255 files changed, 2629 insertions, 5124 deletions

diff --git a/Cargo.lock b/Cargo.lock
index f695a7f2c..975c1aef8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -614,9 +614,9 @@ checksum = "ae91b68aebc4ddb91978b11a1b02ddd8602a05ec19002801c5666000e05e0f83"
 
 [[package]]
 name = "lock_api"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79b2de95ecb4691949fea4716ca53cdbcfccb2c612e19644a8bad05edcf9f47b"
+checksum = "c4da24a77a3d8a6d4862d95f72e6fdb9c09a643ecdb402d754004a557f2bec75"
 dependencies = [
  "scopeguard",
 ]
@@ -779,9 +779,9 @@ checksum = "a86ed3f5f244b372d6b1a00b72ef7f8876d0bc6a78a4c9985c53614041512063"
 
 [[package]]
 name = "parking_lot"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92e98c49ab0b7ce5b222f2cc9193fc4efe11c6d0bd4f648e374684a6857b1cfc"
+checksum = "6fdfcb5f20930a79e326f7ec992a9fdb5b7bd809254b1e735bdd5a99f78bee0d"
 dependencies = [
  "lock_api",
  "parking_lot_core",
@@ -789,9 +789,9 @@ dependencies = [
 
 [[package]]
 name = "parking_lot_core"
-version = "0.7.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7582838484df45743c8434fbff785e8edf260c28748353d44bc0da32e0ceabf1"
+checksum = "0e136c1904604defe99ce5fd71a28d473fa60a12255d511aa78a9ddf11237aeb"
 dependencies = [
  "cfg-if",
  "cloudabi",
@@ -1021,6 +1021,7 @@ dependencies = [
  "ra_prof",
  "ra_syntax",
  "rustc-hash",
+ "scoped-tls",
  "smallvec",
  "stdx",
  "test_utils",
@@ -1420,6 +1421,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "scoped-tls"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea6a9290e3c9cf0f18145ef7ffa62d68ee0bf5fcd651017e586dc7fd5da448c2"
+
+[[package]]
 name = "scopeguard"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1523,9 +1530,9 @@ checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 
 [[package]]
 name = "smallvec"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c2fb2ec9bcd216a5b0d0ccf31ab17b5ed1d627960edff65bbe95d3ce221cefc"
+checksum = "05720e22615919e4734f6a99ceae50d00226c3c5aca406e102ebc33298214e0a"
 
 [[package]]
 name = "smol_str"
@@ -1573,9 +1580,9 @@ dependencies = [
 
 [[package]]
 name = "termios"
-version = "0.3.1"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b620c5ea021d75a735c943269bb07d30c9b77d6ac6b236bc8b5c496ef05625"
+checksum = "6f0fcee7b24a25675de40d5bb4de6e41b0df07bc9856295e7e2b3a3600c400c2"
 dependencies = [
  "libc",
 ]
diff --git a/crates/ra_assists/src/handlers/add_explicit_type.rs b/crates/ra_assists/src/handlers/add_explicit_type.rs
index e7dcfb44e..d86d804b2 100644
--- a/crates/ra_assists/src/handlers/add_explicit_type.rs
+++ b/crates/ra_assists/src/handlers/add_explicit_type.rs
@@ -1,6 +1,6 @@
 use hir::HirDisplay;
 use ra_syntax::{
-    ast::{self, AstNode, AstToken, LetStmt, NameOwner, TypeAscriptionOwner},
+    ast::{self, AstNode, LetStmt, NameOwner, TypeAscriptionOwner},
     TextRange,
 };
 
@@ -35,7 +35,7 @@ pub(crate) fn add_explicit_type(ctx: AssistCtx) -> Option<Assist> {
     let name = pat.name()?;
     let name_range = name.syntax().text_range();
     let stmt_range = stmt.syntax().text_range();
-    let eq_range = stmt.eq_token()?.syntax().text_range();
+    let eq_range = stmt.eq_token()?.text_range();
     // Assist should only be applicable if cursor is between 'let' and '='
     let let_range = TextRange::from_to(stmt_range.start(), eq_range.start());
     let cursor_in_range = ctx.frange.range.is_subrange(&let_range);
diff --git a/crates/ra_assists/src/handlers/add_impl.rs b/crates/ra_assists/src/handlers/add_impl.rs
index 26dfed237..6622eadb2 100644
--- a/crates/ra_assists/src/handlers/add_impl.rs
+++ b/crates/ra_assists/src/handlers/add_impl.rs
@@ -1,5 +1,5 @@
 use ra_syntax::{
-    ast::{self, AstNode, AstToken, NameOwner, TypeParamsOwner},
+    ast::{self, AstNode, NameOwner, TypeParamsOwner},
     TextUnit,
 };
 use stdx::{format_to, SepBy};
diff --git a/crates/ra_assists/src/handlers/add_new.rs b/crates/ra_assists/src/handlers/add_new.rs
index 30360af94..240b19fa3 100644
--- a/crates/ra_assists/src/handlers/add_new.rs
+++ b/crates/ra_assists/src/handlers/add_new.rs
@@ -1,8 +1,7 @@
 use hir::Adt;
 use ra_syntax::{
     ast::{
-        self, AstNode, AstToken, NameOwner, StructKind, TypeAscriptionOwner, TypeParamsOwner,
-        VisibilityOwner,
+        self, AstNode, NameOwner, StructKind, TypeAscriptionOwner, TypeParamsOwner, VisibilityOwner,
     },
     TextUnit, T,
 };
diff --git a/crates/ra_assists/src/handlers/inline_local_variable.rs b/crates/ra_assists/src/handlers/inline_local_variable.rs
index b9eb09676..c4fb425b0 100644
--- a/crates/ra_assists/src/handlers/inline_local_variable.rs
+++ b/crates/ra_assists/src/handlers/inline_local_variable.rs
@@ -29,7 +29,7 @@ pub(crate) fn inline_local_variable(ctx: AssistCtx) -> Option<Assist> {
         ast::Pat::BindPat(pat) => pat,
         _ => return None,
     };
-    if bind_pat.mut_kw_token().is_some() {
+    if bind_pat.mut_token().is_some() {
         tested_by!(test_not_inline_mut_variable);
         return None;
     }
diff --git a/crates/ra_assists/src/handlers/introduce_variable.rs b/crates/ra_assists/src/handlers/introduce_variable.rs
index ab6bdf6bb..8d0f7e922 100644
--- a/crates/ra_assists/src/handlers/introduce_variable.rs
+++ b/crates/ra_assists/src/handlers/introduce_variable.rs
@@ -61,7 +61,7 @@ pub(crate) fn introduce_variable(ctx: AssistCtx) -> Option<Assist> {
         };
         if is_full_stmt {
             tested_by!(test_introduce_var_expr_stmt);
-            if full_stmt.unwrap().semi_token().is_none() {
+            if full_stmt.unwrap().semicolon_token().is_none() {
                 buf.push_str(";");
             }
             edit.replace(expr.syntax().text_range(), buf);
diff --git a/crates/ra_assists/src/handlers/merge_imports.rs b/crates/ra_assists/src/handlers/merge_imports.rs
index 936d50ab4..0958f52f1 100644
--- a/crates/ra_assists/src/handlers/merge_imports.rs
+++ b/crates/ra_assists/src/handlers/merge_imports.rs
@@ -3,7 +3,7 @@ use std::iter::successors;
 use ra_syntax::{
     algo::{neighbor, SyntaxRewriter},
     ast::{self, edit::AstNodeEdit, make},
-    AstNode, AstToken, Direction, InsertPosition, SyntaxElement, T,
+    AstNode, Direction, InsertPosition, SyntaxElement, T,
 };
 
 use crate::{Assist, AssistCtx, AssistId};
@@ -82,7 +82,7 @@ fn try_merge_trees(old: &ast::UseTree, new: &ast::UseTree) -> Option<ast::UseTre
             .filter(|it| it.kind() != T!['{'] && it.kind() != T!['}']),
     );
     let use_tree_list = lhs.use_tree_list()?;
-    let pos = InsertPosition::Before(use_tree_list.r_curly_token()?.syntax().clone().into());
+    let pos = InsertPosition::Before(use_tree_list.r_curly_token()?.into());
     let use_tree_list = use_tree_list.insert_children(pos, to_insert);
     Some(lhs.with_use_tree_list(use_tree_list))
 }
diff --git a/crates/ra_assists/src/handlers/move_bounds.rs b/crates/ra_assists/src/handlers/move_bounds.rs
index 93f26f51a..0f26884dc 100644
--- a/crates/ra_assists/src/handlers/move_bounds.rs
+++ b/crates/ra_assists/src/handlers/move_bounds.rs
@@ -2,6 +2,7 @@ use ra_syntax::{
     ast::{self, edit::AstNodeEdit, make, AstNode, NameOwner, TypeBoundsOwner},
     match_ast,
     SyntaxKind::*,
+    T,
 };
 
 use crate::{Assist, AssistCtx, AssistId};
@@ -42,7 +43,7 @@ pub(crate) fn move_bounds_to_where_clause(ctx: AssistCtx) -> Option<Assist> {
             ast::EnumDef(it) => it.variant_list()?.syntax().clone().into(),
             ast::StructDef(it) => {
                 it.syntax().children_with_tokens()
-                    .find(|it| it.kind() == RECORD_FIELD_DEF_LIST || it.kind() == SEMI)?
+                    .find(|it| it.kind() == RECORD_FIELD_DEF_LIST || it.kind() == T![;])?
             },
             _ => return None
         }
diff --git a/crates/ra_hir/src/source_analyzer.rs b/crates/ra_hir/src/source_analyzer.rs
index 45631f8fd..226fb4534 100644
--- a/crates/ra_hir/src/source_analyzer.rs
+++ b/crates/ra_hir/src/source_analyzer.rs
@@ -255,7 +255,7 @@ impl SourceAnalyzer {
             _ => return None,
         };
 
-        let (variant, missing_fields) =
+        let (variant, missing_fields, _exhaustive) =
             record_pattern_missing_fields(db, infer, pat_id, &body[pat_id])?;
         let res = self.missing_fields(db, krate, substs, variant, missing_fields);
         Some(res)
diff --git a/crates/ra_hir_def/src/adt.rs b/crates/ra_hir_def/src/adt.rs
index 7fc4cd76e..be4b0accb 100644
--- a/crates/ra_hir_def/src/adt.rs
+++ b/crates/ra_hir_def/src/adt.rs
@@ -4,6 +4,7 @@ use std::sync::Arc;
 
 use either::Either;
 use hir_expand::{
+    hygiene::Hygiene,
     name::{AsName, Name},
     InFile,
 };
@@ -12,9 +13,9 @@ use ra_prof::profile;
 use ra_syntax::ast::{self, NameOwner, TypeAscriptionOwner, VisibilityOwner};
 
 use crate::{
-    db::DefDatabase, src::HasChildSource, src::HasSource, trace::Trace, type_ref::TypeRef,
-    visibility::RawVisibility, EnumId, LocalEnumVariantId, LocalStructFieldId, Lookup, StructId,
-    UnionId, VariantId,
+    attr::Attrs, db::DefDatabase, src::HasChildSource, src::HasSource, trace::Trace,
+    type_ref::TypeRef, visibility::RawVisibility, EnumId, HasModule, LocalEnumVariantId,
+    LocalStructFieldId, Lookup, ModuleId, StructId, UnionId, VariantId,
 };
 
