE_TREE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl UseTree {
-    pub fn path(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn use_tree_list(&self) -> Option<UseTreeList> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn alias(&self) -> Option<Alias> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Alias {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Alias {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Alias {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ALIAS => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::NameOwner for Alias {}
-impl Alias {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct UseTreeList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for UseTreeList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for UseTreeList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            USE_TREE_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl UseTreeList {
-    pub fn use_trees(&self) -> AstChildren<UseTree> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ExternCrateItem {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ExternCrateItem {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ExternCrateItem {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            EXTERN_CRATE_ITEM => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::AttrsOwner for ExternCrateItem {}
-impl ast::VisibilityOwner for ExternCrateItem {}
-impl ExternCrateItem {
-    pub fn name_ref(&self) -> Option<NameRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn alias(&self) -> Option<Alias> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ArgList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ArgList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ArgList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ARG_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ArgList {
-    pub fn args(&self) -> AstChildren<Expr> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct Path {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for Path {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Path {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PATH => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl Path {
-    pub fn segment(&self) -> Option<PathSegment> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn qualifier(&self) -> Option<Path> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct PathSegment {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for PathSegment {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for PathSegment {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PATH_SEGMENT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl PathSegment {
-    pub fn name_ref(&self) -> Option<NameRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn type_arg_list(&self) -> Option<TypeArgList> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn param_list(&self) -> Option<ParamList> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn ret_type(&self) -> Option<RetType> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn path_type(&self) -> Option<PathType> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TypeArgList {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TypeArgList {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TypeArgList {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TYPE_ARG_LIST => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TypeArgList {
-    pub fn type_args(&self) -> AstChildren<TypeArg> {
-        AstChildren::new(&self.syntax)
-    }
-    pub fn lifetime_args(&self) -> AstChildren<LifetimeArg> {
-        AstChildren::new(&self.syntax)
-    }
-    pub fn assoc_type_args(&self) -> AstChildren<AssocTypeArg> {
-        AstChildren::new(&self.syntax)
-    }
-    pub fn const_arg(&self) -> AstChildren<ConstArg> {
-        AstChildren::new(&self.syntax)
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct TypeArg {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for TypeArg {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TypeArg {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TYPE_ARG => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl TypeArg {
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct AssocTypeArg {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for AssocTypeArg {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for AssocTypeArg {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            ASSOC_TYPE_ARG => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl AssocTypeArg {
-    pub fn name_ref(&self) -> Option<NameRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn type_ref(&self) -> Option<TypeRef> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct LifetimeArg {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for LifetimeArg {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for LifetimeArg {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LIFETIME_ARG => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl LifetimeArg {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct ConstArg {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for ConstArg {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ConstArg {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            CONST_ARG => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ConstArg {
-    pub fn literal(&self) -> Option<Literal> {
-        AstChildren::new(&self.syntax).next()
-    }
-    pub fn block_expr(&self) -> Option<BlockExpr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MacroItems {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MacroItems {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MacroItems {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MACRO_ITEMS => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl ast::ModuleItemOwner for MacroItems {}
-impl ast::FnDefOwner for MacroItems {}
-impl MacroItems {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct MacroStmts {
-    pub(crate) syntax: SyntaxNode,
-}
-impl std::fmt::Display for MacroStmts {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for MacroStmts {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            MACRO_STMTS => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        if Self::can_cast(syntax.kind()) {
-            Some(Self { syntax })
-        } else {
-            None
-        }
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        &self.syntax
-    }
-}
-impl MacroStmts {
-    pub fn statements(&self) -> AstChildren<Stmt> {
-        AstChildren::new(&self.syntax)
-    }
-    pub fn expr(&self) -> Option<Expr> {
-        AstChildren::new(&self.syntax).next()
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum NominalDef {
-    StructDef(StructDef),
-    EnumDef(EnumDef),
-    UnionDef(UnionDef),
-}
-impl From<StructDef> for NominalDef {
-    fn from(node: StructDef) -> NominalDef {
-        NominalDef::StructDef(node)
-    }
-}
-impl From<EnumDef> for NominalDef {
-    fn from(node: EnumDef) -> NominalDef {
-        NominalDef::EnumDef(node)
-    }
-}
-impl From<UnionDef> for NominalDef {
-    fn from(node: UnionDef) -> NominalDef {
-        NominalDef::UnionDef(node)
-    }
-}
-impl std::fmt::Display for NominalDef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for NominalDef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STRUCT_DEF | ENUM_DEF | UNION_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        let res = match syntax.kind() {
-            STRUCT_DEF => NominalDef::StructDef(StructDef { syntax }),
-            ENUM_DEF => NominalDef::EnumDef(EnumDef { syntax }),
-            UNION_DEF => NominalDef::UnionDef(UnionDef { syntax }),
-            _ => return None,
-        };
-        Some(res)
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        match self {
-            NominalDef::StructDef(it) => &it.syntax,
-            NominalDef::EnumDef(it) => &it.syntax,
-            NominalDef::UnionDef(it) => &it.syntax,
-        }
-    }
-}
-impl ast::NameOwner for NominalDef {}
-impl ast::TypeParamsOwner for NominalDef {}
-impl ast::AttrsOwner for NominalDef {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum TypeRef {
-    ParenType(ParenType),
-    TupleType(TupleType),
-    NeverType(NeverType),
-    PathType(PathType),
-    PointerType(PointerType),
-    ArrayType(ArrayType),
-    SliceType(SliceType),
-    ReferenceType(ReferenceType),
-    PlaceholderType(PlaceholderType),
-    FnPointerType(FnPointerType),
-    ForType(ForType),
-    ImplTraitType(ImplTraitType),
-    DynTraitType(DynTraitType),
-}
-impl From<ParenType> for TypeRef {
-    fn from(node: ParenType) -> TypeRef {
-        TypeRef::ParenType(node)
-    }
-}
-impl From<TupleType> for TypeRef {
-    fn from(node: TupleType) -> TypeRef {
-        TypeRef::TupleType(node)
-    }
-}
-impl From<NeverType> for TypeRef {
-    fn from(node: NeverType) -> TypeRef {
-        TypeRef::NeverType(node)
-    }
-}
-impl From<PathType> for TypeRef {
-    fn from(node: PathType) -> TypeRef {
-        TypeRef::PathType(node)
-    }
-}
-impl From<PointerType> for TypeRef {
-    fn from(node: PointerType) -> TypeRef {
-        TypeRef::PointerType(node)
-    }
-}
-impl From<ArrayType> for TypeRef {
-    fn from(node: ArrayType) -> TypeRef {
-        TypeRef::ArrayType(node)
-    }
-}
-impl From<SliceType> for TypeRef {
-    fn from(node: SliceType) -> TypeRef {
-        TypeRef::SliceType(node)
-    }
-}
-impl From<ReferenceType> for TypeRef {
-    fn from(node: ReferenceType) -> TypeRef {
-        TypeRef::ReferenceType(node)
-    }
-}
-impl From<PlaceholderType> for TypeRef {
-    fn from(node: PlaceholderType) -> TypeRef {
-        TypeRef::PlaceholderType(node)
-    }
-}
-impl From<FnPointerType> for TypeRef {
-    fn from(node: FnPointerType) -> TypeRef {
-        TypeRef::FnPointerType(node)
-    }
-}
-impl From<ForType> for TypeRef {
-    fn from(node: ForType) -> TypeRef {
-        TypeRef::ForType(node)
-    }
-}
-impl From<ImplTraitType> for TypeRef {
-    fn from(node: ImplTraitType) -> TypeRef {
-        TypeRef::ImplTraitType(node)
-    }
-}
-impl From<DynTraitType> for TypeRef {
-    fn from(node: DynTraitType) -> TypeRef {
-        TypeRef::DynTraitType(node)
-    }
-}
-impl std::fmt::Display for TypeRef {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for TypeRef {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            PAREN_TYPE | TUPLE_TYPE | NEVER_TYPE | PATH_TYPE | POINTER_TYPE | ARRAY_TYPE
-            | SLICE_TYPE | REFERENCE_TYPE | PLACEHOLDER_TYPE | FN_POINTER_TYPE | FOR_TYPE
-            | IMPL_TRAIT_TYPE | DYN_TRAIT_TYPE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        let res = match syntax.kind() {
-            PAREN_TYPE => TypeRef::ParenType(ParenType { syntax }),
-            TUPLE_TYPE => TypeRef::TupleType(TupleType { syntax }),
-            NEVER_TYPE => TypeRef::NeverType(NeverType { syntax }),
-            PATH_TYPE => TypeRef::PathType(PathType { syntax }),
-            POINTER_TYPE => TypeRef::PointerType(PointerType { syntax }),
-            ARRAY_TYPE => TypeRef::ArrayType(ArrayType { syntax }),
-            SLICE_TYPE => TypeRef::SliceType(SliceType { syntax }),
-            REFERENCE_TYPE => TypeRef::ReferenceType(ReferenceType { syntax }),
-            PLACEHOLDER_TYPE => TypeRef::PlaceholderType(PlaceholderType { syntax }),
-            FN_POINTER_TYPE => TypeRef::FnPointerType(FnPointerType { syntax }),
-            FOR_TYPE => TypeRef::ForType(ForType { syntax }),
-            IMPL_TRAIT_TYPE => TypeRef::ImplTraitType(ImplTraitType { syntax }),
-            DYN_TRAIT_TYPE => TypeRef::DynTraitType(DynTraitType { syntax }),
-            _ => return None,
-        };
-        Some(res)
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        match self {
-            TypeRef::ParenType(it) => &it.syntax,
-            TypeRef::TupleType(it) => &it.syntax,
-            TypeRef::NeverType(it) => &it.syntax,
-            TypeRef::PathType(it) => &it.syntax,
-            TypeRef::PointerType(it) => &it.syntax,
-            TypeRef::ArrayType(it) => &it.syntax,
-            TypeRef::SliceType(it) => &it.syntax,
-            TypeRef::ReferenceType(it) => &it.syntax,
-            TypeRef::PlaceholderType(it) => &it.syntax,
-            TypeRef::FnPointerType(it) => &it.syntax,
-            TypeRef::ForType(it) => &it.syntax,
-            TypeRef::ImplTraitType(it) => &it.syntax,
-            TypeRef::DynTraitType(it) => &it.syntax,
-        }
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum ModuleItem {
-    StructDef(StructDef),
-    UnionDef(UnionDef),
-    EnumDef(EnumDef),
-    FnDef(FnDef),
-    TraitDef(TraitDef),
-    TypeAliasDef(TypeAliasDef),
-    ImplDef(ImplDef),
-    UseItem(UseItem),
-    ExternCrateItem(ExternCrateItem),
-    ConstDef(ConstDef),
-    StaticDef(StaticDef),
-    Module(Module),
-    MacroCall(MacroCall),
-}
-impl From<StructDef> for ModuleItem {
-    fn from(node: StructDef) -> ModuleItem {
-        ModuleItem::StructDef(node)
-    }
-}
-impl From<UnionDef> for ModuleItem {
-    fn from(node: UnionDef) -> ModuleItem {
-        ModuleItem::UnionDef(node)
-    }
-}
-impl From<EnumDef> for ModuleItem {
-    fn from(node: EnumDef) -> ModuleItem {
-        ModuleItem::EnumDef(node)
-    }
-}
-impl From<FnDef> for ModuleItem {
-    fn from(node: FnDef) -> ModuleItem {
-        ModuleItem::FnDef(node)
-    }
-}
-impl From<TraitDef> for ModuleItem {
-    fn from(node: TraitDef) -> ModuleItem {
-        ModuleItem::TraitDef(node)
-    }
-}
-impl From<TypeAliasDef> for ModuleItem {
-    fn from(node: TypeAliasDef) -> ModuleItem {
-        ModuleItem::TypeAliasDef(node)
-    }
-}
-impl From<ImplDef> for ModuleItem {
-    fn from(node: ImplDef) -> ModuleItem {
-        ModuleItem::ImplDef(node)
-    }
-}
-impl From<UseItem> for ModuleItem {
-    fn from(node: UseItem) -> ModuleItem {
-        ModuleItem::UseItem(node)
-    }
-}
-impl From<ExternCrateItem> for ModuleItem {
-    fn from(node: ExternCrateItem) -> ModuleItem {
-        ModuleItem::ExternCrateItem(node)
-    }
-}
-impl From<ConstDef> for ModuleItem {
-    fn from(node: ConstDef) -> ModuleItem {
-        ModuleItem::ConstDef(node)
-    }
-}
-impl From<StaticDef> for ModuleItem {
-    fn from(node: StaticDef) -> ModuleItem {
-        ModuleItem::StaticDef(node)
-    }
-}
-impl From<Module> for ModuleItem {
-    fn from(node: Module) -> ModuleItem {
-        ModuleItem::Module(node)
-    }
-}
-impl From<MacroCall> for ModuleItem {
-    fn from(node: MacroCall) -> ModuleItem {
-        ModuleItem::MacroCall(node)
-    }
-}
-impl std::fmt::Display for ModuleItem {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ModuleItem {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            STRUCT_DEF | UNION_DEF | ENUM_DEF | FN_DEF | TRAIT_DEF | TYPE_ALIAS_DEF | IMPL_DEF
-            | USE_ITEM | EXTERN_CRATE_ITEM | CONST_DEF | STATIC_DEF | MODULE | MACRO_CALL => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        let res = match syntax.kind() {
-            STRUCT_DEF => ModuleItem::StructDef(StructDef { syntax }),
-            UNION_DEF => ModuleItem::UnionDef(UnionDef { syntax }),
-            ENUM_DEF => ModuleItem::EnumDef(EnumDef { syntax }),
-            FN_DEF => ModuleItem::FnDef(FnDef { syntax }),
-            TRAIT_DEF => ModuleItem::TraitDef(TraitDef { syntax }),
-            TYPE_ALIAS_DEF => ModuleItem::TypeAliasDef(TypeAliasDef { syntax }),
-            IMPL_DEF => ModuleItem::ImplDef(ImplDef { syntax }),
-            USE_ITEM => ModuleItem::UseItem(UseItem { syntax }),
-            EXTERN_CRATE_ITEM => ModuleItem::ExternCrateItem(ExternCrateItem { syntax }),
-            CONST_DEF => ModuleItem::ConstDef(ConstDef { syntax }),
-            STATIC_DEF => ModuleItem::StaticDef(StaticDef { syntax }),
-            MODULE => ModuleItem::Module(Module { syntax }),
-            MACRO_CALL => ModuleItem::MacroCall(MacroCall { syntax }),
-            _ => return None,
-        };
-        Some(res)
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        match self {
-            ModuleItem::StructDef(it) => &it.syntax,
-            ModuleItem::UnionDef(it) => &it.syntax,
-            ModuleItem::EnumDef(it) => &it.syntax,
-            ModuleItem::FnDef(it) => &it.syntax,
-            ModuleItem::TraitDef(it) => &it.syntax,
-            ModuleItem::TypeAliasDef(it) => &it.syntax,
-            ModuleItem::ImplDef(it) => &it.syntax,
-            ModuleItem::UseItem(it) => &it.syntax,
-            ModuleItem::ExternCrateItem(it) => &it.syntax,
-            ModuleItem::ConstDef(it) => &it.syntax,
-            ModuleItem::StaticDef(it) => &it.syntax,
-            ModuleItem::Module(it) => &it.syntax,
-            ModuleItem::MacroCall(it) => &it.syntax,
-        }
-    }
-}
-impl ast::AttrsOwner for ModuleItem {}
-impl ast::VisibilityOwner for ModuleItem {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum ImplItem {
-    FnDef(FnDef),
-    TypeAliasDef(TypeAliasDef),
-    ConstDef(ConstDef),
-}
-impl From<FnDef> for ImplItem {
-    fn from(node: FnDef) -> ImplItem {
-        ImplItem::FnDef(node)
-    }
-}
-impl From<TypeAliasDef> for ImplItem {
-    fn from(node: TypeAliasDef) -> ImplItem {
-        ImplItem::TypeAliasDef(node)
-    }
-}
-impl From<ConstDef> for ImplItem {
-    fn from(node: ConstDef) -> ImplItem {
-        ImplItem::ConstDef(node)
-    }
-}
-impl std::fmt::Display for ImplItem {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for ImplItem {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            FN_DEF | TYPE_ALIAS_DEF | CONST_DEF => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        let res = match syntax.kind() {
-            FN_DEF => ImplItem::FnDef(FnDef { syntax }),
-            TYPE_ALIAS_DEF => ImplItem::TypeAliasDef(TypeAliasDef { syntax }),
-            CONST_DEF => ImplItem::ConstDef(ConstDef { syntax }),
-            _ => return None,
-        };
-        Some(res)
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        match self {
-            ImplItem::FnDef(it) => &it.syntax,
-            ImplItem::TypeAliasDef(it) => &it.syntax,
-            ImplItem::ConstDef(it) => &it.syntax,
-        }
-    }
-}
-impl ast::AttrsOwner for ImplItem {}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum Expr {
-    TupleExpr(TupleExpr),
-    ArrayExpr(ArrayExpr),
-    ParenExpr(ParenExpr),
-    PathExpr(PathExpr),
-    LambdaExpr(LambdaExpr),
-    IfExpr(IfExpr),
-    LoopExpr(LoopExpr),
-    ForExpr(ForExpr),
-    WhileExpr(WhileExpr),
-    ContinueExpr(ContinueExpr),
-    BreakExpr(BreakExpr),
-    Label(Label),
-    BlockExpr(BlockExpr),
-    ReturnExpr(ReturnExpr),
-    MatchExpr(MatchExpr),
-    RecordLit(RecordLit),
-    CallExpr(CallExpr),
-    IndexExpr(IndexExpr),
-    MethodCallExpr(MethodCallExpr),
-    FieldExpr(FieldExpr),
-    AwaitExpr(AwaitExpr),
-    TryExpr(TryExpr),
-    TryBlockExpr(TryBlockExpr),
-    CastExpr(CastExpr),
-    RefExpr(RefExpr),
-    PrefixExpr(PrefixExpr),
-    RangeExpr(RangeExpr),
-    BinExpr(BinExpr),
-    Literal(Literal),
-    MacroCall(MacroCall),
-    BoxExpr(BoxExpr),
-}
-impl From<TupleExpr> for Expr {
-    fn from(node: TupleExpr) -> Expr {
-        Expr::TupleExpr(node)
-    }
-}
-impl From<ArrayExpr> for Expr {
-    fn from(node: ArrayExpr) -> Expr {
-        Expr::ArrayExpr(node)
-    }
-}
-impl From<ParenExpr> for Expr {
-    fn from(node: ParenExpr) -> Expr {
-        Expr::ParenExpr(node)
-    }
-}
-impl From<PathExpr> for Expr {
-    fn from(node: PathExpr) -> Expr {
-        Expr::PathExpr(node)
-    }
-}
-impl From<LambdaExpr> for Expr {
-    fn from(node: LambdaExpr) -> Expr {
-        Expr::LambdaExpr(node)
-    }
-}
-impl From<IfExpr> for Expr {
-    fn from(node: IfExpr) -> Expr {
-        Expr::IfExpr(node)
-    }
-}
-impl From<LoopExpr> for Expr {
-    fn from(node: LoopExpr) -> Expr {
-        Expr::LoopExpr(node)
-    }
-}
-impl From<ForExpr> for Expr {
-    fn from(node: ForExpr) -> Expr {
-        Expr::ForExpr(node)
-    }
-}
-impl From<WhileExpr> for Expr {
-    fn from(node: WhileExpr) -> Expr {
-        Expr::WhileExpr(node)
-    }
-}
-impl From<ContinueExpr> for Expr {
-    fn from(node: ContinueExpr) -> Expr {
-        Expr::ContinueExpr(node)
-    }
-}
-impl From<BreakExpr> for Expr {
-    fn from(node: BreakExpr) -> Expr {
-        Expr::BreakExpr(node)
-    }
-}
-impl From<Label> for Expr {
-    fn from(node: Label) -> Expr {
-        Expr::Label(node)
-    }
-}
-impl From<BlockExpr> for Expr {
-    fn from(node: BlockExpr) -> Expr {
-        Expr::BlockExpr(node)
-    }
-}
-impl From<ReturnExpr> for Expr {
-    fn from(node: ReturnExpr) -> Expr {
-        Expr::ReturnExpr(node)
-    }
-}
-impl From<MatchExpr> for Expr {
-    fn from(node: MatchExpr) -> Expr {
-        Expr::MatchExpr(node)
-    }
-}
-impl From<RecordLit> for Expr {
-    fn from(node: RecordLit) -> Expr {
-        Expr::RecordLit(node)
-    }
-}
-impl From<CallExpr> for Expr {
-    fn from(node: CallExpr) -> Expr {
-        Expr::CallExpr(node)
-    }
-}
-impl From<IndexExpr> for Expr {
-    fn from(node: IndexExpr) -> Expr {
-        Expr::IndexExpr(node)
-    }
-}
-impl From<MethodCallExpr> for Expr {
-    fn from(node: MethodCallExpr) -> Expr {
-        Expr::MethodCallExpr(node)
-    }
-}
-impl From<FieldExpr> for Expr {
-    fn from(node: FieldExpr) -> Expr {
-        Expr::FieldExpr(node)
-    }
-}
-impl From<AwaitExpr> for Expr {
-    fn from(node: AwaitExpr) -> Expr {
-        Expr::AwaitExpr(node)
-    }
-}
-impl From<TryExpr> for Expr {
-    fn from(node: TryExpr) -> Expr {
-        Expr::TryExpr(node)
-    }
-}
-impl From<TryBlockExpr> for Expr {
-    fn from(node: TryBlockExpr) -> Expr {
