feat: add support for feature attributes in struct literal

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

1 files changed, 4177 insertions, 0 deletions

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)
+    }
+}