 /// Note that we use `StructData` for unions as well!
@@ -56,7 +57,8 @@ impl StructData {
         let src = id.lookup(db).source(db);
 
         let name = src.value.name().map_or_else(Name::missing, |n| n.as_name());
-        let variant_data = VariantData::new(db, src.map(|s| s.kind()));
+        let variant_data =
+            VariantData::new(db, src.map(|s| s.kind()), id.lookup(db).container.module(db));
         let variant_data = Arc::new(variant_data);
         Arc::new(StructData { name, variant_data })
     }
@@ -70,6 +72,7 @@ impl StructData {
                     .map(ast::StructKind::Record)
                     .unwrap_or(ast::StructKind::Unit)
             }),
+            id.lookup(db).container.module(db),
         );
         let variant_data = Arc::new(variant_data);
         Arc::new(StructData { name, variant_data })
@@ -82,7 +85,7 @@ impl EnumData {
         let src = e.lookup(db).source(db);
         let name = src.value.name().map_or_else(Name::missing, |n| n.as_name());
         let mut trace = Trace::new_for_arena();
-        lower_enum(db, &mut trace, &src);
+        lower_enum(db, &mut trace, &src, e.lookup(db).container.module(db));
         Arc::new(EnumData { name, variants: trace.into_arena() })
     }
 
@@ -98,7 +101,7 @@ impl HasChildSource for EnumId {
     fn child_source(&self, db: &dyn DefDatabase) -> InFile<ArenaMap<Self::ChildId, Self::Value>> {
         let src = self.lookup(db).source(db);
         let mut trace = Trace::new_for_map();
-        lower_enum(db, &mut trace, &src);
+        lower_enum(db, &mut trace, &src, self.lookup(db).container.module(db));
         src.with_value(trace.into_map())
     }
 }
@@ -107,22 +110,23 @@ fn lower_enum(
     db: &dyn DefDatabase,
     trace: &mut Trace<EnumVariantData, ast::EnumVariant>,
     ast: &InFile<ast::EnumDef>,
+    module_id: ModuleId,
 ) {
     for var in ast.value.variant_list().into_iter().flat_map(|it| it.variants()) {
         trace.alloc(
             || var.clone(),
             || EnumVariantData {
                 name: var.name().map_or_else(Name::missing, |it| it.as_name()),
-                variant_data: Arc::new(VariantData::new(db, ast.with_value(var.kind()))),
+                variant_data: Arc::new(VariantData::new(db, ast.with_value(var.kind()), module_id)),
             },
         );
     }
 }
 
 impl VariantData {
-    fn new(db: &dyn DefDatabase, flavor: InFile<ast::StructKind>) -> Self {
+    fn new(db: &dyn DefDatabase, flavor: InFile<ast::StructKind>, module_id: ModuleId) -> Self {
         let mut trace = Trace::new_for_arena();
-        match lower_struct(db, &mut trace, &flavor) {
+        match lower_struct(db, &mut trace, &flavor, module_id) {
             StructKind::Tuple => VariantData::Tuple(trace.into_arena()),
             StructKind::Record => VariantData::Record(trace.into_arena()),
             StructKind::Unit => VariantData::Unit,
@@ -155,22 +159,27 @@ impl HasChildSource for VariantId {
     type Value = Either<ast::TupleFieldDef, ast::RecordFieldDef>;
 
     fn child_source(&self, db: &dyn DefDatabase) -> InFile<ArenaMap<Self::ChildId, Self::Value>> {
-        let src = match self {
+        let (src, module_id) = match self {
             VariantId::EnumVariantId(it) => {
                 // I don't really like the fact that we call into parent source
                 // here, this might add to more queries then necessary.
                 let src = it.parent.child_source(db);
-                src.map(|map| map[it.local_id].kind())
+                (src.map(|map| map[it.local_id].kind()), it.parent.lookup(db).container.module(db))
             }
-            VariantId::StructId(it) => it.lookup(db).source(db).map(|it| it.kind()),
-            VariantId::UnionId(it) => it.lookup(db).source(db).map(|it| {
-                it.record_field_def_list()
-                    .map(ast::StructKind::Record)
-                    .unwrap_or(ast::StructKind::Unit)
-            }),
+            VariantId::StructId(it) => {
+                (it.lookup(db).source(db).map(|it| it.kind()), it.lookup(db).container.module(db))
+            }
+            VariantId::UnionId(it) => (
+                it.lookup(db).source(db).map(|it| {
+                    it.record_field_def_list()
+                        .map(ast::StructKind::Record)
+                        .unwrap_or(ast::StructKind::Unit)
+                }),
+                it.lookup(db).container.module(db),
+            ),
         };
         let mut trace = Trace::new_for_map();
-        lower_struct(db, &mut trace, &src);
+        lower_struct(db, &mut trace, &src, module_id);
         src.with_value(trace.into_map())
     }
 }
@@ -186,10 +195,17 @@ fn lower_struct(
     db: &dyn DefDatabase,
     trace: &mut Trace<StructFieldData, Either<ast::TupleFieldDef, ast::RecordFieldDef>>,
     ast: &InFile<ast::StructKind>,
+    module_id: ModuleId,
 ) -> StructKind {
+    let crate_graph = db.crate_graph();
     match &ast.value {
         ast::StructKind::Tuple(fl) => {
             for (i, fd) in fl.fields().enumerate() {
+                let attrs = Attrs::new(&fd, &Hygiene::new(db.upcast(), ast.file_id));
+                if !attrs.is_cfg_enabled(&crate_graph[module_id.krate].cfg_options) {
+                    continue;
+                }
+
                 trace.alloc(
                     || Either::Left(fd.clone()),
                     || StructFieldData {
@@ -203,6 +219,11 @@ fn lower_struct(
         }
         ast::StructKind::Record(fl) => {
             for fd in fl.fields() {
+                let attrs = Attrs::new(&fd, &Hygiene::new(db.upcast(), ast.file_id));
+                if !attrs.is_cfg_enabled(&crate_graph[module_id.krate].cfg_options) {
+                    continue;
+                }
+
                 trace.alloc(
                     || Either::Right(fd.clone()),
                     || StructFieldData {
diff --git a/crates/ra_hir_def/src/attr.rs b/crates/ra_hir_def/src/attr.rs
index 71a18f5e1..7b0c506b1 100644
--- a/crates/ra_hir_def/src/attr.rs
+++ b/crates/ra_hir_def/src/attr.rs
@@ -5,6 +5,7 @@ use std::{ops, sync::Arc};
 use either::Either;
 use hir_expand::{hygiene::Hygiene, AstId, InFile};
 use mbe::ast_to_token_tree;
+use ra_cfg::CfgOptions;
 use ra_syntax::{
     ast::{self, AstNode, AttrsOwner},
     SmolStr,
@@ -90,6 +91,10 @@ impl Attrs {
     pub fn by_key(&self, key: &'static str) -> AttrQuery<'_> {
         AttrQuery { attrs: self, key }
     }
+
+    pub(crate) fn is_cfg_enabled(&self, cfg_options: &CfgOptions) -> bool {
+        self.by_key("cfg").tt_values().all(|tt| cfg_options.is_cfg_enabled(tt) != Some(false))
+    }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
diff --git a/crates/ra_hir_def/src/body.rs b/crates/ra_hir_def/src/body.rs
index 5f9d53ecb..e09996c6f 100644
--- a/crates/ra_hir_def/src/body.rs
+++ b/crates/ra_hir_def/src/body.rs
@@ -236,7 +236,7 @@ impl Index<PatId> for Body {
 
 impl BodySourceMap {
     pub fn expr_syntax(&self, expr: ExprId) -> Result<ExprSource, SyntheticSyntax> {
-        self.expr_map_back[expr]
+        self.expr_map_back[expr].clone()
     }
 
     pub fn node_expr(&self, node: InFile<&ast::Expr>) -> Option<ExprId> {
@@ -255,7 +255,7 @@ impl BodySourceMap {
     }
 
     pub fn pat_syntax(&self, pat: PatId) -> Result<PatSource, SyntheticSyntax> {
-        self.pat_map_back[pat]
+        self.pat_map_back[pat].clone()
     }
 
     pub fn node_pat(&self, node: InFile<&ast::Pat>) -> Option<PatId> {
@@ -264,6 +264,6 @@ impl BodySourceMap {
     }
 
     pub fn field_syntax(&self, expr: ExprId, field: usize) -> AstPtr<ast::RecordField> {
-        self.field_map[&(expr, field)]
+        self.field_map[&(expr, field)].clone()
     }
 }
diff --git a/crates/ra_hir_def/src/body/lower.rs b/crates/ra_hir_def/src/body/lower.rs
index c4a5ec59c..9d6ee095e 100644
--- a/crates/ra_hir_def/src/body/lower.rs
+++ b/crates/ra_hir_def/src/body/lower.rs
@@ -4,6 +4,7 @@
 use either::Either;
 
 use hir_expand::{
+    hygiene::Hygiene,
     name::{name, AsName, Name},
     MacroDefId, MacroDefKind,
 };
@@ -20,6 +21,7 @@ use test_utils::tested_by;
 use super::{ExprSource, PatSource};
 use crate::{
     adt::StructKind,
+    attr::Attrs,
     body::{Body, BodySourceMap, Expander, PatPtr, SyntheticSyntax},
     builtin_type::{BuiltinFloat, BuiltinInt},
     db::DefDatabase,
@@ -31,8 +33,8 @@ use crate::{
     path::GenericArgs,
     path::Path,
     type_ref::{Mutability, TypeRef},
-    AdtId, ConstLoc, ContainerId, DefWithBodyId, EnumLoc, FunctionLoc, Intern, ModuleDefId,
-    StaticLoc, StructLoc, TraitLoc, TypeAliasLoc, UnionLoc,
+    AdtId, ConstLoc, ContainerId, DefWithBodyId, EnumLoc, FunctionLoc, HasModule, Intern,
+    ModuleDefId, StaticLoc, StructLoc, TraitLoc, TypeAliasLoc, UnionLoc,
 };
 
 pub(super) fn lower(
@@ -104,7 +106,7 @@ impl ExprCollector<'_> {
     fn alloc_expr(&mut self, expr: Expr, ptr: AstPtr<ast::Expr>) -> ExprId {
         let ptr = Either::Left(ptr);
         let src = self.expander.to_source(ptr);
-        let id = self.make_expr(expr, Ok(src));
+        let id = self.make_expr(expr, Ok(src.clone()));
         self.source_map.expr_map.insert(src, id);
         id
     }
@@ -116,7 +118,7 @@ impl ExprCollector<'_> {
     fn alloc_expr_field_shorthand(&mut self, expr: Expr, ptr: AstPtr<ast::RecordField>) -> ExprId {
         let ptr = Either::Right(ptr);
         let src = self.expander.to_source(ptr);
-        let id = self.make_expr(expr, Ok(src));
+        let id = self.make_expr(expr, Ok(src.clone()));
         self.source_map.expr_map.insert(src, id);
         id
     }
@@ -134,7 +136,7 @@ impl ExprCollector<'_> {
 