-        Expr::TryBlockExpr(node)
-    }
-}
-impl From<CastExpr> for Expr {
-    fn from(node: CastExpr) -> Expr {
-        Expr::CastExpr(node)
-    }
-}
-impl From<RefExpr> for Expr {
-    fn from(node: RefExpr) -> Expr {
-        Expr::RefExpr(node)
-    }
-}
-impl From<PrefixExpr> for Expr {
-    fn from(node: PrefixExpr) -> Expr {
-        Expr::PrefixExpr(node)
-    }
-}
-impl From<RangeExpr> for Expr {
-    fn from(node: RangeExpr) -> Expr {
-        Expr::RangeExpr(node)
-    }
-}
-impl From<BinExpr> for Expr {
-    fn from(node: BinExpr) -> Expr {
-        Expr::BinExpr(node)
-    }
-}
-impl From<Literal> for Expr {
-    fn from(node: Literal) -> Expr {
-        Expr::Literal(node)
-    }
-}
-impl From<MacroCall> for Expr {
-    fn from(node: MacroCall) -> Expr {
-        Expr::MacroCall(node)
-    }
-}
-impl From<BoxExpr> for Expr {
-    fn from(node: BoxExpr) -> Expr {
-        Expr::BoxExpr(node)
-    }
-}
-impl std::fmt::Display for Expr {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Expr {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            TUPLE_EXPR | ARRAY_EXPR | PAREN_EXPR | PATH_EXPR | LAMBDA_EXPR | IF_EXPR
-            | LOOP_EXPR | FOR_EXPR | WHILE_EXPR | CONTINUE_EXPR | BREAK_EXPR | LABEL
-            | BLOCK_EXPR | RETURN_EXPR | MATCH_EXPR | RECORD_LIT | CALL_EXPR | INDEX_EXPR
-            | METHOD_CALL_EXPR | FIELD_EXPR | AWAIT_EXPR | TRY_EXPR | TRY_BLOCK_EXPR
-            | CAST_EXPR | REF_EXPR | PREFIX_EXPR | RANGE_EXPR | BIN_EXPR | LITERAL | MACRO_CALL
-            | BOX_EXPR => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        let res = match syntax.kind() {
-            TUPLE_EXPR => Expr::TupleExpr(TupleExpr { syntax }),
-            ARRAY_EXPR => Expr::ArrayExpr(ArrayExpr { syntax }),
-            PAREN_EXPR => Expr::ParenExpr(ParenExpr { syntax }),
-            PATH_EXPR => Expr::PathExpr(PathExpr { syntax }),
-            LAMBDA_EXPR => Expr::LambdaExpr(LambdaExpr { syntax }),
-            IF_EXPR => Expr::IfExpr(IfExpr { syntax }),
-            LOOP_EXPR => Expr::LoopExpr(LoopExpr { syntax }),
-            FOR_EXPR => Expr::ForExpr(ForExpr { syntax }),
-            WHILE_EXPR => Expr::WhileExpr(WhileExpr { syntax }),
-            CONTINUE_EXPR => Expr::ContinueExpr(ContinueExpr { syntax }),
-            BREAK_EXPR => Expr::BreakExpr(BreakExpr { syntax }),
-            LABEL => Expr::Label(Label { syntax }),
-            BLOCK_EXPR => Expr::BlockExpr(BlockExpr { syntax }),
-            RETURN_EXPR => Expr::ReturnExpr(ReturnExpr { syntax }),
-            MATCH_EXPR => Expr::MatchExpr(MatchExpr { syntax }),
-            RECORD_LIT => Expr::RecordLit(RecordLit { syntax }),
-            CALL_EXPR => Expr::CallExpr(CallExpr { syntax }),
-            INDEX_EXPR => Expr::IndexExpr(IndexExpr { syntax }),
-            METHOD_CALL_EXPR => Expr::MethodCallExpr(MethodCallExpr { syntax }),
-            FIELD_EXPR => Expr::FieldExpr(FieldExpr { syntax }),
-            AWAIT_EXPR => Expr::AwaitExpr(AwaitExpr { syntax }),
-            TRY_EXPR => Expr::TryExpr(TryExpr { syntax }),
-            TRY_BLOCK_EXPR => Expr::TryBlockExpr(TryBlockExpr { syntax }),
-            CAST_EXPR => Expr::CastExpr(CastExpr { syntax }),
-            REF_EXPR => Expr::RefExpr(RefExpr { syntax }),
-            PREFIX_EXPR => Expr::PrefixExpr(PrefixExpr { syntax }),
-            RANGE_EXPR => Expr::RangeExpr(RangeExpr { syntax }),
-            BIN_EXPR => Expr::BinExpr(BinExpr { syntax }),
-            LITERAL => Expr::Literal(Literal { syntax }),
-            MACRO_CALL => Expr::MacroCall(MacroCall { syntax }),
-            BOX_EXPR => Expr::BoxExpr(BoxExpr { syntax }),
-            _ => return None,
-        };
-        Some(res)
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        match self {
-            Expr::TupleExpr(it) => &it.syntax,
-            Expr::ArrayExpr(it) => &it.syntax,
-            Expr::ParenExpr(it) => &it.syntax,
-            Expr::PathExpr(it) => &it.syntax,
-            Expr::LambdaExpr(it) => &it.syntax,
-            Expr::IfExpr(it) => &it.syntax,
-            Expr::LoopExpr(it) => &it.syntax,
-            Expr::ForExpr(it) => &it.syntax,
-            Expr::WhileExpr(it) => &it.syntax,
-            Expr::ContinueExpr(it) => &it.syntax,
-            Expr::BreakExpr(it) => &it.syntax,
-            Expr::Label(it) => &it.syntax,
-            Expr::BlockExpr(it) => &it.syntax,
-            Expr::ReturnExpr(it) => &it.syntax,
-            Expr::MatchExpr(it) => &it.syntax,
-            Expr::RecordLit(it) => &it.syntax,
-            Expr::CallExpr(it) => &it.syntax,
-            Expr::IndexExpr(it) => &it.syntax,
-            Expr::MethodCallExpr(it) => &it.syntax,
-            Expr::FieldExpr(it) => &it.syntax,
-            Expr::AwaitExpr(it) => &it.syntax,
-            Expr::TryExpr(it) => &it.syntax,
-            Expr::TryBlockExpr(it) => &it.syntax,
-            Expr::CastExpr(it) => &it.syntax,
-            Expr::RefExpr(it) => &it.syntax,
-            Expr::PrefixExpr(it) => &it.syntax,
-            Expr::RangeExpr(it) => &it.syntax,
-            Expr::BinExpr(it) => &it.syntax,
-            Expr::Literal(it) => &it.syntax,
-            Expr::MacroCall(it) => &it.syntax,
-            Expr::BoxExpr(it) => &it.syntax,
-        }
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum Pat {
-    OrPat(OrPat),
-    ParenPat(ParenPat),
-    RefPat(RefPat),
-    BoxPat(BoxPat),
-    BindPat(BindPat),
-    PlaceholderPat(PlaceholderPat),
-    DotDotPat(DotDotPat),
-    PathPat(PathPat),
-    RecordPat(RecordPat),
-    TupleStructPat(TupleStructPat),
-    TuplePat(TuplePat),
-    SlicePat(SlicePat),
-    RangePat(RangePat),
-    LiteralPat(LiteralPat),
-    MacroPat(MacroPat),
-}
-impl From<OrPat> for Pat {
-    fn from(node: OrPat) -> Pat {
-        Pat::OrPat(node)
-    }
-}
-impl From<ParenPat> for Pat {
-    fn from(node: ParenPat) -> Pat {
-        Pat::ParenPat(node)
-    }
-}
-impl From<RefPat> for Pat {
-    fn from(node: RefPat) -> Pat {
-        Pat::RefPat(node)
-    }
-}
-impl From<BoxPat> for Pat {
-    fn from(node: BoxPat) -> Pat {
-        Pat::BoxPat(node)
-    }
-}
-impl From<BindPat> for Pat {
-    fn from(node: BindPat) -> Pat {
-        Pat::BindPat(node)
-    }
-}
-impl From<PlaceholderPat> for Pat {
-    fn from(node: PlaceholderPat) -> Pat {
-        Pat::PlaceholderPat(node)
-    }
-}
-impl From<DotDotPat> for Pat {
-    fn from(node: DotDotPat) -> Pat {
-        Pat::DotDotPat(node)
-    }
-}
-impl From<PathPat> for Pat {
-    fn from(node: PathPat) -> Pat {
-        Pat::PathPat(node)
-    }
-}
-impl From<RecordPat> for Pat {
-    fn from(node: RecordPat) -> Pat {
-        Pat::RecordPat(node)
-    }
-}
-impl From<TupleStructPat> for Pat {
-    fn from(node: TupleStructPat) -> Pat {
-        Pat::TupleStructPat(node)
-    }
-}
-impl From<TuplePat> for Pat {
-    fn from(node: TuplePat) -> Pat {
-        Pat::TuplePat(node)
-    }
-}
-impl From<SlicePat> for Pat {
-    fn from(node: SlicePat) -> Pat {
-        Pat::SlicePat(node)
-    }
-}
-impl From<RangePat> for Pat {
-    fn from(node: RangePat) -> Pat {
-        Pat::RangePat(node)
-    }
-}
-impl From<LiteralPat> for Pat {
-    fn from(node: LiteralPat) -> Pat {
-        Pat::LiteralPat(node)
-    }
-}
-impl From<MacroPat> for Pat {
-    fn from(node: MacroPat) -> Pat {
-        Pat::MacroPat(node)
-    }
-}
-impl std::fmt::Display for Pat {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Pat {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            OR_PAT | PAREN_PAT | REF_PAT | BOX_PAT | BIND_PAT | PLACEHOLDER_PAT | DOT_DOT_PAT
-            | PATH_PAT | RECORD_PAT | TUPLE_STRUCT_PAT | TUPLE_PAT | SLICE_PAT | RANGE_PAT
-            | LITERAL_PAT | MACRO_PAT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        let res = match syntax.kind() {
-            OR_PAT => Pat::OrPat(OrPat { syntax }),
-            PAREN_PAT => Pat::ParenPat(ParenPat { syntax }),
-            REF_PAT => Pat::RefPat(RefPat { syntax }),
-            BOX_PAT => Pat::BoxPat(BoxPat { syntax }),
-            BIND_PAT => Pat::BindPat(BindPat { syntax }),
-            PLACEHOLDER_PAT => Pat::PlaceholderPat(PlaceholderPat { syntax }),
-            DOT_DOT_PAT => Pat::DotDotPat(DotDotPat { syntax }),
-            PATH_PAT => Pat::PathPat(PathPat { syntax }),
-            RECORD_PAT => Pat::RecordPat(RecordPat { syntax }),
-            TUPLE_STRUCT_PAT => Pat::TupleStructPat(TupleStructPat { syntax }),
-            TUPLE_PAT => Pat::TuplePat(TuplePat { syntax }),
-            SLICE_PAT => Pat::SlicePat(SlicePat { syntax }),
-            RANGE_PAT => Pat::RangePat(RangePat { syntax }),
-            LITERAL_PAT => Pat::LiteralPat(LiteralPat { syntax }),
-            MACRO_PAT => Pat::MacroPat(MacroPat { syntax }),
-            _ => return None,
-        };
-        Some(res)
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        match self {
-            Pat::OrPat(it) => &it.syntax,
-            Pat::ParenPat(it) => &it.syntax,
-            Pat::RefPat(it) => &it.syntax,
-            Pat::BoxPat(it) => &it.syntax,
-            Pat::BindPat(it) => &it.syntax,
-            Pat::PlaceholderPat(it) => &it.syntax,
-            Pat::DotDotPat(it) => &it.syntax,
-            Pat::PathPat(it) => &it.syntax,
-            Pat::RecordPat(it) => &it.syntax,
-            Pat::TupleStructPat(it) => &it.syntax,
-            Pat::TuplePat(it) => &it.syntax,
-            Pat::SlicePat(it) => &it.syntax,
-            Pat::RangePat(it) => &it.syntax,
-            Pat::LiteralPat(it) => &it.syntax,
-            Pat::MacroPat(it) => &it.syntax,
-        }
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum AttrInput {
-    Literal(Literal),
-    TokenTree(TokenTree),
-}
-impl From<Literal> for AttrInput {
-    fn from(node: Literal) -> AttrInput {
-        AttrInput::Literal(node)
-    }
-}
-impl From<TokenTree> for AttrInput {
-    fn from(node: TokenTree) -> AttrInput {
-        AttrInput::TokenTree(node)
-    }
-}
-impl std::fmt::Display for AttrInput {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for AttrInput {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            LITERAL | TOKEN_TREE => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        let res = match syntax.kind() {
-            LITERAL => AttrInput::Literal(Literal { syntax }),
-            TOKEN_TREE => AttrInput::TokenTree(TokenTree { syntax }),
-            _ => return None,
-        };
-        Some(res)
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        match self {
-            AttrInput::Literal(it) => &it.syntax,
-            AttrInput::TokenTree(it) => &it.syntax,
-        }
-    }
-}
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum Stmt {
-    ExprStmt(ExprStmt),
-    LetStmt(LetStmt),
-}
-impl From<ExprStmt> for Stmt {
-    fn from(node: ExprStmt) -> Stmt {
-        Stmt::ExprStmt(node)
-    }
-}
-impl From<LetStmt> for Stmt {
-    fn from(node: LetStmt) -> Stmt {
-        Stmt::LetStmt(node)
-    }
-}
-impl std::fmt::Display for Stmt {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        std::fmt::Display::fmt(self.syntax(), f)
-    }
-}
-impl AstNode for Stmt {
-    fn can_cast(kind: SyntaxKind) -> bool {
-        match kind {
-            EXPR_STMT | LET_STMT => true,
-            _ => false,
-        }
-    }
-    fn cast(syntax: SyntaxNode) -> Option<Self> {
-        let res = match syntax.kind() {
-            EXPR_STMT => Stmt::ExprStmt(ExprStmt { syntax }),
-            LET_STMT => Stmt::LetStmt(LetStmt { syntax }),
-            _ => return None,
-        };
-        Some(res)
-    }
-    fn syntax(&self) -> &SyntaxNode {
-        match self {
-            Stmt::ExprStmt(it) => &it.syntax,
-            Stmt::LetStmt(it) => &it.syntax,
-        }
-    }
-}
+#[rustfmt::skip]
+pub(super) mod nodes;
+#[rustfmt::skip]
+pub(super) mod tokens;
diff --git a/crates/ra_syntax/src/ast/generated/nodes.rs b/crates/ra_syntax/src/ast/generated/nodes.rs
new file mode 100644
index 000000000..8b348ad6e
--- /dev/null
+++ b/crates/ra_syntax/src/ast/generated/nodes.rs
@@ -0,0 +1,4177 @@
+//! Generated file, do not edit by hand, see `xtask/src/codegen`
+
+use super::tokens::*;
+use crate::{
+    ast::{self, support, AstChildren, AstNode},
+    SyntaxKind::{self, *},
+    SyntaxNode,
+};
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct SourceFile {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for SourceFile {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SOURCE_FILE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::ModuleItemOwner for SourceFile {}
+impl ast::FnDefOwner for SourceFile {}
+impl ast::AttrsOwner for SourceFile {}
+impl SourceFile {
+    pub fn modules(&self) -> AstChildren<Module> { support::children(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct FnDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for FnDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FN_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for FnDef {}
+impl ast::NameOwner for FnDef {}
+impl ast::TypeParamsOwner for FnDef {}
+impl ast::DocCommentsOwner for FnDef {}
+impl ast::AttrsOwner for FnDef {}
+impl FnDef {
+    pub fn abi(&self) -> Option<Abi> { support::child(&self.syntax) }
+    pub fn const_kw(&self) -> Option<ConstKw> { support::token(&self.syntax) }
+    pub fn default_kw(&self) -> Option<DefaultKw> { support::token(&self.syntax) }
+    pub fn async_kw(&self) -> Option<AsyncKw> { support::token(&self.syntax) }
+    pub fn unsafe_kw(&self) -> Option<UnsafeKw> { support::token(&self.syntax) }
+    pub fn fn_kw(&self) -> Option<FnKw> { support::token(&self.syntax) }
+    pub fn param_list(&self) -> Option<ParamList> { support::child(&self.syntax) }
+    pub fn ret_type(&self) -> Option<RetType> { support::child(&self.syntax) }
+    pub fn body(&self) -> Option<BlockExpr> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RetType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RetType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RET_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl RetType {
+    pub fn thin_arrow(&self) -> Option<ThinArrow> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct StructDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for StructDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == STRUCT_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for StructDef {}
+impl ast::NameOwner for StructDef {}
+impl ast::TypeParamsOwner for StructDef {}
+impl ast::AttrsOwner for StructDef {}
+impl ast::DocCommentsOwner for StructDef {}
+impl StructDef {
+    pub fn struct_kw(&self) -> Option<StructKw> { support::token(&self.syntax) }
+    pub fn field_def_list(&self) -> Option<FieldDefList> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct UnionDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for UnionDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == UNION_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for UnionDef {}
+impl ast::NameOwner for UnionDef {}
+impl ast::TypeParamsOwner for UnionDef {}
+impl ast::AttrsOwner for UnionDef {}
+impl ast::DocCommentsOwner for UnionDef {}
+impl UnionDef {
+    pub fn union_kw(&self) -> Option<UnionKw> { support::token(&self.syntax) }
+    pub fn record_field_def_list(&self) -> Option<RecordFieldDefList> {
+        support::child(&self.syntax)
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RecordFieldDefList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RecordFieldDefList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_FIELD_DEF_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl RecordFieldDefList {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn fields(&self) -> AstChildren<RecordFieldDef> { support::children(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RecordFieldDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RecordFieldDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_FIELD_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for RecordFieldDef {}
+impl ast::NameOwner for RecordFieldDef {}
+impl ast::AttrsOwner for RecordFieldDef {}
+impl ast::DocCommentsOwner for RecordFieldDef {}
+impl ast::TypeAscriptionOwner for RecordFieldDef {}
+impl RecordFieldDef {}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TupleFieldDefList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TupleFieldDefList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TUPLE_FIELD_DEF_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TupleFieldDefList {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn fields(&self) -> AstChildren<TupleFieldDef> { support::children(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TupleFieldDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TupleFieldDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TUPLE_FIELD_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for TupleFieldDef {}
+impl ast::AttrsOwner for TupleFieldDef {}
+impl TupleFieldDef {
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct EnumDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for EnumDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ENUM_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for EnumDef {}
+impl ast::NameOwner for EnumDef {}
+impl ast::TypeParamsOwner for EnumDef {}
+impl ast::AttrsOwner for EnumDef {}
+impl ast::DocCommentsOwner for EnumDef {}
+impl EnumDef {
+    pub fn enum_kw(&self) -> Option<EnumKw> { support::token(&self.syntax) }
+    pub fn variant_list(&self) -> Option<EnumVariantList> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct EnumVariantList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for EnumVariantList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ENUM_VARIANT_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl EnumVariantList {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn variants(&self) -> AstChildren<EnumVariant> { support::children(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct EnumVariant {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for EnumVariant {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ENUM_VARIANT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for EnumVariant {}
+impl ast::NameOwner for EnumVariant {}
+impl ast::DocCommentsOwner for EnumVariant {}
+impl ast::AttrsOwner for EnumVariant {}
+impl EnumVariant {
+    pub fn field_def_list(&self) -> Option<FieldDefList> { support::child(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TraitDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TraitDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TRAIT_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for TraitDef {}
+impl ast::NameOwner for TraitDef {}
+impl ast::AttrsOwner for TraitDef {}
+impl ast::DocCommentsOwner for TraitDef {}
+impl ast::TypeParamsOwner for TraitDef {}
+impl ast::TypeBoundsOwner for TraitDef {}
+impl TraitDef {
+    pub fn unsafe_kw(&self) -> Option<UnsafeKw> { support::token(&self.syntax) }
+    pub fn auto_kw(&self) -> Option<AutoKw> { support::token(&self.syntax) }
+    pub fn trait_kw(&self) -> Option<TraitKw> { support::token(&self.syntax) }
+    pub fn item_list(&self) -> Option<ItemList> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Module {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Module {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MODULE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for Module {}
+impl ast::NameOwner for Module {}
+impl ast::AttrsOwner for Module {}
+impl ast::DocCommentsOwner for Module {}
+impl Module {
+    pub fn mod_kw(&self) -> Option<ModKw> { support::token(&self.syntax) }
+    pub fn item_list(&self) -> Option<ItemList> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ItemList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ItemList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ITEM_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::FnDefOwner for ItemList {}
+impl ast::ModuleItemOwner for ItemList {}
+impl ItemList {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn impl_items(&self) -> AstChildren<ImplItem> { support::children(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ConstDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ConstDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CONST_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for ConstDef {}
+impl ast::NameOwner for ConstDef {}
+impl ast::TypeParamsOwner for ConstDef {}
+impl ast::AttrsOwner for ConstDef {}
+impl ast::DocCommentsOwner for ConstDef {}
+impl ast::TypeAscriptionOwner for ConstDef {}
+impl ConstDef {
+    pub fn default_kw(&self) -> Option<DefaultKw> { support::token(&self.syntax) }
+    pub fn const_kw(&self) -> Option<ConstKw> { support::token(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn body(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct StaticDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for StaticDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == STATIC_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for StaticDef {}
+impl ast::NameOwner for StaticDef {}
+impl ast::TypeParamsOwner for StaticDef {}
+impl ast::AttrsOwner for StaticDef {}
+impl ast::DocCommentsOwner for StaticDef {}
+impl ast::TypeAscriptionOwner for StaticDef {}
+impl StaticDef {
+    pub fn static_kw(&self) -> Option<StaticKw> { support::token(&self.syntax) }
+    pub fn mut_kw(&self) -> Option<MutKw> { support::token(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn body(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TypeAliasDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TypeAliasDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_ALIAS_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::VisibilityOwner for TypeAliasDef {}