     fn alloc_pat(&mut self, pat: Pat, ptr: PatPtr) -> PatId {
         let src = self.expander.to_source(ptr);
-        let id = self.make_pat(pat, Ok(src));
+        let id = self.make_pat(pat, Ok(src.clone()));
         self.source_map.pat_map.insert(src, id);
         id
     }
@@ -298,28 +300,41 @@ impl ExprCollector<'_> {
                 self.alloc_expr(Expr::Return { expr }, syntax_ptr)
             }
             ast::Expr::RecordLit(e) => {
+                let crate_graph = self.db.crate_graph();
                 let path = e.path().and_then(|path| self.expander.parse_path(path));
                 let mut field_ptrs = Vec::new();
                 let record_lit = if let Some(nfl) = e.record_field_list() {
                     let fields = nfl
                         .fields()
                         .inspect(|field| field_ptrs.push(AstPtr::new(field)))
-                        .map(|field| RecordLitField {
-                            name: field
-                                .name_ref()
-                                .map(|nr| nr.as_name())
-                                .unwrap_or_else(Name::missing),
-                            expr: if let Some(e) = field.expr() {
-                                self.collect_expr(e)
-                            } else if let Some(nr) = field.name_ref() {
-                                // field shorthand
-                                self.alloc_expr_field_shorthand(
-                                    Expr::Path(Path::from_name_ref(&nr)),
-                                    AstPtr::new(&field),
-                                )
-                            } else {
-                                self.missing_expr()
-                            },
+                        .filter_map(|field| {
+                            let module_id = ContainerId::DefWithBodyId(self.def).module(self.db);
+                            let attrs = Attrs::new(
+                                &field,
+                                &Hygiene::new(self.db.upcast(), self.expander.current_file_id),
+                            );
+
+                            if !attrs.is_cfg_enabled(&crate_graph[module_id.krate].cfg_options) {
+                                return None;
+                            }
+
+                            Some(RecordLitField {
+                                name: field
+                                    .name_ref()
+                                    .map(|nr| nr.as_name())
+                                    .unwrap_or_else(Name::missing),
+                                expr: if let Some(e) = field.expr() {
+                                    self.collect_expr(e)
+                                } else if let Some(nr) = field.name_ref() {
+                                    // field shorthand
+                                    self.alloc_expr_field_shorthand(
+                                        Expr::Path(Path::from_name_ref(&nr)),
+                                        AstPtr::new(&field),
+                                    )
+                                } else {
+                                    self.missing_expr()
+                                },
+                            })
                         })
                         .collect();
                     let spread = nfl.spread().map(|s| self.collect_expr(s));
@@ -357,7 +372,7 @@ impl ExprCollector<'_> {
             }
             ast::Expr::RefExpr(e) => {
                 let expr = self.collect_expr_opt(e.expr());
-                let mutability = Mutability::from_mutable(e.is_mut());
+                let mutability = Mutability::from_mutable(e.mut_token().is_some());
                 self.alloc_expr(Expr::Ref { expr, mutability }, syntax_ptr)
             }
             ast::Expr::PrefixExpr(e) => {
@@ -572,10 +587,8 @@ impl ExprCollector<'_> {
         let pattern = match &pat {
             ast::Pat::BindPat(bp) => {
                 let name = bp.name().map(|nr| nr.as_name()).unwrap_or_else(Name::missing);
-                let annotation = BindingAnnotation::new(
-                    bp.mut_kw_token().is_some(),
-                    bp.ref_kw_token().is_some(),
-                );
+                let annotation =
+                    BindingAnnotation::new(bp.mut_token().is_some(), bp.ref_token().is_some());
                 let subpat = bp.pat().map(|subpat| self.collect_pat(subpat));
                 if annotation == BindingAnnotation::Unannotated && subpat.is_none() {
                     // This could also be a single-segment path pattern. To
@@ -616,7 +629,7 @@ impl ExprCollector<'_> {
             }
             ast::Pat::RefPat(p) => {
                 let pat = self.collect_pat_opt(p.pat());
-                let mutability = Mutability::from_mutable(p.mut_kw_token().is_some());
+                let mutability = Mutability::from_mutable(p.mut_token().is_some());
                 Pat::Ref { pat, mutability }
             }
             ast::Pat::PathPat(p) => {
@@ -655,7 +668,9 @@ impl ExprCollector<'_> {
                 });
                 fields.extend(iter);
 
-                Pat::Record { path, args: fields }
+                let ellipsis = record_field_pat_list.dotdot_token().is_some();
+
+                Pat::Record { path, args: fields, ellipsis }
             }
             ast::Pat::SlicePat(p) => {
                 let SlicePatComponents { prefix, slice, suffix } = p.components();
diff --git a/crates/ra_hir_def/src/data.rs b/crates/ra_hir_def/src/data.rs
index 689bb6c5c..b8fbf0ed4 100644
--- a/crates/ra_hir_def/src/data.rs
+++ b/crates/ra_hir_def/src/data.rs
@@ -7,7 +7,6 @@ use hir_expand::{
     name::{name, AsName, Name},
     AstId, InFile,
 };
-use ra_cfg::CfgOptions;
 use ra_prof::profile;
 use ra_syntax::ast::{
     self, AstNode, ImplItem, ModuleItemOwner, NameOwner, TypeAscriptionOwner, VisibilityOwner,
@@ -75,7 +74,7 @@ impl FunctionData {
             TypeRef::unit()
         };
 
-        let ret_type = if src.value.async_kw_token().is_some() {
+        let ret_type = if src.value.async_token().is_some() {
             let future_impl = desugar_future_path(ret_type);
             let ty_bound = TypeBound::Path(future_impl);
             TypeRef::ImplTrait(vec![ty_bound])
@@ -136,7 +135,7 @@ impl TraitData {
     pub(crate) fn trait_data_query(db: &dyn DefDatabase, tr: TraitId) -> Arc<TraitData> {
         let src = tr.lookup(db).source(db);
         let name = src.value.name().map_or_else(Name::missing, |n| n.as_name());
-        let auto = src.value.auto_kw_token().is_some();
+        let auto = src.value.auto_token().is_some();
         let ast_id_map = db.ast_id_map(src.file_id);
 
         let container = AssocContainerId::TraitId(tr);
@@ -318,10 +317,6 @@ fn collect_impl_items_in_macro(
     }
 }
 
-fn is_cfg_enabled(cfg_options: &CfgOptions, attrs: &Attrs) -> bool {
-    attrs.by_key("cfg").tt_values().all(|tt| cfg_options.is_cfg_enabled(tt) != Some(false))
-}
-
 fn collect_impl_items(
     db: &dyn DefDatabase,
     impl_items: impl Iterator<Item = ImplItem>,
@@ -341,10 +336,11 @@ fn collect_impl_items(
                 }
                 .intern(db);
 
-                if !is_cfg_enabled(
-                    &crate_graph[module_id.krate].cfg_options,
-                    &db.function_data(def).attrs,
-                ) {
+                if !db
+                    .function_data(def)
+                    .attrs
+                    .is_cfg_enabled(&crate_graph[module_id.krate].cfg_options)
+                {
                     None
                 } else {
                     Some(def.into())
diff --git a/crates/ra_hir_def/src/diagnostics.rs b/crates/ra_hir_def/src/diagnostics.rs
index 095498429..cfa0f2f76 100644
--- a/crates/ra_hir_def/src/diagnostics.rs
+++ b/crates/ra_hir_def/src/diagnostics.rs
@@ -20,7 +20,7 @@ impl Diagnostic for UnresolvedModule {
         "unresolved module".to_string()
     }
     fn source(&self) -> InFile<SyntaxNodePtr> {
-        InFile { file_id: self.file, value: self.decl.into() }
+        InFile { file_id: self.file, value: self.decl.clone().into() }
     }
     fn as_any(&self) -> &(dyn Any + Send + 'static) {
         self
diff --git a/crates/ra_hir_def/src/expr.rs b/crates/ra_hir_def/src/expr.rs
index 197bbe9bd..e11bdf3ec 100644
--- a/crates/ra_hir_def/src/expr.rs
+++ b/crates/ra_hir_def/src/expr.rs
@@ -376,35 +376,14 @@ pub enum Pat {
     Wild,
     Tuple(Vec<PatId>),
     Or(Vec<PatId>),
-    Record {
-        path: Option<Path>,
-        args: Vec<RecordFieldPat>,
-        // FIXME: 'ellipsis' option
-    },
-    Range {
-        start: ExprId,
-        end: ExprId,
-    },
-    Slice {
-        prefix: Vec<PatId>,
-        slice: Option<PatId>,
-        suffix: Vec<PatId>,
-    },
+    Record { path: Option<Path>, args: Vec<RecordFieldPat>, ellipsis: bool },
+    Range { start: ExprId, end: ExprId },
+    Slice { prefix: Vec<PatId>, slice: Option<PatId>, suffix: Vec<PatId> },
     Path(Path),
     Lit(ExprId),
-    Bind {
-        mode: BindingAnnotation,
-        name: Name,
-        subpat: Option<PatId>,
-    },
-    TupleStruct {
-        path: Option<Path>,
-        args: Vec<PatId>,
-    },
-    Ref {
-        pat: PatId,
-        mutability: Mutability,
-    },
+    Bind { mode: BindingAnnotation, name: Name, subpat: Option<PatId> },
+    TupleStruct { path: Option<Path>, args: Vec<PatId> },
+    Ref { pat: PatId, mutability: Mutability },
 }
 
 impl Pat {
diff --git a/crates/ra_hir_def/src/lang_item.rs b/crates/ra_hir_def/src/lang_item.rs
index 01b367278..d96ac8c0a 100644
--- a/crates/ra_hir_def/src/lang_item.rs
+++ b/crates/ra_hir_def/src/lang_item.rs
@@ -4,6 +4,7 @@
 //! features, such as Fn family of traits.
 use std::sync::Arc;
 
+use ra_prof::profile;
 use ra_syntax::SmolStr;
 use rustc_hash::FxHashMap;
 
@@ -78,6 +79,8 @@ impl LangItems {
 
     /// Salsa query. This will look for lang items in a specific crate.
     pub(crate) fn crate_lang_items_query(db: &dyn DefDatabase, krate: CrateId) -> Arc<LangItems> {
+        let _p = profile("crate_lang_items_query");
+
         let mut lang_items = LangItems::default();
 
         let crate_def_map = db.crate_def_map(krate);
@@ -95,6 +98,7 @@ impl LangItems {
         db: &dyn DefDatabase,
         module: ModuleId,
     ) -> Option<Arc<LangItems>> {
+        let _p = profile("module_lang_items_query");
         let mut lang_items = LangItems::default();
         lang_items.collect_lang_items(db, module);
         if lang_items.items.is_empty() {
@@ -111,6 +115,7 @@ impl LangItems {
         start_crate: CrateId,
         item: SmolStr,
     ) -> Option<LangItemTarget> {
+        let _p = profile("lang_item_query");
         let lang_items = db.crate_lang_items(start_crate);
         let start_crate_target = lang_items.items.get(&item);
         if let Some(target) = start_crate_target {
diff --git a/crates/ra_hir_def/src/nameres/raw.rs b/crates/ra_hir_def/src/nameres/raw.rs
index e72ba52cf..afd538e4a 100644
--- a/crates/ra_hir_def/src/nameres/raw.rs
+++ b/crates/ra_hir_def/src/nameres/raw.rs
@@ -287,7 +287,7 @@ impl RawItemsCollector {
         let visibility = RawVisibility::from_ast_with_hygiene(module.visibility(), &self.hygiene);
 
         let ast_id = self.source_ast_id_map.ast_id(&module);
-        if module.semi_token().is_some() {
+        if module.semicolon_token().is_some() {
             let item =
                 self.raw_items.modules.alloc(ModuleData::Declaration { name, visibility, ast_id });
             self.push_item(current_module, attrs, RawItemKind::Module(item));
diff --git a/crates/ra_hir_def/src/type_ref.rs b/crates/ra_hir_def/src/type_ref.rs
index 7a8338937..ea29c4176 100644
--- a/crates/ra_hir_def/src/type_ref.rs
+++ b/crates/ra_hir_def/src/type_ref.rs
@@ -77,7 +77,7 @@ impl TypeRef {
             }
             ast::TypeRef::PointerType(inner) => {
                 let inner_ty = TypeRef::from_ast_opt(inner.type_ref());
-                let mutability = Mutability::from_mutable(inner.mut_kw_token().is_some());
+                let mutability = Mutability::from_mutable(inner.mut_token().is_some());
                 TypeRef::RawPtr(Box::new(inner_ty), mutability)
             }
             ast::TypeRef::ArrayType(inner) => {
@@ -88,7 +88,7 @@ impl TypeRef {
             }
             ast::TypeRef::ReferenceType(inner) => {
                 let inner_ty = TypeRef::from_ast_opt(inner.type_ref());
-                let mutability = Mutability::from_mutable(inner.mut_kw_token().is_some());
+                let mutability = Mutability::from_mutable(inner.mut_token().is_some());
                 TypeRef::Reference(Box::new(inner_ty), mutability)
             }
             ast::TypeRef::PlaceholderType(_inner) => TypeRef::Placeholder,
diff --git a/crates/ra_hir_expand/src/ast_id_map.rs b/crates/ra_hir_expand/src/ast_id_map.rs
index 5643ecdce..a3ca302c2 100644
--- a/crates/ra_hir_expand/src/ast_id_map.rs
+++ b/crates/ra_hir_expand/src/ast_id_map.rs
@@ -90,7 +90,7 @@ impl AstIdMap {
     }
 
     pub(crate) fn get<N: AstNode>(&self, id: FileAstId<N>) -> AstPtr<N> {
-        self.arena[id.raw].cast::<N>().unwrap()
+        self.arena[id.raw].clone().cast::<N>().unwrap()
     }
 
     fn alloc(&mut self, item: &SyntaxNode) -> ErasedFileAstId {
diff --git a/crates/ra_hir_ty/Cargo.toml b/crates/ra_hir_ty/Cargo.toml
index 9a4a7aa6f..59efc1c31 100644
--- a/crates/ra_hir_ty/Cargo.toml
+++ b/crates/ra_hir_ty/Cargo.toml
@@ -24,6 +24,8 @@ ra_prof = { path = "../ra_prof" }
 ra_syntax = { path = "../ra_syntax" }
 test_utils = { path = "../test_utils" }
 
+scoped-tls = "1"
+
 chalk-solve =   { git = "https://github.com/rust-lang/chalk.git", rev = "039fc904a05f8cb3d0c682c9a57a63dda7a35356" }
 chalk-rust-ir = { git = "https://github.com/rust-lang/chalk.git", rev = "039fc904a05f8cb3d0c682c9a57a63dda7a35356" }
 chalk-ir =      { git = "https://github.com/rust-lang/chalk.git", rev = "039fc904a05f8cb3d0c682c9a57a63dda7a35356" }
diff --git a/crates/ra_hir_ty/src/diagnostics.rs b/crates/ra_hir_ty/src/diagnostics.rs
index 8cbce1168..927896d6f 100644
--- a/crates/ra_hir_ty/src/diagnostics.rs
+++ b/crates/ra_hir_ty/src/diagnostics.rs
@@ -21,7 +21,7 @@ impl Diagnostic for NoSuchField {
     }
 
     fn source(&self) -> InFile<SyntaxNodePtr> {
-        InFile { file_id: self.file, value: self.field.into() }
+        InFile { file_id: self.file, value: self.field.clone().into() }
     }
 
     fn as_any(&self) -> &(dyn Any + Send + 'static) {
@@ -45,7 +45,7 @@ impl Diagnostic for MissingFields {
         buf
     }
     fn source(&self) -> InFile<SyntaxNodePtr> {
-        InFile { file_id: self.file, value: self.field_list.into() }
+        InFile { file_id: self.file, value: self.field_list.clone().into() }
     }
     fn as_any(&self) -> &(dyn Any + Send + 'static) {
         self
@@ -63,6 +63,29 @@ impl AstDiagnostic for MissingFields {
 }
 
 #[derive(Debug)]
+pub struct MissingPatFields {
+    pub file: HirFileId,
+    pub field_list: AstPtr<ast::RecordFieldPatList>,
+    pub missed_fields: Vec<Name>,
+}
+
+impl Diagnostic for MissingPatFields {
+    fn message(&self) -> String {
+        let mut buf = String::from("Missing structure fields:\n");
+        for field in &self.missed_fields {
+            format_to!(buf, "- {}", field);
+        }
+        buf
+    }
+    fn source(&self) -> InFile<SyntaxNodePtr> {
+        InFile { file_id: self.file, value: self.field_list.clone().into() }
+    }
+    fn as_any(&self) -> &(dyn Any + Send + 'static) {
+        self
+    }
+}
+
+#[derive(Debug)]
 pub struct MissingMatchArms {
     pub file: HirFileId,
     pub match_expr: AstPtr<ast::Expr>,
@@ -74,7 +97,7 @@ impl Diagnostic for MissingMatchArms {
         String::from("Missing match arm")
     }
     fn source(&self) -> InFile<SyntaxNodePtr> {
-        InFile { file_id: self.file, value: self.match_expr.into() }
+        InFile { file_id: self.file, value: self.match_expr.clone().into() }
     }
     fn as_any(&self) -> &(dyn Any + Send + 'static) {
         self
@@ -92,7 +115,7 @@ impl Diagnostic for MissingOkInTailExpr {
         "wrap return expression in Ok".to_string()
     }
     fn source(&self) -> InFile<SyntaxNodePtr> {
-        InFile { file_id: self.file, value: self.expr.into() }
+        InFile { file_id: self.file, value: self.expr.clone().into() }
     }
     fn as_any(&self) -> &(dyn Any + Send + 'static) {
         self
diff --git a/crates/ra_hir_ty/src/display.rs b/crates/ra_hir_ty/src/display.rs
index 0e9313aa1..d03bbd5a7 100644
--- a/crates/ra_hir_ty/src/display.rs
+++ b/crates/ra_hir_ty/src/display.rs
@@ -247,19 +247,21 @@ impl HirDisplay for ApplicationTy {
                 }
             }
             TypeCtor::Closure { .. } => {
-                let sig = self.parameters[0]
-                    .callable_sig(f.db)
-                    .expect("first closure parameter should contain signature");
-                if sig.params().is_empty() {
-                    write!(f, "||")?;
-                } else if f.omit_verbose_types() {
-                    write!(f, "|{}|", TYPE_HINT_TRUNCATION)?;
+                let sig = self.parameters[0].callable_sig(f.db);
+                if let Some(sig) = sig {
+                    if sig.params().is_empty() {
+                        write!(f, "||")?;
+                    } else if f.omit_verbose_types() {
+                        write!(f, "|{}|", TYPE_HINT_TRUNCATION)?;
+                    } else {
+                        write!(f, "|")?;
+                        f.write_joined(sig.params(), ", ")?;
+                        write!(f, "|")?;
+                    };
+                    write!(f, " -> {}", sig.ret().display(f.db))?;
                 } else {
-                    write!(f, "|")?;
-                    f.write_joined(sig.params(), ", ")?;
-                    write!(f, "|")?;
-                };
-                write!(f, " -> {}", sig.ret().display(f.db))?;
+                    write!(f, "{{closure}}")?;
+                }
             }
         }
         Ok(())
diff --git a/crates/ra_hir_ty/src/expr.rs b/crates/ra_hir_ty/src/expr.rs
index e45e9ea14..827b687de 100644
--- a/crates/ra_hir_ty/src/expr.rs
+++ b/crates/ra_hir_ty/src/expr.rs
@@ -9,7 +9,7 @@ use rustc_hash::FxHashSet;
 
 use crate::{
     db::HirDatabase,
-    diagnostics::{MissingFields, MissingMatchArms, MissingOkInTailExpr},
+    diagnostics::{MissingFields, MissingMatchArms, MissingOkInTailExpr, MissingPatFields},
     utils::variant_data,
     ApplicationTy, InferenceResult, Ty, TypeCtor,
     _match::{is_useful, MatchCheckCtx, Matrix, PatStack, Usefulness},
@@ -49,39 +49,97 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
             if let Some((variant_def, missed_fields, true)) =
                 record_literal_missing_fields(db, &self.infer, id, expr)
             {
-                // XXX: only look at source_map if we do have missing fields
-                let (_, source_map) = db.body_with_source_map(self.func.into());
-
-                if let Ok(source_ptr) = source_map.expr_syntax(id) {
-                    if let Some(expr) = source_ptr.value.left() {
-                        let root = source_ptr.file_syntax(db.upcast());
-                        if let ast::Expr::RecordLit(record_lit) = expr.to_node(&root) {
-                            if let Some(field_list) = record_lit.record_field_list() {
-                                let variant_data = variant_data(db.upcast(), variant_def);
-                                let missed_fields = missed_fields
-                                    .into_iter()
-                                    .map(|idx| variant_data.fields()[idx].name.clone())
-                                    .collect();
-                                self.sink.push(MissingFields {
-                                    file: source_ptr.file_id,
-                                    field_list: AstPtr::new(&field_list),
-                                    missed_fields,
-                                })
-                            }
-                        }
-                    }
-                }
+                self.create_record_literal_missing_fields_diagnostic(
+                    id,
+                    db,
+                    variant_def,
+                    missed_fields,
+                );
             }
             if let Expr::Match { expr, arms } = expr {
                 self.validate_match(id, *expr, arms, db, self.infer.clone());
             }
         }
+        for (id, pat) in body.pats.iter() {
+            if let Some((variant_def, missed_fields, true)) =
+                record_pattern_missing_fields(db, &self.infer, id, pat)
+            {
+                self.create_record_pattern_missing_fields_diagnostic(
+                    id,
+                    db,
+                    variant_def,
+                    missed_fields,
+                );
+            }
+        }
         let body_expr = &body[body.body_expr];
         if let Expr::Block { tail: Some(t), .. } = body_expr {
             self.validate_results_in_tail_expr(body.body_expr, *t, db);
         }
     }
 
+    fn create_record_literal_missing_fields_diagnostic(
+        &mut self,
+        id: ExprId,
+        db: &dyn HirDatabase,
+        variant_def: VariantId,
+        missed_fields: Vec<LocalStructFieldId>,
+    ) {
+        // XXX: only look at source_map if we do have missing fields
+        let (_, source_map) = db.body_with_source_map(self.func.into());
+
+        if let Ok(source_ptr) = source_map.expr_syntax(id) {
+            if let Some(expr) = source_ptr.value.as_ref().left() {
+                let root = source_ptr.file_syntax(db.upcast());
+                if let ast::Expr::RecordLit(record_lit) = expr.to_node(&root) {
+                    if let Some(field_list) = record_lit.record_field_list() {
+                        let variant_data = variant_data(db.upcast(), variant_def);
+                        let missed_fields = missed_fields
+                            .into_iter()
+                            .map(|idx| variant_data.fields()[idx].name.clone())
+                            .collect();
+                        self.sink.push(MissingFields {
+                            file: source_ptr.file_id,
+                            field_list: AstPtr::new(&field_list),
+                            missed_fields,
+                        })
+                    }
+                }
+            }
+        }
+    }
+
+    fn create_record_pattern_missing_fields_diagnostic(
+        &mut self,
+        id: PatId,
+        db: &dyn HirDatabase,
+        variant_def: VariantId,
+        missed_fields: Vec<LocalStructFieldId>,
+    ) {
+        // XXX: only look at source_map if we do have missing fields
+        let (_, source_map) = db.body_with_source_map(self.func.into());
+
+        if let Ok(source_ptr) = source_map.pat_syntax(id) {
+            if let Some(expr) = source_ptr.value.as_ref().left() {
+                let root = source_ptr.file_syntax(db.upcast());
+                if let ast::Pat::RecordPat(record_pat) = expr.to_node(&root) {
+                    if let Some(field_list) = record_pat.record_field_pat_list() {
+                        let variant_data = variant_data(db.upcast(), variant_def);
+                        let missed_fields = missed_fields
+                            .into_iter()
+                            .map(|idx| variant_data.fields()[idx].name.clone())
+                            .collect();
+                        self.sink.push(MissingPatFields {
+                            file: source_ptr.file_id,
+                            field_list: AstPtr::new(&field_list),
+                            missed_fields,
+                        })
+                    }
+                }
+            }
+        }
+    }
+
     fn validate_match(
         &mut self,
         id: ExprId,
@@ -147,7 +205,7 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
         }
 
         if let Ok(source_ptr) = source_map.expr_syntax(id) {
-            if let Some(expr) = source_ptr.value.left() {
+            if let Some(expr) = source_ptr.value.as_ref().left() {
                 let root = source_ptr.file_syntax(db.upcast());
                 if let ast::Expr::MatchExpr(match_expr) = expr.to_node(&root) {
                     if let (Some(match_expr), Some(arms)) =
@@ -232,9 +290,9 @@ pub fn record_pattern_missing_fields(
     infer: &InferenceResult,
     id: PatId,
     pat: &Pat,
-) -> Option<(VariantId, Vec<LocalStructFieldId>)> {
-    let fields = match pat {
-        Pat::Record { path: _, args } => args,
+) -> Option<(VariantId, Vec<LocalStructFieldId>, /*exhaustive*/ bool)> {
+    let (fields, exhaustive) = match pat {
+        Pat::Record { path: _, args, ellipsis } => (args, !ellipsis),
         _ => return None,
     };
 