+impl ast::NameOwner for TypeAliasDef {}
+impl ast::TypeParamsOwner for TypeAliasDef {}
+impl ast::AttrsOwner for TypeAliasDef {}
+impl ast::DocCommentsOwner for TypeAliasDef {}
+impl ast::TypeBoundsOwner for TypeAliasDef {}
+impl TypeAliasDef {
+    pub fn default_kw(&self) -> Option<DefaultKw> { support::token(&self.syntax) }
+    pub fn type_kw(&self) -> Option<TypeKw> { support::token(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ImplDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ImplDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == IMPL_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::TypeParamsOwner for ImplDef {}
+impl ast::AttrsOwner for ImplDef {}
+impl ImplDef {
+    pub fn default_kw(&self) -> Option<DefaultKw> { support::token(&self.syntax) }
+    pub fn const_kw(&self) -> Option<ConstKw> { support::token(&self.syntax) }
+    pub fn unsafe_kw(&self) -> Option<UnsafeKw> { support::token(&self.syntax) }
+    pub fn impl_kw(&self) -> Option<ImplKw> { support::token(&self.syntax) }
+    pub fn excl(&self) -> Option<Excl> { support::token(&self.syntax) }
+    pub fn for_kw(&self) -> Option<ForKw> { support::token(&self.syntax) }
+    pub fn item_list(&self) -> Option<ItemList> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ParenType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ParenType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PAREN_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ParenType {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TupleType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TupleType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TUPLE_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TupleType {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn fields(&self) -> AstChildren<TypeRef> { support::children(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct NeverType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for NeverType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == NEVER_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl NeverType {
+    pub fn excl(&self) -> Option<Excl> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PathType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for PathType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PATH_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl PathType {
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PointerType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for PointerType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == POINTER_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl PointerType {
+    pub fn star(&self) -> Option<Star> { support::token(&self.syntax) }
+    pub fn const_kw(&self) -> Option<ConstKw> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ArrayType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ArrayType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ARRAY_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ArrayType {
+    pub fn l_brack(&self) -> Option<LBrack> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn r_brack(&self) -> Option<RBrack> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct SliceType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for SliceType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SLICE_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl SliceType {
+    pub fn l_brack(&self) -> Option<LBrack> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+    pub fn r_brack(&self) -> Option<RBrack> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ReferenceType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ReferenceType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == REFERENCE_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ReferenceType {
+    pub fn amp(&self) -> Option<Amp> { support::token(&self.syntax) }
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+    pub fn mut_kw(&self) -> Option<MutKw> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PlaceholderType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for PlaceholderType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PLACEHOLDER_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl PlaceholderType {
+    pub fn underscore(&self) -> Option<Underscore> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct FnPointerType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for FnPointerType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FN_POINTER_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl FnPointerType {
+    pub fn abi(&self) -> Option<Abi> { support::child(&self.syntax) }
+    pub fn unsafe_kw(&self) -> Option<UnsafeKw> { support::token(&self.syntax) }
+    pub fn fn_kw(&self) -> Option<FnKw> { support::token(&self.syntax) }
+    pub fn param_list(&self) -> Option<ParamList> { support::child(&self.syntax) }
+    pub fn ret_type(&self) -> Option<RetType> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ForType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ForType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FOR_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ForType {
+    pub fn for_kw(&self) -> Option<ForKw> { support::token(&self.syntax) }
+    pub fn type_param_list(&self) -> Option<TypeParamList> { support::child(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ImplTraitType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ImplTraitType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == IMPL_TRAIT_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::TypeBoundsOwner for ImplTraitType {}
+impl ImplTraitType {
+    pub fn impl_kw(&self) -> Option<ImplKw> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct DynTraitType {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for DynTraitType {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DYN_TRAIT_TYPE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::TypeBoundsOwner for DynTraitType {}
+impl DynTraitType {
+    pub fn dyn_kw(&self) -> Option<DynKw> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TupleExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TupleExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TUPLE_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for TupleExpr {}
+impl TupleExpr {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn exprs(&self) -> AstChildren<Expr> { support::children(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ArrayExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ArrayExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ARRAY_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for ArrayExpr {}
+impl ArrayExpr {
+    pub fn l_brack(&self) -> Option<LBrack> { support::token(&self.syntax) }
+    pub fn exprs(&self) -> AstChildren<Expr> { support::children(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+    pub fn r_brack(&self) -> Option<RBrack> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ParenExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ParenExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PAREN_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for ParenExpr {}
+impl ParenExpr {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PathExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for PathExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PATH_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl PathExpr {
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LambdaExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for LambdaExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LAMBDA_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for LambdaExpr {}
+impl LambdaExpr {
+    pub fn static_kw(&self) -> Option<StaticKw> { support::token(&self.syntax) }
+    pub fn async_kw(&self) -> Option<AsyncKw> { support::token(&self.syntax) }
+    pub fn move_kw(&self) -> Option<MoveKw> { support::token(&self.syntax) }
+    pub fn param_list(&self) -> Option<ParamList> { support::child(&self.syntax) }
+    pub fn ret_type(&self) -> Option<RetType> { support::child(&self.syntax) }
+    pub fn body(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct IfExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for IfExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == IF_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for IfExpr {}
+impl IfExpr {
+    pub fn if_kw(&self) -> Option<IfKw> { support::token(&self.syntax) }
+    pub fn condition(&self) -> Option<Condition> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LoopExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for LoopExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LOOP_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for LoopExpr {}
+impl ast::LoopBodyOwner for LoopExpr {}
+impl LoopExpr {
+    pub fn loop_kw(&self) -> Option<LoopKw> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TryBlockExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TryBlockExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TRY_BLOCK_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for TryBlockExpr {}
+impl TryBlockExpr {
+    pub fn try_kw(&self) -> Option<TryKw> { support::token(&self.syntax) }
+    pub fn body(&self) -> Option<BlockExpr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ForExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ForExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FOR_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for ForExpr {}
+impl ast::LoopBodyOwner for ForExpr {}
+impl ForExpr {
+    pub fn for_kw(&self) -> Option<ForKw> { support::token(&self.syntax) }
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+    pub fn in_kw(&self) -> Option<InKw> { support::token(&self.syntax) }
+    pub fn iterable(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct WhileExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for WhileExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == WHILE_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for WhileExpr {}
+impl ast::LoopBodyOwner for WhileExpr {}
+impl WhileExpr {
+    pub fn while_kw(&self) -> Option<WhileKw> { support::token(&self.syntax) }
+    pub fn condition(&self) -> Option<Condition> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ContinueExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ContinueExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CONTINUE_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for ContinueExpr {}
+impl ContinueExpr {
+    pub fn continue_kw(&self) -> Option<ContinueKw> { support::token(&self.syntax) }
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BreakExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for BreakExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BREAK_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for BreakExpr {}
+impl BreakExpr {
+    pub fn break_kw(&self) -> Option<BreakKw> { support::token(&self.syntax) }
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Label {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Label {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LABEL }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl Label {
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BlockExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for BlockExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BLOCK_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for BlockExpr {}
+impl BlockExpr {
+    pub fn label(&self) -> Option<Label> { support::child(&self.syntax) }
+    pub fn unsafe_kw(&self) -> Option<UnsafeKw> { support::token(&self.syntax) }
+    pub fn block(&self) -> Option<Block> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ReturnExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ReturnExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RETURN_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for ReturnExpr {}
+impl ReturnExpr {
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct CallExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for CallExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CALL_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::ArgListOwner for CallExpr {}
+impl CallExpr {
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MethodCallExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MethodCallExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == METHOD_CALL_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for MethodCallExpr {}
+impl ast::ArgListOwner for MethodCallExpr {}
+impl MethodCallExpr {
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn dot(&self) -> Option<Dot> { support::token(&self.syntax) }
+    pub fn name_ref(&self) -> Option<NameRef> { support::child(&self.syntax) }
+    pub fn type_arg_list(&self) -> Option<TypeArgList> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct IndexExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for IndexExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == INDEX_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for IndexExpr {}
+impl IndexExpr {
+    pub fn l_brack(&self) -> Option<LBrack> { support::token(&self.syntax) }
+    pub fn r_brack(&self) -> Option<RBrack> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct FieldExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for FieldExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FIELD_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for FieldExpr {}
+impl FieldExpr {
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn dot(&self) -> Option<Dot> { support::token(&self.syntax) }
+    pub fn name_ref(&self) -> Option<NameRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct AwaitExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for AwaitExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == AWAIT_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for AwaitExpr {}
+impl AwaitExpr {
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn dot(&self) -> Option<Dot> { support::token(&self.syntax) }
+    pub fn await_kw(&self) -> Option<AwaitKw> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TryExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TryExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TRY_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for TryExpr {}
+impl TryExpr {
+    pub fn try_kw(&self) -> Option<TryKw> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct CastExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for CastExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CAST_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for CastExpr {}
+impl CastExpr {
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn as_kw(&self) -> Option<AsKw> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RefExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RefExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == REF_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for RefExpr {}
+impl RefExpr {
+    pub fn amp(&self) -> Option<Amp> { support::token(&self.syntax) }
+    pub fn raw_kw(&self) -> Option<RawKw> { support::token(&self.syntax) }
+    pub fn mut_kw(&self) -> Option<MutKw> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PrefixExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for PrefixExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PREFIX_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for PrefixExpr {}
+impl PrefixExpr {
+    pub fn prefix_op(&self) -> Option<PrefixOp> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BoxExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for BoxExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BOX_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for BoxExpr {}
+impl BoxExpr {
+    pub fn box_kw(&self) -> Option<BoxKw> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RangeExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RangeExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RANGE_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for RangeExpr {}
+impl RangeExpr {
+    pub fn range_op(&self) -> Option<RangeOp> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BinExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for BinExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BIN_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for BinExpr {}
+impl BinExpr {
+    pub fn bin_op(&self) -> Option<BinOp> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Literal {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Literal {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LITERAL }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl Literal {
+    pub fn literal_token(&self) -> Option<LiteralToken> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MatchExpr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MatchExpr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MATCH_EXPR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for MatchExpr {}
+impl MatchExpr {
+    pub fn match_kw(&self) -> Option<MatchKw> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn match_arm_list(&self) -> Option<MatchArmList> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MatchArmList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MatchArmList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MATCH_ARM_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for MatchArmList {}
+impl MatchArmList {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn arms(&self) -> AstChildren<MatchArm> { support::children(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MatchArm {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MatchArm {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MATCH_ARM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for MatchArm {}
+impl MatchArm {
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+    pub fn guard(&self) -> Option<MatchGuard> { support::child(&self.syntax) }
+    pub fn fat_arrow(&self) -> Option<FatArrow> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MatchGuard {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MatchGuard {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MATCH_GUARD }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl MatchGuard {
+    pub fn if_kw(&self) -> Option<IfKw> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RecordLit {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RecordLit {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_LIT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl RecordLit {
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+    pub fn record_field_list(&self) -> Option<RecordFieldList> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RecordFieldList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RecordFieldList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_FIELD_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl RecordFieldList {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn fields(&self) -> AstChildren<RecordField> { support::children(&self.syntax) }
+    pub fn dotdot(&self) -> Option<Dotdot> { support::token(&self.syntax) }
+    pub fn spread(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RecordField {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RecordField {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_FIELD }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for RecordField {}
+impl RecordField {
+    pub fn name_ref(&self) -> Option<NameRef> { support::child(&self.syntax) }
+    pub fn colon(&self) -> Option<Colon> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct OrPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for OrPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == OR_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl OrPat {
+    pub fn pats(&self) -> AstChildren<Pat> { support::children(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ParenPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ParenPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PAREN_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ParenPat {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RefPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RefPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == REF_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl RefPat {
+    pub fn amp(&self) -> Option<Amp> { support::token(&self.syntax) }
+    pub fn mut_kw(&self) -> Option<MutKw> { support::token(&self.syntax) }
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BoxPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for BoxPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BOX_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl BoxPat {
+    pub fn box_kw(&self) -> Option<BoxKw> { support::token(&self.syntax) }
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BindPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for BindPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BIND_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for BindPat {}
+impl ast::NameOwner for BindPat {}
+impl BindPat {
+    pub fn ref_kw(&self) -> Option<RefKw> { support::token(&self.syntax) }
+    pub fn mut_kw(&self) -> Option<MutKw> { support::token(&self.syntax) }
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PlaceholderPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for PlaceholderPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PLACEHOLDER_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl PlaceholderPat {
+    pub fn underscore(&self) -> Option<Underscore> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct DotDotPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for DotDotPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DOT_DOT_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl DotDotPat {
+    pub fn dotdot(&self) -> Option<Dotdot> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PathPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for PathPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PATH_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl PathPat {
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct SlicePat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for SlicePat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SLICE_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl SlicePat {
+    pub fn l_brack(&self) -> Option<LBrack> { support::token(&self.syntax) }
+    pub fn args(&self) -> AstChildren<Pat> { support::children(&self.syntax) }
+    pub fn r_brack(&self) -> Option<RBrack> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RangePat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RangePat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RANGE_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl RangePat {
+    pub fn range_separator(&self) -> Option<RangeSeparator> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LiteralPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for LiteralPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LITERAL_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl LiteralPat {
+    pub fn literal(&self) -> Option<Literal> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MacroPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MacroPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MACRO_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl MacroPat {
+    pub fn macro_call(&self) -> Option<MacroCall> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RecordPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RecordPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl RecordPat {
+    pub fn record_field_pat_list(&self) -> Option<RecordFieldPatList> {
+        support::child(&self.syntax)
+    }
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RecordFieldPatList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RecordFieldPatList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_FIELD_PAT_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl RecordFieldPatList {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn pats(&self) -> AstChildren<RecordInnerPat> { support::children(&self.syntax) }
+    pub fn record_field_pats(&self) -> AstChildren<RecordFieldPat> {
+        support::children(&self.syntax)
+    }
+    pub fn bind_pats(&self) -> AstChildren<BindPat> { support::children(&self.syntax) }
+    pub fn dotdot(&self) -> Option<Dotdot> { support::token(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RecordFieldPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for RecordFieldPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_FIELD_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for RecordFieldPat {}
+impl ast::NameOwner for RecordFieldPat {}
+impl RecordFieldPat {
+    pub fn colon(&self) -> Option<Colon> { support::token(&self.syntax) }
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TupleStructPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TupleStructPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TUPLE_STRUCT_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TupleStructPat {
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn args(&self) -> AstChildren<Pat> { support::children(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TuplePat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TuplePat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TUPLE_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TuplePat {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn args(&self) -> AstChildren<Pat> { support::children(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Visibility {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Visibility {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == VISIBILITY }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl Visibility {
+    pub fn pub_kw(&self) -> Option<PubKw> { support::token(&self.syntax) }
+    pub fn super_kw(&self) -> Option<SuperKw> { support::token(&self.syntax) }
+    pub fn self_kw(&self) -> Option<SelfKw> { support::token(&self.syntax) }
+    pub fn crate_kw(&self) -> Option<CrateKw> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Name {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Name {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == NAME }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl Name {
+    pub fn ident(&self) -> Option<Ident> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct NameRef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for NameRef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == NAME_REF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl NameRef {
+    pub fn name_ref_token(&self) -> Option<NameRefToken> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MacroCall {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MacroCall {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MACRO_CALL }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::NameOwner for MacroCall {}
+impl ast::AttrsOwner for MacroCall {}
+impl ast::DocCommentsOwner for MacroCall {}
+impl MacroCall {
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+    pub fn excl(&self) -> Option<Excl> { support::token(&self.syntax) }
+    pub fn token_tree(&self) -> Option<TokenTree> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Attr {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Attr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ATTR }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl Attr {
+    pub fn pound(&self) -> Option<Pound> { support::token(&self.syntax) }
+    pub fn excl(&self) -> Option<Excl> { support::token(&self.syntax) }
+    pub fn l_brack(&self) -> Option<LBrack> { support::token(&self.syntax) }
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn input(&self) -> Option<AttrInput> { support::child(&self.syntax) }
+    pub fn r_brack(&self) -> Option<RBrack> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TokenTree {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TokenTree {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TOKEN_TREE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TokenTree {}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TypeParamList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TypeParamList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_PARAM_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TypeParamList {
+    pub fn l_angle(&self) -> Option<LAngle> { support::token(&self.syntax) }
+    pub fn generic_params(&self) -> AstChildren<GenericParam> { support::children(&self.syntax) }
+    pub fn type_params(&self) -> AstChildren<TypeParam> { support::children(&self.syntax) }
+    pub fn lifetime_params(&self) -> AstChildren<LifetimeParam> { support::children(&self.syntax) }
+    pub fn const_params(&self) -> AstChildren<ConstParam> { support::children(&self.syntax) }
+    pub fn r_angle(&self) -> Option<RAngle> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TypeParam {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TypeParam {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_PARAM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::NameOwner for TypeParam {}
+impl ast::AttrsOwner for TypeParam {}
+impl ast::TypeBoundsOwner for TypeParam {}
+impl TypeParam {
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn default_type(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ConstParam {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ConstParam {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CONST_PARAM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::NameOwner for ConstParam {}
+impl ast::AttrsOwner for ConstParam {}
+impl ast::TypeAscriptionOwner for ConstParam {}
+impl ConstParam {
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn default_val(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LifetimeParam {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for LifetimeParam {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LIFETIME_PARAM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for LifetimeParam {}
+impl LifetimeParam {
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TypeBound {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TypeBound {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_BOUND }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TypeBound {
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+    pub fn const_kw(&self) -> Option<ConstKw> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TypeBoundList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TypeBoundList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_BOUND_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TypeBoundList {
+    pub fn bounds(&self) -> AstChildren<TypeBound> { support::children(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct WherePred {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for WherePred {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == WHERE_PRED }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::TypeBoundsOwner for WherePred {}
+impl WherePred {
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct WhereClause {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for WhereClause {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == WHERE_CLAUSE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl WhereClause {
+    pub fn where_kw(&self) -> Option<WhereKw> { support::token(&self.syntax) }
+    pub fn predicates(&self) -> AstChildren<WherePred> { support::children(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Abi {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Abi {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ABI }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl Abi {
+    pub fn string(&self) -> Option<String> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ExprStmt {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ExprStmt {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EXPR_STMT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for ExprStmt {}
+impl ExprStmt {
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn semi(&self) -> Option<Semi> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LetStmt {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for LetStmt {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LET_STMT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for LetStmt {}
+impl ast::TypeAscriptionOwner for LetStmt {}
+impl LetStmt {
+    pub fn let_kw(&self) -> Option<LetKw> { support::token(&self.syntax) }
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn initializer(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Condition {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Condition {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CONDITION }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl Condition {
+    pub fn let_kw(&self) -> Option<LetKw> { support::token(&self.syntax) }
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Block {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Block {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BLOCK }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for Block {}
+impl ast::ModuleItemOwner for Block {}
+impl Block {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn statements(&self) -> AstChildren<Stmt> { support::children(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ParamList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ParamList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PARAM_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ParamList {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn self_param(&self) -> Option<SelfParam> { support::child(&self.syntax) }
+    pub fn params(&self) -> AstChildren<Param> { support::children(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct SelfParam {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for SelfParam {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SELF_PARAM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::TypeAscriptionOwner for SelfParam {}
+impl ast::AttrsOwner for SelfParam {}
+impl SelfParam {
+    pub fn amp(&self) -> Option<Amp> { support::token(&self.syntax) }
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+    pub fn self_kw(&self) -> Option<SelfKw> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Param {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Param {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PARAM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::TypeAscriptionOwner for Param {}
+impl ast::AttrsOwner for Param {}
+impl Param {
+    pub fn pat(&self) -> Option<Pat> { support::child(&self.syntax) }
+    pub fn dotdotdot(&self) -> Option<Dotdotdot> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct UseItem {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for UseItem {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == USE_ITEM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for UseItem {}
+impl ast::VisibilityOwner for UseItem {}
+impl UseItem {
+    pub fn use_kw(&self) -> Option<UseKw> { support::token(&self.syntax) }
+    pub fn use_tree(&self) -> Option<UseTree> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct UseTree {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for UseTree {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == USE_TREE }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl UseTree {
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+    pub fn star(&self) -> Option<Star> { support::token(&self.syntax) }
+    pub fn use_tree_list(&self) -> Option<UseTreeList> { support::child(&self.syntax) }
+    pub fn alias(&self) -> Option<Alias> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Alias {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Alias {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ALIAS }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::NameOwner for Alias {}
+impl Alias {
+    pub fn as_kw(&self) -> Option<AsKw> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct UseTreeList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for UseTreeList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == USE_TREE_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl UseTreeList {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn use_trees(&self) -> AstChildren<UseTree> { support::children(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ExternCrateItem {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ExternCrateItem {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EXTERN_CRATE_ITEM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::AttrsOwner for ExternCrateItem {}
+impl ast::VisibilityOwner for ExternCrateItem {}
+impl ExternCrateItem {
+    pub fn extern_kw(&self) -> Option<ExternKw> { support::token(&self.syntax) }
+    pub fn crate_kw(&self) -> Option<CrateKw> { support::token(&self.syntax) }
+    pub fn name_ref(&self) -> Option<NameRef> { support::child(&self.syntax) }
+    pub fn alias(&self) -> Option<Alias> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ArgList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ArgList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ARG_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ArgList {
+    pub fn l_paren(&self) -> Option<LParen> { support::token(&self.syntax) }
+    pub fn args(&self) -> AstChildren<Expr> { support::children(&self.syntax) }
+    pub fn r_paren(&self) -> Option<RParen> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Path {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for Path {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PATH }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl Path {
+    pub fn segment(&self) -> Option<PathSegment> { support::child(&self.syntax) }
+    pub fn qualifier(&self) -> Option<Path> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PathSegment {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for PathSegment {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PATH_SEGMENT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl PathSegment {
+    pub fn coloncolon(&self) -> Option<Coloncolon> { support::token(&self.syntax) }
+    pub fn l_angle(&self) -> Option<LAngle> { support::token(&self.syntax) }
+    pub fn name_ref(&self) -> Option<NameRef> { support::child(&self.syntax) }
+    pub fn type_arg_list(&self) -> Option<TypeArgList> { support::child(&self.syntax) }
+    pub fn param_list(&self) -> Option<ParamList> { support::child(&self.syntax) }
+    pub fn ret_type(&self) -> Option<RetType> { support::child(&self.syntax) }
+    pub fn path_type(&self) -> Option<PathType> { support::child(&self.syntax) }
+    pub fn r_angle(&self) -> Option<RAngle> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TypeArgList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TypeArgList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_ARG_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TypeArgList {
+    pub fn coloncolon(&self) -> Option<Coloncolon> { support::token(&self.syntax) }
+    pub fn l_angle(&self) -> Option<LAngle> { support::token(&self.syntax) }
+    pub fn generic_args(&self) -> AstChildren<GenericArg> { support::children(&self.syntax) }
+    pub fn type_args(&self) -> AstChildren<TypeArg> { support::children(&self.syntax) }
+    pub fn lifetime_args(&self) -> AstChildren<LifetimeArg> { support::children(&self.syntax) }
+    pub fn assoc_type_args(&self) -> AstChildren<AssocTypeArg> { support::children(&self.syntax) }
+    pub fn const_args(&self) -> AstChildren<ConstArg> { support::children(&self.syntax) }
+    pub fn r_angle(&self) -> Option<RAngle> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TypeArg {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for TypeArg {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_ARG }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl TypeArg {
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct AssocTypeArg {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for AssocTypeArg {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ASSOC_TYPE_ARG }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::TypeBoundsOwner for AssocTypeArg {}
+impl AssocTypeArg {
+    pub fn name_ref(&self) -> Option<NameRef> { support::child(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LifetimeArg {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for LifetimeArg {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LIFETIME_ARG }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl LifetimeArg {
+    pub fn lifetime(&self) -> Option<Lifetime> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ConstArg {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ConstArg {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CONST_ARG }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ConstArg {
+    pub fn literal(&self) -> Option<Literal> { support::child(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn block_expr(&self) -> Option<BlockExpr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MacroItems {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MacroItems {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MACRO_ITEMS }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::ModuleItemOwner for MacroItems {}
+impl ast::FnDefOwner for MacroItems {}
+impl MacroItems {}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MacroStmts {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MacroStmts {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MACRO_STMTS }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl MacroStmts {
+    pub fn statements(&self) -> AstChildren<Stmt> { support::children(&self.syntax) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ExternItemList {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ExternItemList {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EXTERN_ITEM_LIST }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ast::FnDefOwner for ExternItemList {}
+impl ast::ModuleItemOwner for ExternItemList {}
+impl ExternItemList {
+    pub fn l_curly(&self) -> Option<LCurly> { support::token(&self.syntax) }
+    pub fn extern_items(&self) -> AstChildren<ExternItem> { support::children(&self.syntax) }
+    pub fn r_curly(&self) -> Option<RCurly> { support::token(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ExternBlock {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for ExternBlock {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EXTERN_BLOCK }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl ExternBlock {
+    pub fn abi(&self) -> Option<Abi> { support::child(&self.syntax) }
+    pub fn extern_item_list(&self) -> Option<ExternItemList> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MetaItem {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MetaItem {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == META_ITEM }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl MetaItem {
+    pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
+    pub fn eq(&self) -> Option<Eq> { support::token(&self.syntax) }
+    pub fn attr_input(&self) -> Option<AttrInput> { support::child(&self.syntax) }
+    pub fn nested_meta_items(&self) -> AstChildren<MetaItem> { support::children(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MacroDef {
+    pub(crate) syntax: SyntaxNode,
+}
+impl AstNode for MacroDef {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MACRO_DEF }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