@@ -254,5 +312,5 @@ pub fn record_pattern_missing_fields(
     if missed_fields.is_empty() {
         return None;
     }
-    Some((variant_def, missed_fields))
+    Some((variant_def, missed_fields, exhaustive))
 }
diff --git a/crates/ra_hir_ty/src/infer/pat.rs b/crates/ra_hir_ty/src/infer/pat.rs
index 69bbb4307..078476f76 100644
--- a/crates/ra_hir_ty/src/infer/pat.rs
+++ b/crates/ra_hir_ty/src/infer/pat.rs
@@ -158,7 +158,7 @@ impl<'a> InferenceContext<'a> {
             Pat::TupleStruct { path: p, args: subpats } => {
                 self.infer_tuple_struct_pat(p.as_ref(), subpats, expected, default_bm, pat)
             }
-            Pat::Record { path: p, args: fields } => {
+            Pat::Record { path: p, args: fields, ellipsis: _ } => {
                 self.infer_record_pat(p.as_ref(), fields, expected, default_bm, pat)
             }
             Pat::Path(path) => {
diff --git a/crates/ra_hir_ty/src/tests.rs b/crates/ra_hir_ty/src/tests.rs
index f97e0bfeb..54e31602f 100644
--- a/crates/ra_hir_ty/src/tests.rs
+++ b/crates/ra_hir_ty/src/tests.rs
@@ -23,7 +23,7 @@ use insta::assert_snapshot;
 use ra_db::{fixture::WithFixture, salsa::Database, FilePosition, SourceDatabase};
 use ra_syntax::{
     algo,
-    ast::{self, AstNode, AstToken},
+    ast::{self, AstNode},
 };
 use stdx::format_to;
 
@@ -87,7 +87,7 @@ fn infer_with_mismatches(content: &str, include_mismatches: bool) -> String {
                 }
                 Err(SyntheticSyntax) => continue,
             };
-            types.push((syntax_ptr, ty));
+            types.push((syntax_ptr.clone(), ty));
             if let Some(mismatch) = inference_result.type_mismatch_for_expr(expr) {
                 mismatches.push((syntax_ptr, mismatch));
             }
@@ -101,7 +101,7 @@ fn infer_with_mismatches(content: &str, include_mismatches: bool) -> String {
             let node = src_ptr.value.to_node(&src_ptr.file_syntax(&db));
 
             let (range, text) = if let Some(self_param) = ast::SelfParam::cast(node.clone()) {
-                (self_param.self_kw_token().unwrap().syntax().text_range(), "self".to_string())
+                (self_param.self_token().unwrap().text_range(), "self".to_string())
             } else {
                 (src_ptr.value.range(), node.text().to_string().replace("\n", " "))
             };
@@ -349,3 +349,103 @@ fn no_such_field_with_feature_flag_diagnostics() {
 
     assert_snapshot!(diagnostics, @r###""###);
 }
+
+#[test]
+fn no_such_field_with_feature_flag_diagnostics_on_struct_lit() {
+    let diagnostics = TestDB::with_files(
+        r#"
+        //- /lib.rs crate:foo cfg:feature=foo
+        struct S {
+            #[cfg(feature = "foo")]
+            foo: u32,
+            #[cfg(not(feature = "foo"))]
+            bar: u32,
+        }
+
+        impl S {
+            #[cfg(feature = "foo")]
+            fn new(foo: u32) -> Self {
+                Self { foo }
+            }
+            #[cfg(not(feature = "foo"))]
+            fn new(bar: u32) -> Self {
+                Self { bar }
+            }
+        }
+        "#,
+    )
+    .diagnostics()
+    .0;
+
+    assert_snapshot!(diagnostics, @r###""###);
+}
+
+#[test]
+fn no_such_field_with_feature_flag_diagnostics_on_struct_fields() {
+    let diagnostics = TestDB::with_files(
+        r#"
+        //- /lib.rs crate:foo cfg:feature=foo
+        struct S {
+            #[cfg(feature = "foo")]
+            foo: u32,
+            #[cfg(not(feature = "foo"))]
+            bar: u32,
+        }
+
+        impl S {
+            fn new(val: u32) -> Self {
+                Self {
+                    #[cfg(feature = "foo")]
+                    foo: val,
+                    #[cfg(not(feature = "foo"))]
+                    bar: val,
+                }
+            }
+        }
+        "#,
+    )
+    .diagnostics()
+    .0;
+
+    assert_snapshot!(diagnostics, @r###""###);
+}
+
+#[test]
+fn missing_record_pat_field_diagnostic() {
+    let diagnostics = TestDB::with_files(
+        r"
+        //- /lib.rs
+        struct S { foo: i32, bar: () }
+        fn baz(s: S) {
+            let S { foo: _ } = s;
+        }
+        ",
+    )
+    .diagnostics()
+    .0;
+
+    assert_snapshot!(diagnostics, @r###"
+    "{ foo: _ }": Missing structure fields:
+    - bar
+    "###
+    );
+}
+
+#[test]
+fn missing_record_pat_field_no_diagnostic_if_not_exhaustive() {
+    let diagnostics = TestDB::with_files(
+        r"
+        //- /lib.rs
+        struct S { foo: i32, bar: () }
+        fn baz(s: S) -> i32 {
+            match s {
+                S { foo, .. } => foo,
+            }
+        }
+        ",
+    )
+    .diagnostics()
+    .0;
+
+    assert_snapshot!(diagnostics, @"");
+}
diff --git a/crates/ra_hir_ty/src/tests/macros.rs b/crates/ra_hir_ty/src/tests/macros.rs
index ff4599b71..f2a9b1c40 100644
--- a/crates/ra_hir_ty/src/tests/macros.rs
+++ b/crates/ra_hir_ty/src/tests/macros.rs
@@ -1,10 +1,13 @@
+use std::fs;
+
 use insta::assert_snapshot;
 use ra_db::fixture::WithFixture;
-
-use super::{infer, type_at, type_at_pos};
+use test_utils::project_dir;
 
 use crate::test_db::TestDB;
 
+use super::{infer, type_at, type_at_pos};
+
 #[test]
 fn cfg_impl_def() {
     let (db, pos) = TestDB::with_position(
@@ -482,6 +485,30 @@ fn bar() -> u32 {0}
 }
 
 #[test]
+#[ignore]
+fn include_accidentally_quadratic() {
+    let file = project_dir().join("crates/ra_syntax/test_data/accidentally_quadratic");
+    let big_file = fs::read_to_string(file).unwrap();
+    let big_file = vec![big_file; 10].join("\n");
+
+    let fixture = r#"
+//- /main.rs
+#[rustc_builtin_macro]
+macro_rules! include {() => {}}
+
+include!("foo.rs");
+
+fn main() {
+    RegisterBlock { }<|>;
+}
+    "#;
+    let fixture = format!("{}\n//- /foo.rs\n{}", fixture, big_file);
+
+    let (db, pos) = TestDB::with_position(&fixture);
+    assert_eq!("RegisterBlock", type_at_pos(&db, pos));
+}
+
+#[test]
 fn infer_builtin_macros_include_concat() {
     let (db, pos) = TestDB::with_position(
         r#"
diff --git a/crates/ra_hir_ty/src/traits.rs b/crates/ra_hir_ty/src/traits.rs
index 5a1e12ce9..21e233379 100644
--- a/crates/ra_hir_ty/src/traits.rs
+++ b/crates/ra_hir_ty/src/traits.rs
@@ -177,7 +177,7 @@ fn solve(
 
     let fuel = std::cell::Cell::new(CHALK_SOLVER_FUEL);
 
-    let solution = solver.solve_limited(&context, goal, || {
+    let should_continue = || {
         context.db.check_canceled();
         let remaining = fuel.get();
         fuel.set(remaining - 1);
@@ -185,12 +185,21 @@ fn solve(
             log::debug!("fuel exhausted");
         }
         remaining > 0
-    });
+    };
+    let mut solve = || solver.solve_limited(&context, goal, should_continue);
+    // don't set the TLS for Chalk unless Chalk debugging is active, to make
+    // extra sure we only use it for debugging
+    let solution =
+        if is_chalk_debug() { chalk::tls::set_current_program(db, solve) } else { solve() };
 
     log::debug!("solve({:?}) => {:?}", goal, solution);
     solution
 }
 
+fn is_chalk_debug() -> bool {
+    std::env::var("CHALK_DEBUG").is_ok()
+}
+
 fn solution_from_chalk(
     db: &dyn HirDatabase,
     solution: chalk_solve::Solution<Interner>,
diff --git a/crates/ra_hir_ty/src/traits/chalk.rs b/crates/ra_hir_ty/src/traits/chalk.rs
index 1bc0f0713..c5f1b5232 100644
--- a/crates/ra_hir_ty/src/traits/chalk.rs
+++ b/crates/ra_hir_ty/src/traits/chalk.rs
@@ -20,6 +20,8 @@ use crate::{
     ProjectionTy, Substs, TraitRef, Ty, TypeCtor,
 };
 
+pub(super) mod tls;
+
 #[derive(Debug, Copy, Clone, Hash, PartialOrd, Ord, PartialEq, Eq)]
 pub struct Interner;
 
@@ -33,90 +35,85 @@ impl chalk_ir::interner::Interner for Interner {
     type Identifier = TypeAliasId;
     type DefId = InternId;
 
-    // FIXME: implement these
     fn debug_struct_id(
-        _type_kind_id: chalk_ir::StructId<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        type_kind_id: StructId,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| Some(prog?.debug_struct_id(type_kind_id, fmt)))
     }
 
-    fn debug_trait_id(
-        _type_kind_id: chalk_ir::TraitId<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
-    ) -> Option<fmt::Result> {
-        None
+    fn debug_trait_id(type_kind_id: TraitId, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
+        tls::with_current_program(|prog| Some(prog?.debug_trait_id(type_kind_id, fmt)))
     }
 