+impl MacroDef {
+    pub fn name(&self) -> Option<Name> { support::child(&self.syntax) }
+    pub fn token_tree(&self) -> Option<TokenTree> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum NominalDef {
+    StructDef(StructDef),
+    EnumDef(EnumDef),
+    UnionDef(UnionDef),
+}
+impl From<StructDef> for NominalDef {
+    fn from(node: StructDef) -> NominalDef { NominalDef::StructDef(node) }
+}
+impl From<EnumDef> for NominalDef {
+    fn from(node: EnumDef) -> NominalDef { NominalDef::EnumDef(node) }
+}
+impl From<UnionDef> for NominalDef {
+    fn from(node: UnionDef) -> NominalDef { NominalDef::UnionDef(node) }
+}
+impl AstNode for NominalDef {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            STRUCT_DEF | ENUM_DEF | UNION_DEF => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            STRUCT_DEF => NominalDef::StructDef(StructDef { syntax }),
+            ENUM_DEF => NominalDef::EnumDef(EnumDef { syntax }),
+            UNION_DEF => NominalDef::UnionDef(UnionDef { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            NominalDef::StructDef(it) => &it.syntax,
+            NominalDef::EnumDef(it) => &it.syntax,
+            NominalDef::UnionDef(it) => &it.syntax,
+        }
+    }
+}
+impl ast::NameOwner for NominalDef {}
+impl ast::TypeParamsOwner for NominalDef {}
+impl ast::AttrsOwner for NominalDef {}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum GenericParam {
+    LifetimeParam(LifetimeParam),
+    TypeParam(TypeParam),
+    ConstParam(ConstParam),
+}
+impl From<LifetimeParam> for GenericParam {
+    fn from(node: LifetimeParam) -> GenericParam { GenericParam::LifetimeParam(node) }
+}
+impl From<TypeParam> for GenericParam {
+    fn from(node: TypeParam) -> GenericParam { GenericParam::TypeParam(node) }
+}
+impl From<ConstParam> for GenericParam {
+    fn from(node: ConstParam) -> GenericParam { GenericParam::ConstParam(node) }
+}
+impl AstNode for GenericParam {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            LIFETIME_PARAM | TYPE_PARAM | CONST_PARAM => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            LIFETIME_PARAM => GenericParam::LifetimeParam(LifetimeParam { syntax }),
+            TYPE_PARAM => GenericParam::TypeParam(TypeParam { syntax }),
+            CONST_PARAM => GenericParam::ConstParam(ConstParam { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            GenericParam::LifetimeParam(it) => &it.syntax,
+            GenericParam::TypeParam(it) => &it.syntax,
+            GenericParam::ConstParam(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum GenericArg {
+    LifetimeArg(LifetimeArg),
+    TypeArg(TypeArg),
+    ConstArg(ConstArg),
+    AssocTypeArg(AssocTypeArg),
+}
+impl From<LifetimeArg> for GenericArg {
+    fn from(node: LifetimeArg) -> GenericArg { GenericArg::LifetimeArg(node) }
+}
+impl From<TypeArg> for GenericArg {
+    fn from(node: TypeArg) -> GenericArg { GenericArg::TypeArg(node) }
+}
+impl From<ConstArg> for GenericArg {
+    fn from(node: ConstArg) -> GenericArg { GenericArg::ConstArg(node) }
+}
+impl From<AssocTypeArg> for GenericArg {
+    fn from(node: AssocTypeArg) -> GenericArg { GenericArg::AssocTypeArg(node) }
+}
+impl AstNode for GenericArg {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            LIFETIME_ARG | TYPE_ARG | CONST_ARG | ASSOC_TYPE_ARG => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            LIFETIME_ARG => GenericArg::LifetimeArg(LifetimeArg { syntax }),
+            TYPE_ARG => GenericArg::TypeArg(TypeArg { syntax }),
+            CONST_ARG => GenericArg::ConstArg(ConstArg { syntax }),
+            ASSOC_TYPE_ARG => GenericArg::AssocTypeArg(AssocTypeArg { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            GenericArg::LifetimeArg(it) => &it.syntax,
+            GenericArg::TypeArg(it) => &it.syntax,
+            GenericArg::ConstArg(it) => &it.syntax,
+            GenericArg::AssocTypeArg(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum TypeRef {
+    ParenType(ParenType),
+    TupleType(TupleType),
+    NeverType(NeverType),
+    PathType(PathType),
+    PointerType(PointerType),
+    ArrayType(ArrayType),
+    SliceType(SliceType),
+    ReferenceType(ReferenceType),
+    PlaceholderType(PlaceholderType),
+    FnPointerType(FnPointerType),
+    ForType(ForType),
+    ImplTraitType(ImplTraitType),
+    DynTraitType(DynTraitType),
+}
+impl From<ParenType> for TypeRef {
+    fn from(node: ParenType) -> TypeRef { TypeRef::ParenType(node) }
+}
+impl From<TupleType> for TypeRef {
+    fn from(node: TupleType) -> TypeRef { TypeRef::TupleType(node) }
+}
+impl From<NeverType> for TypeRef {
+    fn from(node: NeverType) -> TypeRef { TypeRef::NeverType(node) }
+}
+impl From<PathType> for TypeRef {
+    fn from(node: PathType) -> TypeRef { TypeRef::PathType(node) }
+}
+impl From<PointerType> for TypeRef {
+    fn from(node: PointerType) -> TypeRef { TypeRef::PointerType(node) }
+}
+impl From<ArrayType> for TypeRef {
+    fn from(node: ArrayType) -> TypeRef { TypeRef::ArrayType(node) }
+}
+impl From<SliceType> for TypeRef {
+    fn from(node: SliceType) -> TypeRef { TypeRef::SliceType(node) }
+}
+impl From<ReferenceType> for TypeRef {
+    fn from(node: ReferenceType) -> TypeRef { TypeRef::ReferenceType(node) }
+}
+impl From<PlaceholderType> for TypeRef {
+    fn from(node: PlaceholderType) -> TypeRef { TypeRef::PlaceholderType(node) }
+}
+impl From<FnPointerType> for TypeRef {
+    fn from(node: FnPointerType) -> TypeRef { TypeRef::FnPointerType(node) }
+}
+impl From<ForType> for TypeRef {
+    fn from(node: ForType) -> TypeRef { TypeRef::ForType(node) }
+}
+impl From<ImplTraitType> for TypeRef {
+    fn from(node: ImplTraitType) -> TypeRef { TypeRef::ImplTraitType(node) }
+}
+impl From<DynTraitType> for TypeRef {
+    fn from(node: DynTraitType) -> TypeRef { TypeRef::DynTraitType(node) }
+}
+impl AstNode for TypeRef {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            PAREN_TYPE | TUPLE_TYPE | NEVER_TYPE | PATH_TYPE | POINTER_TYPE | ARRAY_TYPE
+            | SLICE_TYPE | REFERENCE_TYPE | PLACEHOLDER_TYPE | FN_POINTER_TYPE | FOR_TYPE
+            | IMPL_TRAIT_TYPE | DYN_TRAIT_TYPE => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            PAREN_TYPE => TypeRef::ParenType(ParenType { syntax }),
+            TUPLE_TYPE => TypeRef::TupleType(TupleType { syntax }),
+            NEVER_TYPE => TypeRef::NeverType(NeverType { syntax }),
+            PATH_TYPE => TypeRef::PathType(PathType { syntax }),
+            POINTER_TYPE => TypeRef::PointerType(PointerType { syntax }),
+            ARRAY_TYPE => TypeRef::ArrayType(ArrayType { syntax }),
+            SLICE_TYPE => TypeRef::SliceType(SliceType { syntax }),
+            REFERENCE_TYPE => TypeRef::ReferenceType(ReferenceType { syntax }),
+            PLACEHOLDER_TYPE => TypeRef::PlaceholderType(PlaceholderType { syntax }),
+            FN_POINTER_TYPE => TypeRef::FnPointerType(FnPointerType { syntax }),
+            FOR_TYPE => TypeRef::ForType(ForType { syntax }),
+            IMPL_TRAIT_TYPE => TypeRef::ImplTraitType(ImplTraitType { syntax }),
+            DYN_TRAIT_TYPE => TypeRef::DynTraitType(DynTraitType { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            TypeRef::ParenType(it) => &it.syntax,
+            TypeRef::TupleType(it) => &it.syntax,
+            TypeRef::NeverType(it) => &it.syntax,
+            TypeRef::PathType(it) => &it.syntax,
+            TypeRef::PointerType(it) => &it.syntax,
+            TypeRef::ArrayType(it) => &it.syntax,
+            TypeRef::SliceType(it) => &it.syntax,
+            TypeRef::ReferenceType(it) => &it.syntax,
+            TypeRef::PlaceholderType(it) => &it.syntax,
+            TypeRef::FnPointerType(it) => &it.syntax,
+            TypeRef::ForType(it) => &it.syntax,
+            TypeRef::ImplTraitType(it) => &it.syntax,
+            TypeRef::DynTraitType(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum ModuleItem {
+    StructDef(StructDef),
+    UnionDef(UnionDef),
+    EnumDef(EnumDef),
+    FnDef(FnDef),
+    TraitDef(TraitDef),
+    TypeAliasDef(TypeAliasDef),
+    ImplDef(ImplDef),
+    UseItem(UseItem),
+    ExternCrateItem(ExternCrateItem),
+    ConstDef(ConstDef),
+    StaticDef(StaticDef),
+    Module(Module),
+    MacroCall(MacroCall),
+    ExternBlock(ExternBlock),
+}
+impl From<StructDef> for ModuleItem {
+    fn from(node: StructDef) -> ModuleItem { ModuleItem::StructDef(node) }
+}
+impl From<UnionDef> for ModuleItem {
+    fn from(node: UnionDef) -> ModuleItem { ModuleItem::UnionDef(node) }
+}
+impl From<EnumDef> for ModuleItem {
+    fn from(node: EnumDef) -> ModuleItem { ModuleItem::EnumDef(node) }
+}
+impl From<FnDef> for ModuleItem {
+    fn from(node: FnDef) -> ModuleItem { ModuleItem::FnDef(node) }
+}
+impl From<TraitDef> for ModuleItem {
+    fn from(node: TraitDef) -> ModuleItem { ModuleItem::TraitDef(node) }
+}
+impl From<TypeAliasDef> for ModuleItem {
+    fn from(node: TypeAliasDef) -> ModuleItem { ModuleItem::TypeAliasDef(node) }
+}
+impl From<ImplDef> for ModuleItem {
+    fn from(node: ImplDef) -> ModuleItem { ModuleItem::ImplDef(node) }
+}
+impl From<UseItem> for ModuleItem {
+    fn from(node: UseItem) -> ModuleItem { ModuleItem::UseItem(node) }
+}
+impl From<ExternCrateItem> for ModuleItem {
+    fn from(node: ExternCrateItem) -> ModuleItem { ModuleItem::ExternCrateItem(node) }
+}
+impl From<ConstDef> for ModuleItem {
+    fn from(node: ConstDef) -> ModuleItem { ModuleItem::ConstDef(node) }
+}
+impl From<StaticDef> for ModuleItem {
+    fn from(node: StaticDef) -> ModuleItem { ModuleItem::StaticDef(node) }
+}
+impl From<Module> for ModuleItem {
+    fn from(node: Module) -> ModuleItem { ModuleItem::Module(node) }
+}
+impl From<MacroCall> for ModuleItem {
+    fn from(node: MacroCall) -> ModuleItem { ModuleItem::MacroCall(node) }
+}
+impl From<ExternBlock> for ModuleItem {
+    fn from(node: ExternBlock) -> ModuleItem { ModuleItem::ExternBlock(node) }
+}
+impl AstNode for ModuleItem {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            STRUCT_DEF | UNION_DEF | ENUM_DEF | FN_DEF | TRAIT_DEF | TYPE_ALIAS_DEF | IMPL_DEF
+            | USE_ITEM | EXTERN_CRATE_ITEM | CONST_DEF | STATIC_DEF | MODULE | MACRO_CALL
+            | EXTERN_BLOCK => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            STRUCT_DEF => ModuleItem::StructDef(StructDef { syntax }),
+            UNION_DEF => ModuleItem::UnionDef(UnionDef { syntax }),
+            ENUM_DEF => ModuleItem::EnumDef(EnumDef { syntax }),
+            FN_DEF => ModuleItem::FnDef(FnDef { syntax }),
+            TRAIT_DEF => ModuleItem::TraitDef(TraitDef { syntax }),
+            TYPE_ALIAS_DEF => ModuleItem::TypeAliasDef(TypeAliasDef { syntax }),
+            IMPL_DEF => ModuleItem::ImplDef(ImplDef { syntax }),
+            USE_ITEM => ModuleItem::UseItem(UseItem { syntax }),
+            EXTERN_CRATE_ITEM => ModuleItem::ExternCrateItem(ExternCrateItem { syntax }),
+            CONST_DEF => ModuleItem::ConstDef(ConstDef { syntax }),
+            STATIC_DEF => ModuleItem::StaticDef(StaticDef { syntax }),
+            MODULE => ModuleItem::Module(Module { syntax }),
+            MACRO_CALL => ModuleItem::MacroCall(MacroCall { syntax }),
+            EXTERN_BLOCK => ModuleItem::ExternBlock(ExternBlock { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            ModuleItem::StructDef(it) => &it.syntax,
+            ModuleItem::UnionDef(it) => &it.syntax,
+            ModuleItem::EnumDef(it) => &it.syntax,
+            ModuleItem::FnDef(it) => &it.syntax,
+            ModuleItem::TraitDef(it) => &it.syntax,
+            ModuleItem::TypeAliasDef(it) => &it.syntax,
+            ModuleItem::ImplDef(it) => &it.syntax,
+            ModuleItem::UseItem(it) => &it.syntax,
+            ModuleItem::ExternCrateItem(it) => &it.syntax,
+            ModuleItem::ConstDef(it) => &it.syntax,
+            ModuleItem::StaticDef(it) => &it.syntax,
+            ModuleItem::Module(it) => &it.syntax,
+            ModuleItem::MacroCall(it) => &it.syntax,
+            ModuleItem::ExternBlock(it) => &it.syntax,
+        }
+    }
+}
+impl ast::NameOwner for ModuleItem {}
+impl ast::AttrsOwner for ModuleItem {}
+impl ast::VisibilityOwner for ModuleItem {}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum ImplItem {
+    FnDef(FnDef),
+    TypeAliasDef(TypeAliasDef),
+    ConstDef(ConstDef),
+}
+impl From<FnDef> for ImplItem {
+    fn from(node: FnDef) -> ImplItem { ImplItem::FnDef(node) }
+}
+impl From<TypeAliasDef> for ImplItem {
+    fn from(node: TypeAliasDef) -> ImplItem { ImplItem::TypeAliasDef(node) }
+}
+impl From<ConstDef> for ImplItem {
+    fn from(node: ConstDef) -> ImplItem { ImplItem::ConstDef(node) }
+}
+impl AstNode for ImplItem {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            FN_DEF | TYPE_ALIAS_DEF | CONST_DEF => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            FN_DEF => ImplItem::FnDef(FnDef { syntax }),
+            TYPE_ALIAS_DEF => ImplItem::TypeAliasDef(TypeAliasDef { syntax }),
+            CONST_DEF => ImplItem::ConstDef(ConstDef { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            ImplItem::FnDef(it) => &it.syntax,
+            ImplItem::TypeAliasDef(it) => &it.syntax,
+            ImplItem::ConstDef(it) => &it.syntax,
+        }
+    }
+}
+impl ast::NameOwner for ImplItem {}
+impl ast::AttrsOwner for ImplItem {}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum ExternItem {
+    FnDef(FnDef),
+    StaticDef(StaticDef),
+}
+impl From<FnDef> for ExternItem {
+    fn from(node: FnDef) -> ExternItem { ExternItem::FnDef(node) }
+}
+impl From<StaticDef> for ExternItem {
+    fn from(node: StaticDef) -> ExternItem { ExternItem::StaticDef(node) }
+}
+impl AstNode for ExternItem {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            FN_DEF | STATIC_DEF => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            FN_DEF => ExternItem::FnDef(FnDef { syntax }),
+            STATIC_DEF => ExternItem::StaticDef(StaticDef { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            ExternItem::FnDef(it) => &it.syntax,
+            ExternItem::StaticDef(it) => &it.syntax,
+        }
+    }
+}
+impl ast::NameOwner for ExternItem {}
+impl ast::AttrsOwner for ExternItem {}
+impl ast::VisibilityOwner for ExternItem {}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum Expr {
+    TupleExpr(TupleExpr),
+    ArrayExpr(ArrayExpr),
+    ParenExpr(ParenExpr),
+    PathExpr(PathExpr),
+    LambdaExpr(LambdaExpr),
+    IfExpr(IfExpr),
+    LoopExpr(LoopExpr),
+    ForExpr(ForExpr),
+    WhileExpr(WhileExpr),
+    ContinueExpr(ContinueExpr),
+    BreakExpr(BreakExpr),
+    Label(Label),
+    BlockExpr(BlockExpr),
+    ReturnExpr(ReturnExpr),
+    MatchExpr(MatchExpr),
+    RecordLit(RecordLit),
+    CallExpr(CallExpr),
+    IndexExpr(IndexExpr),
+    MethodCallExpr(MethodCallExpr),
+    FieldExpr(FieldExpr),
+    AwaitExpr(AwaitExpr),
+    TryExpr(TryExpr),
+    TryBlockExpr(TryBlockExpr),
+    CastExpr(CastExpr),
+    RefExpr(RefExpr),
+    PrefixExpr(PrefixExpr),
+    RangeExpr(RangeExpr),
+    BinExpr(BinExpr),
+    Literal(Literal),
+    MacroCall(MacroCall),
+    BoxExpr(BoxExpr),
+}
+impl From<TupleExpr> for Expr {
+    fn from(node: TupleExpr) -> Expr { Expr::TupleExpr(node) }
+}
+impl From<ArrayExpr> for Expr {
+    fn from(node: ArrayExpr) -> Expr { Expr::ArrayExpr(node) }
+}
+impl From<ParenExpr> for Expr {
+    fn from(node: ParenExpr) -> Expr { Expr::ParenExpr(node) }
+}
+impl From<PathExpr> for Expr {
+    fn from(node: PathExpr) -> Expr { Expr::PathExpr(node) }
+}
+impl From<LambdaExpr> for Expr {
+    fn from(node: LambdaExpr) -> Expr { Expr::LambdaExpr(node) }
+}
+impl From<IfExpr> for Expr {
+    fn from(node: IfExpr) -> Expr { Expr::IfExpr(node) }
+}
+impl From<LoopExpr> for Expr {
+    fn from(node: LoopExpr) -> Expr { Expr::LoopExpr(node) }
+}
+impl From<ForExpr> for Expr {
+    fn from(node: ForExpr) -> Expr { Expr::ForExpr(node) }
+}
+impl From<WhileExpr> for Expr {
+    fn from(node: WhileExpr) -> Expr { Expr::WhileExpr(node) }
+}
+impl From<ContinueExpr> for Expr {
+    fn from(node: ContinueExpr) -> Expr { Expr::ContinueExpr(node) }
+}
+impl From<BreakExpr> for Expr {
+    fn from(node: BreakExpr) -> Expr { Expr::BreakExpr(node) }
+}
+impl From<Label> for Expr {
+    fn from(node: Label) -> Expr { Expr::Label(node) }
+}
+impl From<BlockExpr> for Expr {
+    fn from(node: BlockExpr) -> Expr { Expr::BlockExpr(node) }
+}
+impl From<ReturnExpr> for Expr {
+    fn from(node: ReturnExpr) -> Expr { Expr::ReturnExpr(node) }
+}
+impl From<MatchExpr> for Expr {
+    fn from(node: MatchExpr) -> Expr { Expr::MatchExpr(node) }
+}
+impl From<RecordLit> for Expr {
+    fn from(node: RecordLit) -> Expr { Expr::RecordLit(node) }
+}
+impl From<CallExpr> for Expr {
+    fn from(node: CallExpr) -> Expr { Expr::CallExpr(node) }
+}
+impl From<IndexExpr> for Expr {
+    fn from(node: IndexExpr) -> Expr { Expr::IndexExpr(node) }
+}
+impl From<MethodCallExpr> for Expr {
+    fn from(node: MethodCallExpr) -> Expr { Expr::MethodCallExpr(node) }
+}
+impl From<FieldExpr> for Expr {
+    fn from(node: FieldExpr) -> Expr { Expr::FieldExpr(node) }
+}
+impl From<AwaitExpr> for Expr {
+    fn from(node: AwaitExpr) -> Expr { Expr::AwaitExpr(node) }
+}
+impl From<TryExpr> for Expr {
+    fn from(node: TryExpr) -> Expr { Expr::TryExpr(node) }
+}
+impl From<TryBlockExpr> for Expr {
+    fn from(node: TryBlockExpr) -> Expr { Expr::TryBlockExpr(node) }
+}
+impl From<CastExpr> for Expr {
+    fn from(node: CastExpr) -> Expr { Expr::CastExpr(node) }
+}
+impl From<RefExpr> for Expr {
+    fn from(node: RefExpr) -> Expr { Expr::RefExpr(node) }
+}
+impl From<PrefixExpr> for Expr {
+    fn from(node: PrefixExpr) -> Expr { Expr::PrefixExpr(node) }
+}
+impl From<RangeExpr> for Expr {
+    fn from(node: RangeExpr) -> Expr { Expr::RangeExpr(node) }
+}
+impl From<BinExpr> for Expr {
+    fn from(node: BinExpr) -> Expr { Expr::BinExpr(node) }
+}
+impl From<Literal> for Expr {
+    fn from(node: Literal) -> Expr { Expr::Literal(node) }
+}
+impl From<MacroCall> for Expr {
+    fn from(node: MacroCall) -> Expr { Expr::MacroCall(node) }
+}
+impl From<BoxExpr> for Expr {
+    fn from(node: BoxExpr) -> Expr { Expr::BoxExpr(node) }
+}
+impl AstNode for Expr {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            TUPLE_EXPR | ARRAY_EXPR | PAREN_EXPR | PATH_EXPR | LAMBDA_EXPR | IF_EXPR
+            | LOOP_EXPR | FOR_EXPR | WHILE_EXPR | CONTINUE_EXPR | BREAK_EXPR | LABEL
+            | BLOCK_EXPR | RETURN_EXPR | MATCH_EXPR | RECORD_LIT | CALL_EXPR | INDEX_EXPR
+            | METHOD_CALL_EXPR | FIELD_EXPR | AWAIT_EXPR | TRY_EXPR | TRY_BLOCK_EXPR
+            | CAST_EXPR | REF_EXPR | PREFIX_EXPR | RANGE_EXPR | BIN_EXPR | LITERAL | MACRO_CALL
+            | BOX_EXPR => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            TUPLE_EXPR => Expr::TupleExpr(TupleExpr { syntax }),
+            ARRAY_EXPR => Expr::ArrayExpr(ArrayExpr { syntax }),
+            PAREN_EXPR => Expr::ParenExpr(ParenExpr { syntax }),
+            PATH_EXPR => Expr::PathExpr(PathExpr { syntax }),
+            LAMBDA_EXPR => Expr::LambdaExpr(LambdaExpr { syntax }),
+            IF_EXPR => Expr::IfExpr(IfExpr { syntax }),
+            LOOP_EXPR => Expr::LoopExpr(LoopExpr { syntax }),
+            FOR_EXPR => Expr::ForExpr(ForExpr { syntax }),
+            WHILE_EXPR => Expr::WhileExpr(WhileExpr { syntax }),
+            CONTINUE_EXPR => Expr::ContinueExpr(ContinueExpr { syntax }),
+            BREAK_EXPR => Expr::BreakExpr(BreakExpr { syntax }),
+            LABEL => Expr::Label(Label { syntax }),
+            BLOCK_EXPR => Expr::BlockExpr(BlockExpr { syntax }),
+            RETURN_EXPR => Expr::ReturnExpr(ReturnExpr { syntax }),
+            MATCH_EXPR => Expr::MatchExpr(MatchExpr { syntax }),
+            RECORD_LIT => Expr::RecordLit(RecordLit { syntax }),
+            CALL_EXPR => Expr::CallExpr(CallExpr { syntax }),
+            INDEX_EXPR => Expr::IndexExpr(IndexExpr { syntax }),
+            METHOD_CALL_EXPR => Expr::MethodCallExpr(MethodCallExpr { syntax }),
+            FIELD_EXPR => Expr::FieldExpr(FieldExpr { syntax }),
+            AWAIT_EXPR => Expr::AwaitExpr(AwaitExpr { syntax }),
+            TRY_EXPR => Expr::TryExpr(TryExpr { syntax }),
+            TRY_BLOCK_EXPR => Expr::TryBlockExpr(TryBlockExpr { syntax }),
+            CAST_EXPR => Expr::CastExpr(CastExpr { syntax }),
+            REF_EXPR => Expr::RefExpr(RefExpr { syntax }),
+            PREFIX_EXPR => Expr::PrefixExpr(PrefixExpr { syntax }),
+            RANGE_EXPR => Expr::RangeExpr(RangeExpr { syntax }),
+            BIN_EXPR => Expr::BinExpr(BinExpr { syntax }),
+            LITERAL => Expr::Literal(Literal { syntax }),
+            MACRO_CALL => Expr::MacroCall(MacroCall { syntax }),
+            BOX_EXPR => Expr::BoxExpr(BoxExpr { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            Expr::TupleExpr(it) => &it.syntax,
+            Expr::ArrayExpr(it) => &it.syntax,
+            Expr::ParenExpr(it) => &it.syntax,
+            Expr::PathExpr(it) => &it.syntax,
+            Expr::LambdaExpr(it) => &it.syntax,
+            Expr::IfExpr(it) => &it.syntax,
+            Expr::LoopExpr(it) => &it.syntax,
+            Expr::ForExpr(it) => &it.syntax,
+            Expr::WhileExpr(it) => &it.syntax,
+            Expr::ContinueExpr(it) => &it.syntax,
+            Expr::BreakExpr(it) => &it.syntax,
+            Expr::Label(it) => &it.syntax,
+            Expr::BlockExpr(it) => &it.syntax,
+            Expr::ReturnExpr(it) => &it.syntax,
+            Expr::MatchExpr(it) => &it.syntax,
+            Expr::RecordLit(it) => &it.syntax,
+            Expr::CallExpr(it) => &it.syntax,
+            Expr::IndexExpr(it) => &it.syntax,
+            Expr::MethodCallExpr(it) => &it.syntax,
+            Expr::FieldExpr(it) => &it.syntax,
+            Expr::AwaitExpr(it) => &it.syntax,
+            Expr::TryExpr(it) => &it.syntax,
+            Expr::TryBlockExpr(it) => &it.syntax,
+            Expr::CastExpr(it) => &it.syntax,
+            Expr::RefExpr(it) => &it.syntax,
+            Expr::PrefixExpr(it) => &it.syntax,
+            Expr::RangeExpr(it) => &it.syntax,
+            Expr::BinExpr(it) => &it.syntax,
+            Expr::Literal(it) => &it.syntax,
+            Expr::MacroCall(it) => &it.syntax,
+            Expr::BoxExpr(it) => &it.syntax,
+        }
+    }
+}
+impl ast::AttrsOwner for Expr {}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum Pat {
+    OrPat(OrPat),
+    ParenPat(ParenPat),
+    RefPat(RefPat),
+    BoxPat(BoxPat),
+    BindPat(BindPat),
+    PlaceholderPat(PlaceholderPat),
+    DotDotPat(DotDotPat),
+    PathPat(PathPat),
+    RecordPat(RecordPat),
+    TupleStructPat(TupleStructPat),
+    TuplePat(TuplePat),
+    SlicePat(SlicePat),
+    RangePat(RangePat),
+    LiteralPat(LiteralPat),
+    MacroPat(MacroPat),
+}
+impl From<OrPat> for Pat {
+    fn from(node: OrPat) -> Pat { Pat::OrPat(node) }
+}
+impl From<ParenPat> for Pat {
+    fn from(node: ParenPat) -> Pat { Pat::ParenPat(node) }
+}
+impl From<RefPat> for Pat {
+    fn from(node: RefPat) -> Pat { Pat::RefPat(node) }
+}
+impl From<BoxPat> for Pat {
+    fn from(node: BoxPat) -> Pat { Pat::BoxPat(node) }
+}
+impl From<BindPat> for Pat {
+    fn from(node: BindPat) -> Pat { Pat::BindPat(node) }
+}
+impl From<PlaceholderPat> for Pat {
+    fn from(node: PlaceholderPat) -> Pat { Pat::PlaceholderPat(node) }
+}
+impl From<DotDotPat> for Pat {
+    fn from(node: DotDotPat) -> Pat { Pat::DotDotPat(node) }
+}
+impl From<PathPat> for Pat {
+    fn from(node: PathPat) -> Pat { Pat::PathPat(node) }
+}
+impl From<RecordPat> for Pat {
+    fn from(node: RecordPat) -> Pat { Pat::RecordPat(node) }
+}
+impl From<TupleStructPat> for Pat {
+    fn from(node: TupleStructPat) -> Pat { Pat::TupleStructPat(node) }
+}
+impl From<TuplePat> for Pat {
+    fn from(node: TuplePat) -> Pat { Pat::TuplePat(node) }
+}
+impl From<SlicePat> for Pat {
+    fn from(node: SlicePat) -> Pat { Pat::SlicePat(node) }
+}
+impl From<RangePat> for Pat {
+    fn from(node: RangePat) -> Pat { Pat::RangePat(node) }
+}
+impl From<LiteralPat> for Pat {
+    fn from(node: LiteralPat) -> Pat { Pat::LiteralPat(node) }
+}
+impl From<MacroPat> for Pat {
+    fn from(node: MacroPat) -> Pat { Pat::MacroPat(node) }
+}
+impl AstNode for Pat {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            OR_PAT | PAREN_PAT | REF_PAT | BOX_PAT | BIND_PAT | PLACEHOLDER_PAT | DOT_DOT_PAT
+            | PATH_PAT | RECORD_PAT | TUPLE_STRUCT_PAT | TUPLE_PAT | SLICE_PAT | RANGE_PAT
+            | LITERAL_PAT | MACRO_PAT => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            OR_PAT => Pat::OrPat(OrPat { syntax }),
+            PAREN_PAT => Pat::ParenPat(ParenPat { syntax }),
+            REF_PAT => Pat::RefPat(RefPat { syntax }),
+            BOX_PAT => Pat::BoxPat(BoxPat { syntax }),
+            BIND_PAT => Pat::BindPat(BindPat { syntax }),
+            PLACEHOLDER_PAT => Pat::PlaceholderPat(PlaceholderPat { syntax }),
+            DOT_DOT_PAT => Pat::DotDotPat(DotDotPat { syntax }),
+            PATH_PAT => Pat::PathPat(PathPat { syntax }),
+            RECORD_PAT => Pat::RecordPat(RecordPat { syntax }),
+            TUPLE_STRUCT_PAT => Pat::TupleStructPat(TupleStructPat { syntax }),
+            TUPLE_PAT => Pat::TuplePat(TuplePat { syntax }),
+            SLICE_PAT => Pat::SlicePat(SlicePat { syntax }),
+            RANGE_PAT => Pat::RangePat(RangePat { syntax }),
+            LITERAL_PAT => Pat::LiteralPat(LiteralPat { syntax }),
+            MACRO_PAT => Pat::MacroPat(MacroPat { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            Pat::OrPat(it) => &it.syntax,
+            Pat::ParenPat(it) => &it.syntax,
+            Pat::RefPat(it) => &it.syntax,
+            Pat::BoxPat(it) => &it.syntax,
+            Pat::BindPat(it) => &it.syntax,
+            Pat::PlaceholderPat(it) => &it.syntax,
+            Pat::DotDotPat(it) => &it.syntax,
+            Pat::PathPat(it) => &it.syntax,
+            Pat::RecordPat(it) => &it.syntax,
+            Pat::TupleStructPat(it) => &it.syntax,
+            Pat::TuplePat(it) => &it.syntax,
+            Pat::SlicePat(it) => &it.syntax,
+            Pat::RangePat(it) => &it.syntax,
+            Pat::LiteralPat(it) => &it.syntax,
+            Pat::MacroPat(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum RecordInnerPat {
+    RecordFieldPat(RecordFieldPat),
+    BindPat(BindPat),
+}
+impl From<RecordFieldPat> for RecordInnerPat {
+    fn from(node: RecordFieldPat) -> RecordInnerPat { RecordInnerPat::RecordFieldPat(node) }
+}
+impl From<BindPat> for RecordInnerPat {
+    fn from(node: BindPat) -> RecordInnerPat { RecordInnerPat::BindPat(node) }
+}
+impl AstNode for RecordInnerPat {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            RECORD_FIELD_PAT | BIND_PAT => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            RECORD_FIELD_PAT => RecordInnerPat::RecordFieldPat(RecordFieldPat { syntax }),
+            BIND_PAT => RecordInnerPat::BindPat(BindPat { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            RecordInnerPat::RecordFieldPat(it) => &it.syntax,
+            RecordInnerPat::BindPat(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum AttrInput {
+    Literal(Literal),
+    TokenTree(TokenTree),
+}
+impl From<Literal> for AttrInput {
+    fn from(node: Literal) -> AttrInput { AttrInput::Literal(node) }
+}
+impl From<TokenTree> for AttrInput {
+    fn from(node: TokenTree) -> AttrInput { AttrInput::TokenTree(node) }
+}
+impl AstNode for AttrInput {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            LITERAL | TOKEN_TREE => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            LITERAL => AttrInput::Literal(Literal { syntax }),
+            TOKEN_TREE => AttrInput::TokenTree(TokenTree { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            AttrInput::Literal(it) => &it.syntax,
+            AttrInput::TokenTree(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum Stmt {
+    LetStmt(LetStmt),
+    ExprStmt(ExprStmt),
+}
+impl From<LetStmt> for Stmt {
+    fn from(node: LetStmt) -> Stmt { Stmt::LetStmt(node) }
+}
+impl From<ExprStmt> for Stmt {
+    fn from(node: ExprStmt) -> Stmt { Stmt::ExprStmt(node) }
+}
+impl AstNode for Stmt {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            LET_STMT | EXPR_STMT => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            LET_STMT => Stmt::LetStmt(LetStmt { syntax }),
+            EXPR_STMT => Stmt::ExprStmt(ExprStmt { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            Stmt::LetStmt(it) => &it.syntax,
+            Stmt::ExprStmt(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum FieldDefList {
+    RecordFieldDefList(RecordFieldDefList),
+    TupleFieldDefList(TupleFieldDefList),
+}
+impl From<RecordFieldDefList> for FieldDefList {
+    fn from(node: RecordFieldDefList) -> FieldDefList { FieldDefList::RecordFieldDefList(node) }
+}
+impl From<TupleFieldDefList> for FieldDefList {
+    fn from(node: TupleFieldDefList) -> FieldDefList { FieldDefList::TupleFieldDefList(node) }
+}
+impl AstNode for FieldDefList {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            RECORD_FIELD_DEF_LIST | TUPLE_FIELD_DEF_LIST => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        let res = match syntax.kind() {
+            RECORD_FIELD_DEF_LIST => {
+                FieldDefList::RecordFieldDefList(RecordFieldDefList { syntax })
+            }
+            TUPLE_FIELD_DEF_LIST => FieldDefList::TupleFieldDefList(TupleFieldDefList { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxNode {
+        match self {
+            FieldDefList::RecordFieldDefList(it) => &it.syntax,
+            FieldDefList::TupleFieldDefList(it) => &it.syntax,
+        }
+    }
+}
+impl std::fmt::Display for NominalDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for GenericParam {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for GenericArg {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TypeRef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ModuleItem {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ImplItem {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ExternItem {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Expr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Pat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordInnerPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for AttrInput {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Stmt {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for FieldDefList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for SourceFile {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for FnDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RetType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for StructDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for UnionDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordFieldDefList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordFieldDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TupleFieldDefList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TupleFieldDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for EnumDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for EnumVariantList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for EnumVariant {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TraitDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Module {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ItemList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ConstDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for StaticDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TypeAliasDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ImplDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ParenType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TupleType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for NeverType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for PathType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for PointerType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ArrayType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for SliceType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ReferenceType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for PlaceholderType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for FnPointerType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ForType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ImplTraitType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for DynTraitType {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TupleExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ArrayExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ParenExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for PathExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for LambdaExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for IfExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for LoopExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TryBlockExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ForExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for WhileExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ContinueExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for BreakExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Label {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for BlockExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ReturnExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for CallExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MethodCallExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for IndexExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for FieldExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for AwaitExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TryExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for CastExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RefExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for PrefixExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for BoxExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RangeExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for BinExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Literal {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MatchExpr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MatchArmList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MatchArm {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MatchGuard {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordLit {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordFieldList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordField {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for OrPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ParenPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RefPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for BoxPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for BindPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for PlaceholderPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for DotDotPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for PathPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for SlicePat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RangePat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for LiteralPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MacroPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordFieldPatList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for RecordFieldPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TupleStructPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TuplePat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Visibility {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Name {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for NameRef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MacroCall {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Attr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TokenTree {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TypeParamList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TypeParam {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ConstParam {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for LifetimeParam {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TypeBound {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TypeBoundList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for WherePred {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for WhereClause {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Abi {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ExprStmt {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for LetStmt {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Condition {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Block {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ParamList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for SelfParam {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Param {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for UseItem {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for UseTree {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Alias {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for UseTreeList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ExternCrateItem {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ArgList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for Path {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for PathSegment {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TypeArgList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for TypeArg {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for AssocTypeArg {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for LifetimeArg {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ConstArg {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MacroItems {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MacroStmts {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ExternItemList {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for ExternBlock {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MetaItem {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl std::fmt::Display for MacroDef {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
diff --git a/crates/ra_syntax/src/ast/generated/tokens.rs b/crates/ra_syntax/src/ast/generated/tokens.rs
new file mode 100644
index 000000000..e64b8bce6
--- /dev/null
+++ b/crates/ra_syntax/src/ast/generated/tokens.rs
@@ -0,0 +1,2808 @@
+//! Generated file, do not edit by hand, see `xtask/src/codegen`
+
+use crate::{
+    ast::AstToken,
+    SyntaxKind::{self, *},
+    SyntaxToken,
+};
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Semi {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Semi {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Semi {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SEMI }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Comma {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Comma {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Comma {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == COMMA }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LParen {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for LParen {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for LParen {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == L_PAREN }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RParen {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RParen {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RParen {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == R_PAREN }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LCurly {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for LCurly {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for LCurly {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == L_CURLY }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RCurly {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RCurly {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RCurly {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == R_CURLY }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LBrack {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for LBrack {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for LBrack {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == L_BRACK }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RBrack {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RBrack {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RBrack {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == R_BRACK }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LAngle {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for LAngle {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for LAngle {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == L_ANGLE }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RAngle {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RAngle {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RAngle {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == R_ANGLE }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct At {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for At {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for At {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == AT }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Pound {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Pound {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Pound {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == POUND }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Tilde {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Tilde {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Tilde {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TILDE }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Question {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Question {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Question {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == QUESTION }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Dollar {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Dollar {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Dollar {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DOLLAR }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Amp {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Amp {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Amp {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == AMP }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Pipe {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Pipe {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Pipe {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PIPE }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Plus {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Plus {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Plus {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PLUS }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Star {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Star {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Star {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == STAR }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Slash {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Slash {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Slash {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SLASH }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Caret {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Caret {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Caret {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CARET }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Percent {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Percent {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Percent {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PERCENT }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Underscore {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Underscore {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Underscore {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == UNDERSCORE }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Dot {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Dot {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Dot {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DOT }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Dotdot {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Dotdot {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Dotdot {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DOTDOT }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Dotdotdot {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Dotdotdot {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Dotdotdot {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DOTDOTDOT }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Dotdoteq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Dotdoteq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Dotdoteq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DOTDOTEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Colon {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Colon {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Colon {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == COLON }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Coloncolon {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Coloncolon {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Coloncolon {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == COLONCOLON }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Eq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Eq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Eq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Eqeq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Eqeq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Eqeq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EQEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct FatArrow {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for FatArrow {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for FatArrow {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FAT_ARROW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Excl {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Excl {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Excl {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EXCL }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Neq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Neq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Neq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == NEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Minus {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Minus {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Minus {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MINUS }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ThinArrow {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ThinArrow {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ThinArrow {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == THIN_ARROW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Lteq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Lteq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Lteq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LTEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Gteq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Gteq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Gteq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == GTEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Pluseq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Pluseq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Pluseq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PLUSEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Minuseq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Minuseq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Minuseq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MINUSEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Pipeeq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Pipeeq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Pipeeq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PIPEEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Ampeq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Ampeq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Ampeq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == AMPEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Careteq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Careteq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Careteq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CARETEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Slasheq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Slasheq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Slasheq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SLASHEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Stareq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Stareq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Stareq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == STAREQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Percenteq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Percenteq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Percenteq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PERCENTEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Ampamp {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Ampamp {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Ampamp {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == AMPAMP }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Pipepipe {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Pipepipe {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Pipepipe {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PIPEPIPE }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Shl {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Shl {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Shl {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SHL }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Shr {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Shr {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Shr {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SHR }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Shleq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Shleq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Shleq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SHLEQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Shreq {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Shreq {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Shreq {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SHREQ }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct AsKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for AsKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for AsKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == AS_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct AsyncKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for AsyncKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for AsyncKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ASYNC_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct AwaitKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for AwaitKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for AwaitKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == AWAIT_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BoxKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for BoxKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for BoxKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BOX_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct BreakKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for BreakKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for BreakKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BREAK_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ConstKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ConstKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ConstKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CONST_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ContinueKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ContinueKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ContinueKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CONTINUE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct CrateKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for CrateKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for CrateKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CRATE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct DynKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for DynKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for DynKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DYN_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ElseKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ElseKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ElseKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ELSE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct EnumKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for EnumKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for EnumKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ENUM_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ExternKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ExternKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ExternKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EXTERN_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct FalseKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for FalseKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for FalseKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FALSE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct FnKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for FnKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for FnKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FN_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ForKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ForKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ForKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FOR_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct IfKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for IfKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for IfKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == IF_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ImplKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ImplKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ImplKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == IMPL_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct InKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for InKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for InKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == IN_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LetKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for LetKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for LetKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LET_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LoopKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for LoopKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for LoopKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LOOP_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MacroKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for MacroKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for MacroKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MACRO_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MatchKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for MatchKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for MatchKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MATCH_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ModKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ModKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ModKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MOD_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MoveKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for MoveKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for MoveKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MOVE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MutKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for MutKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for MutKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MUT_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct PubKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for PubKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for PubKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == PUB_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RefKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RefKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RefKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == REF_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ReturnKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ReturnKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ReturnKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RETURN_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct SelfKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for SelfKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for SelfKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SELF_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct StaticKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for StaticKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for StaticKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == STATIC_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct StructKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for StructKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for StructKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == STRUCT_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct SuperKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for SuperKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for SuperKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SUPER_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TraitKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for TraitKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for TraitKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TRAIT_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TrueKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for TrueKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for TrueKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TRUE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TryKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for TryKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for TryKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TRY_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TypeKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for TypeKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for TypeKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == TYPE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct UnsafeKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for UnsafeKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for UnsafeKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == UNSAFE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct UseKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for UseKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for UseKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == USE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct WhereKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for WhereKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for WhereKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == WHERE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct WhileKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for WhileKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for WhileKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == WHILE_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct AutoKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for AutoKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for AutoKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == AUTO_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct DefaultKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for DefaultKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for DefaultKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == DEFAULT_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ExistentialKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ExistentialKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ExistentialKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == EXISTENTIAL_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct UnionKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for UnionKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for UnionKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == UNION_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RawKw {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RawKw {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RawKw {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RAW_KW }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct IntNumber {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for IntNumber {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for IntNumber {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == INT_NUMBER }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct FloatNumber {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for FloatNumber {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for FloatNumber {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FLOAT_NUMBER }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Char {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Char {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Char {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CHAR }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Byte {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Byte {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Byte {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BYTE }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct String {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for String {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for String {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == STRING }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RawString {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RawString {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RawString {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RAW_STRING }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ByteString {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for ByteString {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for ByteString {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BYTE_STRING }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RawByteString {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RawByteString {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RawByteString {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == RAW_BYTE_STRING }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Error {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Error {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == ERROR }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Ident {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Ident {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Ident {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == IDENT }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Whitespace {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Whitespace {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Whitespace {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == WHITESPACE }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Lifetime {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Lifetime {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Lifetime {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == LIFETIME }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Comment {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Comment {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Comment {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == COMMENT }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Shebang {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for Shebang {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for Shebang {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == SHEBANG }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct LDollar {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for LDollar {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for LDollar {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == L_DOLLAR }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct RDollar {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for RDollar {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for RDollar {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == R_DOLLAR }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum LeftDelimiter {