-    fn debug_assoc_type_id(
-        _id: chalk_ir::AssocTypeId<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
-    ) -> Option<fmt::Result> {
-        None
+    fn debug_assoc_type_id(id: AssocTypeId, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
+        tls::with_current_program(|prog| Some(prog?.debug_assoc_type_id(id, fmt)))
     }
 
     fn debug_alias(
-        _projection: &chalk_ir::AliasTy<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        alias: &chalk_ir::AliasTy<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| Some(prog?.debug_alias(alias, fmt)))
     }
 
-    fn debug_ty(_ty: &chalk_ir::Ty<Self>, _fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
-        None
+    fn debug_ty(ty: &chalk_ir::Ty<Interner>, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
+        tls::with_current_program(|prog| Some(prog?.debug_ty(ty, fmt)))
     }
 
     fn debug_lifetime(
-        _lifetime: &chalk_ir::Lifetime<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        lifetime: &chalk_ir::Lifetime<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| Some(prog?.debug_lifetime(lifetime, fmt)))
     }
 
     fn debug_parameter(
-        _parameter: &Parameter<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        parameter: &Parameter<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| Some(prog?.debug_parameter(parameter, fmt)))
     }
 
-    fn debug_goal(_goal: &Goal<Self>, _fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
-        None
+    fn debug_goal(goal: &Goal<Interner>, fmt: &mut fmt::Formatter<'_>) -> Option<fmt::Result> {
+        tls::with_current_program(|prog| Some(prog?.debug_goal(goal, fmt)))
     }
 
     fn debug_goals(
-        _goals: &chalk_ir::Goals<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        goals: &chalk_ir::Goals<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| Some(prog?.debug_goals(goals, fmt)))
     }
 
     fn debug_program_clause_implication(
-        _pci: &chalk_ir::ProgramClauseImplication<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        pci: &chalk_ir::ProgramClauseImplication<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| Some(prog?.debug_program_clause_implication(pci, fmt)))
     }
 
     fn debug_application_ty(
-        _application_ty: &chalk_ir::ApplicationTy<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        application_ty: &chalk_ir::ApplicationTy<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| Some(prog?.debug_application_ty(application_ty, fmt)))
     }
 
     fn debug_substitution(
-        _substitution: &chalk_ir::Substitution<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        substitution: &chalk_ir::Substitution<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| Some(prog?.debug_substitution(substitution, fmt)))
     }
 
     fn debug_separator_trait_ref(
-        _separator_trait_ref: &chalk_ir::SeparatorTraitRef<Self>,
-        _fmt: &mut fmt::Formatter<'_>,
+        separator_trait_ref: &chalk_ir::SeparatorTraitRef<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
     ) -> Option<fmt::Result> {
-        None
+        tls::with_current_program(|prog| {
+            Some(prog?.debug_separator_trait_ref(separator_trait_ref, fmt))
+        })
     }
 
     fn intern_ty(&self, ty: chalk_ir::TyData<Self>) -> Box<chalk_ir::TyData<Self>> {
diff --git a/crates/ra_hir_ty/src/traits/chalk/tls.rs b/crates/ra_hir_ty/src/traits/chalk/tls.rs
new file mode 100644
index 000000000..d9bbb54a5
--- /dev/null
+++ b/crates/ra_hir_ty/src/traits/chalk/tls.rs
@@ -0,0 +1,231 @@
+//! Implementation of Chalk debug helper functions using TLS.
+use std::fmt;
+
+use chalk_ir::{AliasTy, Goal, Goals, Lifetime, Parameter, ProgramClauseImplication, TypeName};
+
+use super::{from_chalk, Interner};
+use crate::{db::HirDatabase, CallableDef, TypeCtor};
+use hir_def::{AdtId, AssocContainerId, Lookup, TypeAliasId};
+
+pub use unsafe_tls::{set_current_program, with_current_program};
+
+pub struct DebugContext<'a>(&'a (dyn HirDatabase + 'a));
+
+impl DebugContext<'_> {
+    pub fn debug_struct_id(
+        &self,
+        id: super::StructId,
+        f: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        let type_ctor: TypeCtor = from_chalk(self.0, TypeName::Struct(id));
+        match type_ctor {
+            TypeCtor::Bool => write!(f, "bool")?,
+            TypeCtor::Char => write!(f, "char")?,
+            TypeCtor::Int(t) => write!(f, "{}", t)?,
+            TypeCtor::Float(t) => write!(f, "{}", t)?,
+            TypeCtor::Str => write!(f, "str")?,
+            TypeCtor::Slice => write!(f, "slice")?,
+            TypeCtor::Array => write!(f, "array")?,
+            TypeCtor::RawPtr(m) => write!(f, "*{}", m.as_keyword_for_ptr())?,
+            TypeCtor::Ref(m) => write!(f, "&{}", m.as_keyword_for_ref())?,
+            TypeCtor::Never => write!(f, "!")?,
+            TypeCtor::Tuple { .. } => {
+                write!(f, "()")?;
+            }
+            TypeCtor::FnPtr { .. } => {
+                write!(f, "fn")?;
+            }
+            TypeCtor::FnDef(def) => {
+                let name = match def {
+                    CallableDef::FunctionId(ff) => self.0.function_data(ff).name.clone(),
+                    CallableDef::StructId(s) => self.0.struct_data(s).name.clone(),
+                    CallableDef::EnumVariantId(e) => {
+                        let enum_data = self.0.enum_data(e.parent);
+                        enum_data.variants[e.local_id].name.clone()
+                    }
+                };
+                match def {
+                    CallableDef::FunctionId(_) => write!(f, "{{fn {}}}", name)?,
+                    CallableDef::StructId(_) | CallableDef::EnumVariantId(_) => {
+                        write!(f, "{{ctor {}}}", name)?
+                    }
+                }
+            }
+            TypeCtor::Adt(def_id) => {
+                let name = match def_id {
+                    AdtId::StructId(it) => self.0.struct_data(it).name.clone(),
+                    AdtId::UnionId(it) => self.0.union_data(it).name.clone(),
+                    AdtId::EnumId(it) => self.0.enum_data(it).name.clone(),
+                };
+                write!(f, "{}", name)?;
+            }
+            TypeCtor::AssociatedType(type_alias) => {
+                let trait_ = match type_alias.lookup(self.0.upcast()).container {
+                    AssocContainerId::TraitId(it) => it,
+                    _ => panic!("not an associated type"),
+                };
+                let trait_name = self.0.trait_data(trait_).name.clone();
+                let name = self.0.type_alias_data(type_alias).name.clone();
+                write!(f, "{}::{}", trait_name, name)?;
+            }
+            TypeCtor::Closure { def, expr } => {
+                write!(f, "{{closure {:?} in {:?}}}", expr.into_raw(), def)?;
+            }
+        }
+        Ok(())
+    }
+
+    pub fn debug_trait_id(
+        &self,
+        id: super::TraitId,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        let trait_: hir_def::TraitId = from_chalk(self.0, id);
+        let trait_data = self.0.trait_data(trait_);
+        write!(fmt, "{}", trait_data.name)
+    }
+
+    pub fn debug_assoc_type_id(
+        &self,
+        id: super::AssocTypeId,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        let type_alias: TypeAliasId = from_chalk(self.0, id);
+        let type_alias_data = self.0.type_alias_data(type_alias);
+        let trait_ = match type_alias.lookup(self.0.upcast()).container {
+            AssocContainerId::TraitId(t) => t,
+            _ => panic!("associated type not in trait"),
+        };
+        let trait_data = self.0.trait_data(trait_);
+        write!(fmt, "{}::{}", trait_data.name, type_alias_data.name)
+    }
+
+    pub fn debug_alias(
+        &self,
+        alias: &AliasTy<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        let type_alias: TypeAliasId = from_chalk(self.0, alias.associated_ty_id);
+        let type_alias_data = self.0.type_alias_data(type_alias);
+        let trait_ = match type_alias.lookup(self.0.upcast()).container {
+            AssocContainerId::TraitId(t) => t,
+            _ => panic!("associated type not in trait"),
+        };
+        let trait_data = self.0.trait_data(trait_);
+        let params = alias.substitution.parameters(&Interner);
+        write!(
+            fmt,
+            "<{:?} as {}<{:?}>>::{}",
+            &params[0],
+            trait_data.name,
+            &params[1..],
+            type_alias_data.name
+        )
+    }
+
+    pub fn debug_ty(
+        &self,
+        ty: &chalk_ir::Ty<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        write!(fmt, "{:?}", ty.data(&Interner))
+    }
+
+    pub fn debug_lifetime(
+        &self,
+        lifetime: &Lifetime<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        write!(fmt, "{:?}", lifetime.data(&Interner))
+    }
+
+    pub fn debug_parameter(
+        &self,
+        parameter: &Parameter<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        write!(fmt, "{:?}", parameter.data(&Interner).inner_debug())
+    }
+
+    pub fn debug_goal(
+        &self,
+        goal: &Goal<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        let goal_data = goal.data(&Interner);
+        write!(fmt, "{:?}", goal_data)
+    }
+
+    pub fn debug_goals(
+        &self,
+        goals: &Goals<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        write!(fmt, "{:?}", goals.debug(&Interner))
+    }
+
+    pub fn debug_program_clause_implication(
+        &self,
+        pci: &ProgramClauseImplication<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        write!(fmt, "{:?}", pci.debug(&Interner))
+    }
+
+    pub fn debug_application_ty(
+        &self,
+        application_ty: &chalk_ir::ApplicationTy<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        write!(fmt, "{:?}", application_ty.debug(&Interner))
+    }
+
+    pub fn debug_substitution(
+        &self,
+        substitution: &chalk_ir::Substitution<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        write!(fmt, "{:?}", substitution.debug(&Interner))
+    }
+
+    pub fn debug_separator_trait_ref(
+        &self,
+        separator_trait_ref: &chalk_ir::SeparatorTraitRef<Interner>,
+        fmt: &mut fmt::Formatter<'_>,
+    ) -> Result<(), fmt::Error> {
+        write!(fmt, "{:?}", separator_trait_ref.debug(&Interner))
+    }
+}
+
+mod unsafe_tls {
+    use super::DebugContext;
+    use crate::db::HirDatabase;
+    use scoped_tls::scoped_thread_local;
+
+    scoped_thread_local!(static PROGRAM: DebugContext);
+
+    pub fn with_current_program<R>(
+        op: impl for<'a> FnOnce(Option<&'a DebugContext<'a>>) -> R,
+    ) -> R {
+        if PROGRAM.is_set() {
+            PROGRAM.with(|prog| op(Some(prog)))
+        } else {
+            op(None)
+        }
+    }
+
+    pub fn set_current_program<OP, R>(p: &dyn HirDatabase, op: OP) -> R
+    where
+        OP: FnOnce() -> R,
+    {
+        let ctx = DebugContext(p);
+        // we're transmuting the lifetime in the DebugContext to static. This is
+        // fine because we only keep the reference for the lifetime of this
+        // function, *and* the only way to access the context is through
+        // `with_current_program`, which hides the lifetime through the `for`
+        // type.
+        let static_p: &DebugContext<'static> =
+            unsafe { std::mem::transmute::<&DebugContext, &DebugContext<'static>>(&ctx) };
+        PROGRAM.set(static_p, || op())
+    }
+}
diff --git a/crates/ra_ide/src/completion/complete_fn_param.rs b/crates/ra_ide/src/completion/complete_fn_param.rs
index 62ae5ccb4..f84b559fc 100644
--- a/crates/ra_ide/src/completion/complete_fn_param.rs
+++ b/crates/ra_ide/src/completion/complete_fn_param.rs
@@ -1,6 +1,9 @@
 //! FIXME: write short doc here
 