+    LParen(LParen),
+    LBrack(LBrack),
+    LCurly(LCurly),
+}
+impl From<LParen> for LeftDelimiter {
+    fn from(node: LParen) -> LeftDelimiter { LeftDelimiter::LParen(node) }
+}
+impl From<LBrack> for LeftDelimiter {
+    fn from(node: LBrack) -> LeftDelimiter { LeftDelimiter::LBrack(node) }
+}
+impl From<LCurly> for LeftDelimiter {
+    fn from(node: LCurly) -> LeftDelimiter { LeftDelimiter::LCurly(node) }
+}
+impl std::fmt::Display for LeftDelimiter {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl AstToken for LeftDelimiter {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            L_PAREN | L_BRACK | L_CURLY => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        let res = match syntax.kind() {
+            L_PAREN => LeftDelimiter::LParen(LParen { syntax }),
+            L_BRACK => LeftDelimiter::LBrack(LBrack { syntax }),
+            L_CURLY => LeftDelimiter::LCurly(LCurly { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxToken {
+        match self {
+            LeftDelimiter::LParen(it) => &it.syntax,
+            LeftDelimiter::LBrack(it) => &it.syntax,
+            LeftDelimiter::LCurly(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum RightDelimiter {
+    RParen(RParen),
+    RBrack(RBrack),
+    RCurly(RCurly),
+}
+impl From<RParen> for RightDelimiter {
+    fn from(node: RParen) -> RightDelimiter { RightDelimiter::RParen(node) }
+}
+impl From<RBrack> for RightDelimiter {
+    fn from(node: RBrack) -> RightDelimiter { RightDelimiter::RBrack(node) }
+}
+impl From<RCurly> for RightDelimiter {
+    fn from(node: RCurly) -> RightDelimiter { RightDelimiter::RCurly(node) }
+}
+impl std::fmt::Display for RightDelimiter {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl AstToken for RightDelimiter {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            R_PAREN | R_BRACK | R_CURLY => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        let res = match syntax.kind() {
+            R_PAREN => RightDelimiter::RParen(RParen { syntax }),
+            R_BRACK => RightDelimiter::RBrack(RBrack { syntax }),
+            R_CURLY => RightDelimiter::RCurly(RCurly { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxToken {
+        match self {
+            RightDelimiter::RParen(it) => &it.syntax,
+            RightDelimiter::RBrack(it) => &it.syntax,
+            RightDelimiter::RCurly(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum RangeSeparator {
+    Dotdot(Dotdot),
+    Dotdotdot(Dotdotdot),
+    Dotdoteq(Dotdoteq),
+}
+impl From<Dotdot> for RangeSeparator {
+    fn from(node: Dotdot) -> RangeSeparator { RangeSeparator::Dotdot(node) }
+}
+impl From<Dotdotdot> for RangeSeparator {
+    fn from(node: Dotdotdot) -> RangeSeparator { RangeSeparator::Dotdotdot(node) }
+}
+impl From<Dotdoteq> for RangeSeparator {
+    fn from(node: Dotdoteq) -> RangeSeparator { RangeSeparator::Dotdoteq(node) }
+}
+impl std::fmt::Display for RangeSeparator {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl AstToken for RangeSeparator {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            DOTDOT | DOTDOTDOT | DOTDOTEQ => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        let res = match syntax.kind() {
+            DOTDOT => RangeSeparator::Dotdot(Dotdot { syntax }),
+            DOTDOTDOT => RangeSeparator::Dotdotdot(Dotdotdot { syntax }),
+            DOTDOTEQ => RangeSeparator::Dotdoteq(Dotdoteq { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxToken {
+        match self {
+            RangeSeparator::Dotdot(it) => &it.syntax,
+            RangeSeparator::Dotdotdot(it) => &it.syntax,
+            RangeSeparator::Dotdoteq(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum BinOp {
+    Pipepipe(Pipepipe),
+    Ampamp(Ampamp),
+    Eqeq(Eqeq),
+    Neq(Neq),
+    Lteq(Lteq),
+    Gteq(Gteq),
+    LAngle(LAngle),
+    RAngle(RAngle),
+    Plus(Plus),
+    Star(Star),
+    Minus(Minus),
+    Slash(Slash),
+    Percent(Percent),
+    Shl(Shl),
+    Shr(Shr),
+    Caret(Caret),
+    Pipe(Pipe),
+    Amp(Amp),
+    Eq(Eq),
+    Pluseq(Pluseq),
+    Slasheq(Slasheq),
+    Stareq(Stareq),
+    Percenteq(Percenteq),
+    Shreq(Shreq),
+    Shleq(Shleq),
+    Minuseq(Minuseq),
+    Pipeeq(Pipeeq),
+    Ampeq(Ampeq),
+    Careteq(Careteq),
+}
+impl From<Pipepipe> for BinOp {
+    fn from(node: Pipepipe) -> BinOp { BinOp::Pipepipe(node) }
+}
+impl From<Ampamp> for BinOp {
+    fn from(node: Ampamp) -> BinOp { BinOp::Ampamp(node) }
+}
+impl From<Eqeq> for BinOp {
+    fn from(node: Eqeq) -> BinOp { BinOp::Eqeq(node) }
+}
+impl From<Neq> for BinOp {
+    fn from(node: Neq) -> BinOp { BinOp::Neq(node) }
+}
+impl From<Lteq> for BinOp {
+    fn from(node: Lteq) -> BinOp { BinOp::Lteq(node) }
+}
+impl From<Gteq> for BinOp {
+    fn from(node: Gteq) -> BinOp { BinOp::Gteq(node) }
+}
+impl From<LAngle> for BinOp {
+    fn from(node: LAngle) -> BinOp { BinOp::LAngle(node) }
+}
+impl From<RAngle> for BinOp {
+    fn from(node: RAngle) -> BinOp { BinOp::RAngle(node) }
+}
+impl From<Plus> for BinOp {
+    fn from(node: Plus) -> BinOp { BinOp::Plus(node) }
+}
+impl From<Star> for BinOp {
+    fn from(node: Star) -> BinOp { BinOp::Star(node) }
+}
+impl From<Minus> for BinOp {
+    fn from(node: Minus) -> BinOp { BinOp::Minus(node) }
+}
+impl From<Slash> for BinOp {
+    fn from(node: Slash) -> BinOp { BinOp::Slash(node) }
+}
+impl From<Percent> for BinOp {
+    fn from(node: Percent) -> BinOp { BinOp::Percent(node) }
+}
+impl From<Shl> for BinOp {
+    fn from(node: Shl) -> BinOp { BinOp::Shl(node) }
+}
+impl From<Shr> for BinOp {
+    fn from(node: Shr) -> BinOp { BinOp::Shr(node) }
+}
+impl From<Caret> for BinOp {
+    fn from(node: Caret) -> BinOp { BinOp::Caret(node) }
+}
+impl From<Pipe> for BinOp {
+    fn from(node: Pipe) -> BinOp { BinOp::Pipe(node) }
+}
+impl From<Amp> for BinOp {
+    fn from(node: Amp) -> BinOp { BinOp::Amp(node) }
+}
+impl From<Eq> for BinOp {
+    fn from(node: Eq) -> BinOp { BinOp::Eq(node) }
+}
+impl From<Pluseq> for BinOp {
+    fn from(node: Pluseq) -> BinOp { BinOp::Pluseq(node) }
+}
+impl From<Slasheq> for BinOp {
+    fn from(node: Slasheq) -> BinOp { BinOp::Slasheq(node) }
+}
+impl From<Stareq> for BinOp {
+    fn from(node: Stareq) -> BinOp { BinOp::Stareq(node) }
+}
+impl From<Percenteq> for BinOp {
+    fn from(node: Percenteq) -> BinOp { BinOp::Percenteq(node) }
+}
+impl From<Shreq> for BinOp {
+    fn from(node: Shreq) -> BinOp { BinOp::Shreq(node) }
+}
+impl From<Shleq> for BinOp {
+    fn from(node: Shleq) -> BinOp { BinOp::Shleq(node) }
+}
+impl From<Minuseq> for BinOp {
+    fn from(node: Minuseq) -> BinOp { BinOp::Minuseq(node) }
+}
+impl From<Pipeeq> for BinOp {
+    fn from(node: Pipeeq) -> BinOp { BinOp::Pipeeq(node) }
+}
+impl From<Ampeq> for BinOp {
+    fn from(node: Ampeq) -> BinOp { BinOp::Ampeq(node) }
+}
+impl From<Careteq> for BinOp {
+    fn from(node: Careteq) -> BinOp { BinOp::Careteq(node) }
+}
+impl std::fmt::Display for BinOp {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl AstToken for BinOp {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            PIPEPIPE | AMPAMP | EQEQ | NEQ | LTEQ | GTEQ | L_ANGLE | R_ANGLE | PLUS | STAR
+            | MINUS | SLASH | PERCENT | SHL | SHR | CARET | PIPE | AMP | EQ | PLUSEQ | SLASHEQ
+            | STAREQ | PERCENTEQ | SHREQ | SHLEQ | MINUSEQ | PIPEEQ | AMPEQ | CARETEQ => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        let res = match syntax.kind() {
+            PIPEPIPE => BinOp::Pipepipe(Pipepipe { syntax }),
+            AMPAMP => BinOp::Ampamp(Ampamp { syntax }),
+            EQEQ => BinOp::Eqeq(Eqeq { syntax }),
+            NEQ => BinOp::Neq(Neq { syntax }),
+            LTEQ => BinOp::Lteq(Lteq { syntax }),
+            GTEQ => BinOp::Gteq(Gteq { syntax }),
+            L_ANGLE => BinOp::LAngle(LAngle { syntax }),
+            R_ANGLE => BinOp::RAngle(RAngle { syntax }),
+            PLUS => BinOp::Plus(Plus { syntax }),
+            STAR => BinOp::Star(Star { syntax }),
+            MINUS => BinOp::Minus(Minus { syntax }),
+            SLASH => BinOp::Slash(Slash { syntax }),
+            PERCENT => BinOp::Percent(Percent { syntax }),
+            SHL => BinOp::Shl(Shl { syntax }),
+            SHR => BinOp::Shr(Shr { syntax }),
+            CARET => BinOp::Caret(Caret { syntax }),
+            PIPE => BinOp::Pipe(Pipe { syntax }),
+            AMP => BinOp::Amp(Amp { syntax }),
+            EQ => BinOp::Eq(Eq { syntax }),
+            PLUSEQ => BinOp::Pluseq(Pluseq { syntax }),
+            SLASHEQ => BinOp::Slasheq(Slasheq { syntax }),
+            STAREQ => BinOp::Stareq(Stareq { syntax }),
+            PERCENTEQ => BinOp::Percenteq(Percenteq { syntax }),
+            SHREQ => BinOp::Shreq(Shreq { syntax }),
+            SHLEQ => BinOp::Shleq(Shleq { syntax }),
+            MINUSEQ => BinOp::Minuseq(Minuseq { syntax }),
+            PIPEEQ => BinOp::Pipeeq(Pipeeq { syntax }),
+            AMPEQ => BinOp::Ampeq(Ampeq { syntax }),
+            CARETEQ => BinOp::Careteq(Careteq { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxToken {
+        match self {
+            BinOp::Pipepipe(it) => &it.syntax,
+            BinOp::Ampamp(it) => &it.syntax,
+            BinOp::Eqeq(it) => &it.syntax,
+            BinOp::Neq(it) => &it.syntax,
+            BinOp::Lteq(it) => &it.syntax,
+            BinOp::Gteq(it) => &it.syntax,
+            BinOp::LAngle(it) => &it.syntax,
+            BinOp::RAngle(it) => &it.syntax,
+            BinOp::Plus(it) => &it.syntax,
+            BinOp::Star(it) => &it.syntax,
+            BinOp::Minus(it) => &it.syntax,
+            BinOp::Slash(it) => &it.syntax,
+            BinOp::Percent(it) => &it.syntax,
+            BinOp::Shl(it) => &it.syntax,
+            BinOp::Shr(it) => &it.syntax,
+            BinOp::Caret(it) => &it.syntax,
+            BinOp::Pipe(it) => &it.syntax,
+            BinOp::Amp(it) => &it.syntax,
+            BinOp::Eq(it) => &it.syntax,
+            BinOp::Pluseq(it) => &it.syntax,
+            BinOp::Slasheq(it) => &it.syntax,
+            BinOp::Stareq(it) => &it.syntax,
+            BinOp::Percenteq(it) => &it.syntax,
+            BinOp::Shreq(it) => &it.syntax,
+            BinOp::Shleq(it) => &it.syntax,
+            BinOp::Minuseq(it) => &it.syntax,
+            BinOp::Pipeeq(it) => &it.syntax,
+            BinOp::Ampeq(it) => &it.syntax,
+            BinOp::Careteq(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum PrefixOp {
+    Minus(Minus),
+    Excl(Excl),
+    Star(Star),
+}
+impl From<Minus> for PrefixOp {
+    fn from(node: Minus) -> PrefixOp { PrefixOp::Minus(node) }
+}
+impl From<Excl> for PrefixOp {
+    fn from(node: Excl) -> PrefixOp { PrefixOp::Excl(node) }
+}
+impl From<Star> for PrefixOp {
+    fn from(node: Star) -> PrefixOp { PrefixOp::Star(node) }
+}
+impl std::fmt::Display for PrefixOp {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl AstToken for PrefixOp {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            MINUS | EXCL | STAR => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        let res = match syntax.kind() {
+            MINUS => PrefixOp::Minus(Minus { syntax }),
+            EXCL => PrefixOp::Excl(Excl { syntax }),
+            STAR => PrefixOp::Star(Star { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxToken {
+        match self {
+            PrefixOp::Minus(it) => &it.syntax,
+            PrefixOp::Excl(it) => &it.syntax,
+            PrefixOp::Star(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum RangeOp {
+    Dotdot(Dotdot),
+    Dotdoteq(Dotdoteq),
+}
+impl From<Dotdot> for RangeOp {
+    fn from(node: Dotdot) -> RangeOp { RangeOp::Dotdot(node) }
+}
+impl From<Dotdoteq> for RangeOp {
+    fn from(node: Dotdoteq) -> RangeOp { RangeOp::Dotdoteq(node) }
+}
+impl std::fmt::Display for RangeOp {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl AstToken for RangeOp {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            DOTDOT | DOTDOTEQ => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        let res = match syntax.kind() {
+            DOTDOT => RangeOp::Dotdot(Dotdot { syntax }),
+            DOTDOTEQ => RangeOp::Dotdoteq(Dotdoteq { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxToken {
+        match self {
+            RangeOp::Dotdot(it) => &it.syntax,
+            RangeOp::Dotdoteq(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum LiteralToken {
+    IntNumber(IntNumber),
+    FloatNumber(FloatNumber),
+    String(String),
+    RawString(RawString),
+    TrueKw(TrueKw),
+    FalseKw(FalseKw),
+    ByteString(ByteString),
+    RawByteString(RawByteString),
+    Char(Char),
+    Byte(Byte),
+}
+impl From<IntNumber> for LiteralToken {
+    fn from(node: IntNumber) -> LiteralToken { LiteralToken::IntNumber(node) }
+}
+impl From<FloatNumber> for LiteralToken {
+    fn from(node: FloatNumber) -> LiteralToken { LiteralToken::FloatNumber(node) }
+}
+impl From<String> for LiteralToken {
+    fn from(node: String) -> LiteralToken { LiteralToken::String(node) }
+}
+impl From<RawString> for LiteralToken {
+    fn from(node: RawString) -> LiteralToken { LiteralToken::RawString(node) }
+}
+impl From<TrueKw> for LiteralToken {
+    fn from(node: TrueKw) -> LiteralToken { LiteralToken::TrueKw(node) }
+}
+impl From<FalseKw> for LiteralToken {
+    fn from(node: FalseKw) -> LiteralToken { LiteralToken::FalseKw(node) }
+}
+impl From<ByteString> for LiteralToken {
+    fn from(node: ByteString) -> LiteralToken { LiteralToken::ByteString(node) }
+}
+impl From<RawByteString> for LiteralToken {
+    fn from(node: RawByteString) -> LiteralToken { LiteralToken::RawByteString(node) }
+}
+impl From<Char> for LiteralToken {
+    fn from(node: Char) -> LiteralToken { LiteralToken::Char(node) }
+}
+impl From<Byte> for LiteralToken {
+    fn from(node: Byte) -> LiteralToken { LiteralToken::Byte(node) }
+}
+impl std::fmt::Display for LiteralToken {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl AstToken for LiteralToken {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            INT_NUMBER | FLOAT_NUMBER | STRING | RAW_STRING | TRUE_KW | FALSE_KW | BYTE_STRING
+            | RAW_BYTE_STRING | CHAR | BYTE => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        let res = match syntax.kind() {
+            INT_NUMBER => LiteralToken::IntNumber(IntNumber { syntax }),
+            FLOAT_NUMBER => LiteralToken::FloatNumber(FloatNumber { syntax }),
+            STRING => LiteralToken::String(String { syntax }),
+            RAW_STRING => LiteralToken::RawString(RawString { syntax }),
+            TRUE_KW => LiteralToken::TrueKw(TrueKw { syntax }),
+            FALSE_KW => LiteralToken::FalseKw(FalseKw { syntax }),
+            BYTE_STRING => LiteralToken::ByteString(ByteString { syntax }),
+            RAW_BYTE_STRING => LiteralToken::RawByteString(RawByteString { syntax }),
+            CHAR => LiteralToken::Char(Char { syntax }),
+            BYTE => LiteralToken::Byte(Byte { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxToken {
+        match self {
+            LiteralToken::IntNumber(it) => &it.syntax,
+            LiteralToken::FloatNumber(it) => &it.syntax,
+            LiteralToken::String(it) => &it.syntax,
+            LiteralToken::RawString(it) => &it.syntax,
+            LiteralToken::TrueKw(it) => &it.syntax,
+            LiteralToken::FalseKw(it) => &it.syntax,
+            LiteralToken::ByteString(it) => &it.syntax,
+            LiteralToken::RawByteString(it) => &it.syntax,
+            LiteralToken::Char(it) => &it.syntax,
+            LiteralToken::Byte(it) => &it.syntax,
+        }
+    }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum NameRefToken {
+    Ident(Ident),
+    IntNumber(IntNumber),
+}
+impl From<Ident> for NameRefToken {
+    fn from(node: Ident) -> NameRefToken { NameRefToken::Ident(node) }
+}
+impl From<IntNumber> for NameRefToken {
+    fn from(node: IntNumber) -> NameRefToken { NameRefToken::IntNumber(node) }
+}
+impl std::fmt::Display for NameRefToken {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
+impl AstToken for NameRefToken {
+    fn can_cast(kind: SyntaxKind) -> bool {
+        match kind {
+            IDENT | INT_NUMBER => true,
+            _ => false,
+        }
+    }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        let res = match syntax.kind() {
+            IDENT => NameRefToken::Ident(Ident { syntax }),
+            INT_NUMBER => NameRefToken::IntNumber(IntNumber { syntax }),
+            _ => return None,
+        };
+        Some(res)
+    }
+    fn syntax(&self) -> &SyntaxToken {
+        match self {
+            NameRefToken::Ident(it) => &it.syntax,
+            NameRefToken::IntNumber(it) => &it.syntax,
+        }
+    }
+}
diff --git a/crates/ra_syntax/src/ast/traits.rs b/crates/ra_syntax/src/ast/traits.rs
index 576378306..870e83804 100644
--- a/crates/ra_syntax/src/ast/traits.rs
+++ b/crates/ra_syntax/src/ast/traits.rs
@@ -5,7 +5,7 @@
 use itertools::Itertools;
 
 use crate::{
-    ast::{self, child_opt, children, AstChildren, AstNode, AstToken},
+    ast::{self, child_opt, children, support, AstChildren, AstNode, AstToken},
     syntax_node::SyntaxElementChildren,
 };
 
@@ -31,6 +31,10 @@ pub trait LoopBodyOwner: AstNode {
     fn loop_body(&self) -> Option<ast::BlockExpr> {
         child_opt(self)
     }
+
+    fn label(&self) -> Option<ast::Label> {
+        child_opt(self)
+    }
 }
 
 pub trait ArgListOwner: AstNode {
@@ -65,6 +69,10 @@ pub trait TypeBoundsOwner: AstNode {
     fn type_bound_list(&self) -> Option<ast::TypeBoundList> {
         child_opt(self)
     }
+
+    fn colon(&self) -> Option<ast::Colon> {
+        support::token(self.syntax())
+    }
 }
 
 pub trait AttrsOwner: AstNode {
diff --git a/crates/ra_syntax/test_data/parser/ok/0065_plus_after_fn_trait_bound.rast b/crates/ra_syntax/test_data/parser/ok/0065_plus_after_fn_trait_bound.rast
new file mode 100644
index 000000000..1b0acf47c
--- /dev/null
+++ b/crates/ra_syntax/test_data/parser/ok/0065_plus_after_fn_trait_bound.rast
@@ -0,0 +1,61 @@
+SOURCE_FILE@[0; 40)
+  FN_DEF@[0; 39)
+    FN_KW@[0; 2) "fn"
+    WHITESPACE@[2; 3) " "
+    NAME@[3; 4)
+      IDENT@[3; 4) "f"
+    TYPE_PARAM_LIST@[4; 7)
+      L_ANGLE@[4; 5) "<"
+      TYPE_PARAM@[5; 6)
+        NAME@[5; 6)
+          IDENT@[5; 6) "T"
+      R_ANGLE@[6; 7) ">"
+    PARAM_LIST@[7; 9)
+      L_PAREN@[7; 8) "("
+      R_PAREN@[8; 9) ")"
+    WHITESPACE@[9; 10) " "
+    WHERE_CLAUSE@[10; 36)
+      WHERE_KW@[10; 15) "where"
+      WHITESPACE@[15; 16) " "
+      WHERE_PRED@[16; 36)
+        PATH_TYPE@[16; 17)
+          PATH@[16; 17)
+            PATH_SEGMENT@[16; 17)
+              NAME_REF@[16; 17)
+                IDENT@[16; 17) "T"
+        COLON@[17; 18) ":"
+        WHITESPACE@[18; 19) " "
+        TYPE_BOUND_LIST@[19; 36)
+          TYPE_BOUND@[19; 29)
+            PATH_TYPE@[19; 29)
+              PATH@[19; 29)
+                PATH_SEGMENT@[19; 29)
+                  NAME_REF@[19; 21)
+                    IDENT@[19; 21) "Fn"
+                  PARAM_LIST@[21; 23)
+                    L_PAREN@[21; 22) "("
+                    R_PAREN@[22; 23) ")"
+                  WHITESPACE@[23; 24) " "
+                  RET_TYPE@[24; 29)
+                    THIN_ARROW@[24; 26) "->"
+                    WHITESPACE@[26; 27) " "
+                    PATH_TYPE@[27; 29)
+                      PATH@[27; 29)
+                        PATH_SEGMENT@[27; 29)
+                          NAME_REF@[27; 29)
+                            IDENT@[27; 29) "u8"
+          WHITESPACE@[29; 30) " "
+          PLUS@[30; 31) "+"
+          WHITESPACE@[31; 32) " "
+          TYPE_BOUND@[32; 36)
+            PATH_TYPE@[32; 36)
+              PATH@[32; 36)
+                PATH_SEGMENT@[32; 36)
+                  NAME_REF@[32; 36)
+                    IDENT@[32; 36) "Send"
+    WHITESPACE@[36; 37) " "
+    BLOCK_EXPR@[37; 39)
+      BLOCK@[37; 39)
+        L_CURLY@[37; 38) "{"
+        R_CURLY@[38; 39) "}"
+  WHITESPACE@[39; 40) "\n"
diff --git a/crates/ra_syntax/test_data/parser/ok/0065_plus_after_fn_trait_bound.rs b/crates/ra_syntax/test_data/parser/ok/0065_plus_after_fn_trait_bound.rs
new file mode 100644
index 000000000..29f3655e0
--- /dev/null
+++ b/crates/ra_syntax/test_data/parser/ok/0065_plus_after_fn_trait_bound.rs
@@ -0,0 +1 @@
+fn f<T>() where T: Fn() -> u8 + Send {}