-use ra_syntax::{ast, match_ast, AstNode};
+use ra_syntax::{
+    ast::{self, ModuleItemOwner},
+    match_ast, AstNode,
+};
 use rustc_hash::FxHashMap;
 
 use crate::completion::{CompletionContext, CompletionItem, CompletionKind, Completions};
@@ -16,11 +19,19 @@ pub(super) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
 
     let mut params = FxHashMap::default();
     for node in ctx.token.parent().ancestors() {
-        match_ast! {
+        let items = match_ast! {
             match node {
-                ast::SourceFile(it) => process(it, &mut params),
-                ast::ItemList(it) => process(it, &mut params),
-                _ => (),
+                ast::SourceFile(it) => it.items(),
+                ast::ItemList(it) => it.items(),
+                _ => continue,
+            }
+        };
+        for item in items {
+            if let ast::ModuleItem::FnDef(func) = item {
+                func.param_list().into_iter().flat_map(|it| it.params()).for_each(|param| {
+                    let text = param.syntax().text().to_string();
+                    params.entry(text).or_insert((0, param)).0 += 1;
+                })
             }
         }
     }
@@ -39,15 +50,6 @@ pub(super) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
                 .lookup_by(lookup)
                 .add_to(acc)
         });
-
-    fn process<N: ast::FnDefOwner>(node: N, params: &mut FxHashMap<String, (u32, ast::Param)>) {
-        node.functions().filter_map(|it| it.param_list()).flat_map(|it| it.params()).for_each(
-            |param| {
-                let text = param.syntax().text().to_string();
-                params.entry(text).or_insert((0, param)).0 += 1;
-            },
-        )
-    }
 }
 
 #[cfg(test)]
diff --git a/crates/ra_ide/src/completion/complete_trait_impl.rs b/crates/ra_ide/src/completion/complete_trait_impl.rs
index ded1ff3bc..fab02945c 100644
--- a/crates/ra_ide/src/completion/complete_trait_impl.rs
+++ b/crates/ra_ide/src/completion/complete_trait_impl.rs
@@ -35,7 +35,7 @@ use hir::{self, Docs, HasSource};
 use ra_assists::utils::get_missing_impl_items;
 use ra_syntax::{
     ast::{self, edit, ImplDef},
-    AstNode, SyntaxKind, SyntaxNode, TextRange,
+    AstNode, SyntaxKind, SyntaxNode, TextRange, T,
 };
 use ra_text_edit::TextEdit;
 
@@ -204,7 +204,7 @@ fn make_const_compl_syntax(const_: &ast::ConstDef) -> String {
     let end = const_
         .syntax()
         .children_with_tokens()
-        .find(|s| s.kind() == SyntaxKind::SEMI || s.kind() == SyntaxKind::EQ)
+        .find(|s| s.kind() == T![;] || s.kind() == T![=])
         .map_or(const_end, |f| f.text_range().start());
 
     let len = end - start;
diff --git a/crates/ra_ide/src/completion/completion_context.rs b/crates/ra_ide/src/completion/completion_context.rs
index 0e34d85db..6637afaf7 100644
--- a/crates/ra_ide/src/completion/completion_context.rs
+++ b/crates/ra_ide/src/completion/completion_context.rs
@@ -191,8 +191,8 @@ impl<'a> CompletionContext<'a> {
             if let Some(bind_pat) = name.syntax().ancestors().find_map(ast::BindPat::cast) {
                 self.is_pat_binding_or_const = true;
                 if bind_pat.at_token().is_some()
-                    || bind_pat.ref_kw_token().is_some()
-                    || bind_pat.mut_kw_token().is_some()
+                    || bind_pat.ref_token().is_some()
+                    || bind_pat.mut_token().is_some()
                 {
                     self.is_pat_binding_or_const = false;
                 }
diff --git a/crates/ra_ide/src/inlay_hints.rs b/crates/ra_ide/src/inlay_hints.rs
index 4b133b19b..da9f55a69 100644
--- a/crates/ra_ide/src/inlay_hints.rs
+++ b/crates/ra_ide/src/inlay_hints.rs
@@ -1,4 +1,4 @@
-//! FIXME: write short doc here
+//! This module defines multiple types of inlay hints and their visibility
 
 use hir::{Adt, HirDisplay, Semantics, Type};
 use ra_ide_db::RootDatabase;
@@ -235,8 +235,7 @@ fn should_show_param_hint(
     param_name: &str,
     argument: &ast::Expr,
 ) -> bool {
-    let argument_string = argument.syntax().to_string();
-    if param_name.is_empty() || argument_string.ends_with(param_name) {
+    if param_name.is_empty() || is_argument_similar_to_param(argument, param_name) {
         return false;
     }
 
@@ -245,14 +244,37 @@ fn should_show_param_hint(
     } else {
         fn_signature.parameters.len()
     };
+
     // avoid displaying hints for common functions like map, filter, etc.
-    if parameters_len == 1 && (param_name.len() == 1 || param_name == "predicate") {
+    // or other obvious words used in std
+    if parameters_len == 1 && is_obvious_param(param_name) {
         return false;
     }
-
     true
 }
 
+fn is_argument_similar_to_param(argument: &ast::Expr, param_name: &str) -> bool {
+    let argument_string = remove_ref(argument.clone()).syntax().to_string();
+    argument_string.starts_with(&param_name) || argument_string.ends_with(&param_name)
+}
+
+fn remove_ref(expr: ast::Expr) -> ast::Expr {
+    if let ast::Expr::RefExpr(ref_expr) = &expr {
+        if let Some(inner) = ref_expr.expr() {
+            return inner;
+        }
+    }
+    expr
+}
+
+fn is_obvious_param(param_name: &str) -> bool {
+    let is_obvious_param_name = match param_name {
+        "predicate" | "value" | "pat" | "rhs" | "other" => true,
+        _ => false,
+    };
+    param_name.len() == 1 || is_obvious_param_name
+}
+
 fn get_fn_signature(sema: &Semantics<RootDatabase>, expr: &ast::Expr) -> Option<FunctionSignature> {
     match expr {
         ast::Expr::CallExpr(expr) => {
@@ -1059,9 +1081,18 @@ impl Test {
         self
     }
 
+    fn field(self, value: i32) -> Self {
+        self
+    }
+
     fn no_hints_expected(&self, _: i32, test_var: i32) {}
 }
 
+struct Param {}
+
+fn different_order(param: &Param) {}
+fn different_order_mut(param: &mut Param) {}
+
 fn main() {
     let container: TestVarContainer = TestVarContainer { test_var: 42 };
     let test: Test = Test {};
@@ -1069,11 +1100,20 @@ fn main() {
     map(22);
     filter(33);
 
-    let test_processed: Test = test.map(1).filter(2);
+    let test_processed: Test = test.map(1).filter(2).field(3);
 
     let test_var: i32 = 55;
     test_processed.no_hints_expected(22, test_var);
     test_processed.no_hints_expected(33, container.test_var);
+
+    let param_begin: Param = Param {};
+    different_order(&param_begin);
+    different_order(&mut param_begin);
+
+    let a: f64 = 7.0;
+    let b: f64 = 4.0;
+    let _: f64 = a.div_euclid(b);
+    let _: f64 = a.abs_sub(b);
 }"#,
         );
 
diff --git a/crates/ra_ide/src/references.rs b/crates/ra_ide/src/references.rs
index ad6fd50aa..7d0544ff4 100644
--- a/crates/ra_ide/src/references.rs
+++ b/crates/ra_ide/src/references.rs
@@ -152,7 +152,7 @@ fn decl_access(def: &Definition, syntax: &SyntaxNode, range: TextRange) -> Optio
     if stmt.initializer().is_some() {
         let pat = stmt.pat()?;
         if let ast::Pat::BindPat(it) = pat {
-            if it.mut_kw_token().is_some() {
+            if it.mut_token().is_some() {
                 return Some(ReferenceAccess::Write);
             }
         }
diff --git a/crates/ra_ide/src/syntax_tree.rs b/crates/ra_ide/src/syntax_tree.rs
index f58e436d1..5842ae2e8 100644
--- a/crates/ra_ide/src/syntax_tree.rs
+++ b/crates/ra_ide/src/syntax_tree.rs
@@ -165,7 +165,7 @@ SOURCE_FILE@[0; 60)
               PATH_SEGMENT@[16; 22)
                 NAME_REF@[16; 22)
                   IDENT@[16; 22) "assert"
-            EXCL@[22; 23) "!"
+            BANG@[22; 23) "!"
             TOKEN_TREE@[23; 57)
               L_PAREN@[23; 24) "("
               STRING@[24; 52) "\"\n    fn foo() {\n     ..."
@@ -173,7 +173,7 @@ SOURCE_FILE@[0; 60)
               WHITESPACE@[53; 54) " "
               STRING@[54; 56) "\"\""
               R_PAREN@[56; 57) ")"
-          SEMI@[57; 58) ";"
+          SEMICOLON@[57; 58) ";"
         WHITESPACE@[58; 59) "\n"
         R_CURLY@[59; 60) "}"
 "#
@@ -226,7 +226,7 @@ EXPR_STMT@[16; 58)
       PATH_SEGMENT@[16; 22)
         NAME_REF@[16; 22)
           IDENT@[16; 22) "assert"
-    EXCL@[22; 23) "!"
+    BANG@[22; 23) "!"
     TOKEN_TREE@[23; 57)
       L_PAREN@[23; 24) "("
       STRING@[24; 52) "\"\n    fn foo() {\n     ..."
@@ -234,7 +234,7 @@ EXPR_STMT@[16; 58)
       WHITESPACE@[53; 54) " "
       STRING@[54; 56) "\"\""
       R_PAREN@[56; 57) ")"
-  SEMI@[57; 58) ";"
+  SEMICOLON@[57; 58) ";"
 "#
             .trim()
         );
diff --git a/crates/ra_ide/src/typing.rs b/crates/ra_ide/src/typing.rs
index 71d2bcb04..f55cd3bf5 100644
--- a/crates/ra_ide/src/typing.rs
+++ b/crates/ra_ide/src/typing.rs
@@ -63,7 +63,7 @@ fn on_char_typed_inner(
 fn on_eq_typed(file: &SourceFile, offset: TextUnit) -> Option<SingleFileChange> {
     assert_eq!(file.syntax().text().char_at(offset), Some('='));
     let let_stmt: ast::LetStmt = find_node_at_offset(file.syntax(), offset)?;
-    if let_stmt.semi_token().is_some() {
+    if let_stmt.semicolon_token().is_some() {
         return None;
     }
     if let Some(expr) = let_stmt.initializer() {
diff --git a/crates/ra_mbe/src/syntax_bridge.rs b/crates/ra_mbe/src/syntax_bridge.rs
index 8e8ae2b29..9fb5cb058 100644
--- a/crates/ra_mbe/src/syntax_bridge.rs
+++ b/crates/ra_mbe/src/syntax_bridge.rs
@@ -137,21 +137,23 @@ impl TokenMap {
         token_id: tt::TokenId,
         open_relative_range: TextRange,
         close_relative_range: TextRange,
-    ) {
+    ) -> usize {
+        let res = self.entries.len();
         self.entries
             .push((token_id, TokenTextRange::Delimiter(open_relative_range, close_relative_range)));
+        res
     }
 
-    fn update_close_delim(&mut self, token_id: tt::TokenId, close_relative_range: TextRange) {
-        if let Some(entry) = self.entries.iter_mut().find(|(tid, _)| *tid == token_id) {
-            if let TokenTextRange::Delimiter(dim, _) = entry.1 {
-                entry.1 = TokenTextRange::Delimiter(dim, close_relative_range);
-            }
+    fn update_close_delim(&mut self, idx: usize, close_relative_range: TextRange) {
+        let (_, token_text_range) = &mut self.entries[idx];
+        if let TokenTextRange::Delimiter(dim, _) = token_text_range {
+            *token_text_range = TokenTextRange::Delimiter(*dim, close_relative_range);
         }
     }
 
-    fn remove_delim(&mut self, token_id: tt::TokenId) {
-        self.entries.retain(|(tid, _)| *tid != token_id);
+    fn remove_delim(&mut self, idx: usize) {
+        // FIXME: This could be accidently quadratic
+        self.entries.remove(idx);
     }
 }
 
@@ -238,24 +240,24 @@ impl TokenIdAlloc {
         token_id
     }
 
-    fn open_delim(&mut self, open_abs_range: TextRange) -> tt::TokenId {
+    fn open_delim(&mut self, open_abs_range: TextRange) -> (tt::TokenId, usize) {
         let token_id = tt::TokenId(self.next_id);
         self.next_id += 1;
-        self.map.insert_delim(
+        let idx = self.map.insert_delim(
             token_id,
             open_abs_range - self.global_offset,
             open_abs_range - self.global_offset,
         );
-        token_id
+        (token_id, idx)
     }
 
-    fn close_delim(&mut self, id: tt::TokenId, close_abs_range: Option<TextRange>) {
+    fn close_delim(&mut self, idx: usize, close_abs_range: Option<TextRange>) {
         match close_abs_range {
             None => {
-                self.map.remove_delim(id);
+                self.map.remove_delim(idx);
             }
             Some(close) => {
-                self.map.update_close_delim(id, close - self.global_offset);
+                self.map.update_close_delim(idx, close - self.global_offset);
             }
         }
     }
@@ -322,7 +324,7 @@ trait TokenConvertor {
 
             if let Some((kind, closed)) = delim {
                 let mut subtree = tt::Subtree::default();
-                let id = self.id_alloc().open_delim(range);
+                let (id, idx) = self.id_alloc().open_delim(range);
                 subtree.delimiter = Some(tt::Delimiter { kind, id });
 
                 while self.peek().map(|it| it.kind() != closed).unwrap_or(false) {
@@ -331,7 +333,7 @@ trait TokenConvertor {
                 let last_range = match self.bump() {
                     None => {
                         // For error resilience, we insert an char punct for the opening delim here
-                        self.id_alloc().close_delim(id, None);
+                        self.id_alloc().close_delim(idx, None);
                         let leaf: tt::Leaf = tt::Punct {
                             id: self.id_alloc().alloc(range),
                             char: token.to_char().unwrap(),
@@ -344,7 +346,7 @@ trait TokenConvertor {
                     }
                     Some(it) => it.1,
                 };
-                self.id_alloc().close_delim(id, Some(last_range));
+                self.id_alloc().close_delim(idx, Some(last_range));
                 subtree.into()
             } else {
                 let spacing = match self.peek() {
diff --git a/crates/ra_mbe/src/tests.rs b/crates/ra_mbe/src/tests.rs
index 1ef6f6eed..5d1274d21 100644
--- a/crates/ra_mbe/src/tests.rs
+++ b/crates/ra_mbe/src/tests.rs
@@ -252,7 +252,7 @@ fn test_expr_order() {
             STAR@[11; 12) "*"
             LITERAL@[12; 13)
               INT_NUMBER@[12; 13) "2"
-          SEMI@[13; 14) ";"
+          SEMICOLON@[13; 14) ";"
         R_CURLY@[14; 15) "}""#,
     );
 }
@@ -605,7 +605,7 @@ fn test_tt_to_stmts() {
     EQ@[4; 5) "="
     LITERAL@[5; 6)
       INT_NUMBER@[5; 6) "0"
-    SEMI@[6; 7) ";"
+    SEMICOLON@[6; 7) ";"
   EXPR_STMT@[7; 14)
     BIN_EXPR@[7; 13)
       PATH_EXPR@[7; 8)
@@ -620,7 +620,7 @@ fn test_tt_to_stmts() {
         PLUS@[11; 12) "+"
         LITERAL@[12; 13)
           INT_NUMBER@[12; 13) "1"
-    SEMI@[13; 14) ";"
+    SEMICOLON@[13; 14) ";"
   EXPR_STMT@[14; 15)
     PATH_EXPR@[14; 15)
       PATH@[14; 15)
@@ -953,7 +953,7 @@ fn test_tt_composite2() {
       PATH_SEGMENT@[0; 3)
         NAME_REF@[0; 3)
           IDENT@[0; 3) "abs"
-    EXCL@[3; 4) "!"
+    BANG@[3; 4) "!"
     TOKEN_TREE@[4; 10)
       L_PAREN@[4; 5) "("
       EQ@[5; 6) "="
@@ -1073,14 +1073,14 @@ fn test_vec() {
               PATH_SEGMENT@[9; 12)
                 NAME_REF@[9; 12)
                   IDENT@[9; 12) "Vec"
-            COLONCOLON@[12; 14) "::"
+            COLON2@[12; 14) "::"
             PATH_SEGMENT@[14; 17)
               NAME_REF@[14; 17)
                 IDENT@[14; 17) "new"
         ARG_LIST@[17; 19)
           L_PAREN@[17; 18) "("
           R_PAREN@[18; 19) ")"
-      SEMI@[19; 20) ";"
+      SEMICOLON@[19; 20) ";"
     EXPR_STMT@[20; 33)
       METHOD_CALL_EXPR@[20; 32)
         PATH_EXPR@[20; 21)
@@ -1096,7 +1096,7 @@ fn test_vec() {
           LITERAL@[27; 31)
             INT_NUMBER@[27; 31) "1u32"
           R_PAREN@[31; 32) ")"
-      SEMI@[32; 33) ";"
+      SEMICOLON@[32; 33) ";"
     EXPR_STMT@[33; 43)
       METHOD_CALL_EXPR@[33; 42)
         PATH_EXPR@[33; 34)
@@ -1112,7 +1112,7 @@ fn test_vec() {
           LITERAL@[40; 41)
             INT_NUMBER@[40; 41) "2"
           R_PAREN@[41; 42) ")"
-      SEMI@[42; 43) ";"
+      SEMICOLON@[42; 43) ";"
     PATH_EXPR@[43; 44)
       PATH@[43; 44)
         PATH_SEGMENT@[43; 44)
@@ -1760,7 +1760,7 @@ fn test_no_space_after_semi_colon() {
     MOD_KW@[21; 24) "mod"
     NAME@[24; 25)
       IDENT@[24; 25) "m"
-    SEMI@[25; 26) ";"
+    SEMICOLON@[25; 26) ";"
   MODULE@[26; 52)
     ATTR@[26; 47)
       POUND@[26; 27) "#"
@@ -1779,7 +1779,7 @@ fn test_no_space_after_semi_colon() {
     MOD_KW@[47; 50) "mod"
     NAME@[50; 51)
       IDENT@[50; 51) "f"
-    SEMI@[51; 52) ";""###,
+    SEMICOLON@[51; 52) ";""###,
     );
 }
 
diff --git a/crates/ra_parser/src/grammar/expressions.rs b/crates/ra_parser/src/grammar/expressions.rs
index c486c0211..a1bd53063 100644
--- a/crates/ra_parser/src/grammar/expressions.rs
+++ b/crates/ra_parser/src/grammar/expressions.rs
@@ -339,7 +339,8 @@ fn expr_bp(p: &mut Parser, mut r: Restrictions, bp: u8) -> (Option<CompletedMark
     (Some(lhs), BlockLike::NotBlock)
 }
 
-const LHS_FIRST: TokenSet = atom::ATOM_EXPR_FIRST.union(token_set![AMP, STAR, EXCL, DOT, MINUS]);
+const LHS_FIRST: TokenSet =
+    atom::ATOM_EXPR_FIRST.union(token_set![T![&], T![*], T![!], T![.], T![-]]);
 
 fn lhs(p: &mut Parser, r: Restrictions) -> Option<(CompletedMarker, BlockLike)> {
     let m;
diff --git a/crates/ra_parser/src/grammar/types.rs b/crates/ra_parser/src/grammar/types.rs
index 386969d2d..fe1a039cb 100644
--- a/crates/ra_parser/src/grammar/types.rs
+++ b/crates/ra_parser/src/grammar/types.rs
@@ -3,8 +3,19 @@
 use super::*;
 
 pub(super) const TYPE_FIRST: TokenSet = paths::PATH_FIRST.union(token_set![
-    L_PAREN, EXCL, STAR, L_BRACK, AMP, UNDERSCORE, FN_KW, UNSAFE_KW, EXTERN_KW, FOR_KW, IMPL_KW,
-    DYN_KW, L_ANGLE,
+    T!['('],
+    T!['['],
+    T![<],
+    T![!],
+    T![*],
+    T![&],
+    T![_],
+    T![fn],
+    T![unsafe],
+    T![extern],
+    T![for],
+    T![impl],
+    T![dyn],
 ]);
 
 const TYPE_RECOVERY_SET: TokenSet = token_set![R_PAREN, COMMA, L_DOLLAR];
diff --git a/crates/ra_parser/src/syntax_kind/generated.rs b/crates/ra_parser/src/syntax_kind/generated.rs
index 004f4e564..524e7d784 100644
--- a/crates/ra_parser/src/syntax_kind/generated.rs
+++ b/crates/ra_parser/src/syntax_kind/generated.rs
@@ -9,7 +9,7 @@ pub enum SyntaxKind {
     TOMBSTONE,
     #[doc(hidden)]
     EOF,
-    SEMI,
+    SEMICOLON,
     COMMA,
     L_PAREN,
     R_PAREN,
@@ -33,15 +33,15 @@ pub enum SyntaxKind {
     PERCENT,
     UNDERSCORE,
     DOT,
-    DOTDOT,
-    DOTDOTDOT,
-    DOTDOTEQ,
+    DOT2,
+    DOT3,
+    DOT2EQ,
     COLON,
-    COLONCOLON,
+    COLON2,
     EQ,
-    EQEQ,
+    EQ2,
     FAT_ARROW,
-    EXCL,
+    BANG,
     NEQ,
     MINUS,
     THIN_ARROW,
@@ -55,8 +55,8 @@ pub enum SyntaxKind {
     SLASHEQ,
     STAREQ,
     PERCENTEQ,
-    AMPAMP,
-    PIPEPIPE,
+    AMP2,
+    PIPE2,
     SHL,
     SHR,
     SHLEQ,
@@ -265,12 +265,12 @@ impl SyntaxKind {
     }
     pub fn is_punct(self) -> bool {
         match self {
-            SEMI | COMMA | L_PAREN | R_PAREN | L_CURLY | R_CURLY | L_BRACK | R_BRACK | L_ANGLE
-            | R_ANGLE | AT | POUND | TILDE | QUESTION | DOLLAR | AMP | PIPE | PLUS | STAR
-            | SLASH | CARET | PERCENT | UNDERSCORE | DOT | DOTDOT | DOTDOTDOT | DOTDOTEQ
-            | COLON | COLONCOLON | EQ | EQEQ | FAT_ARROW | EXCL | NEQ | MINUS | THIN_ARROW
-            | LTEQ | GTEQ | PLUSEQ | MINUSEQ | PIPEEQ | AMPEQ | CARETEQ | SLASHEQ | STAREQ
-            | PERCENTEQ | AMPAMP | PIPEPIPE | SHL | SHR | SHLEQ | SHREQ => true,
+            SEMICOLON | COMMA | L_PAREN | R_PAREN | L_CURLY | R_CURLY | L_BRACK | R_BRACK
+            | L_ANGLE | R_ANGLE | AT | POUND | TILDE | QUESTION | DOLLAR | AMP | PIPE | PLUS
+            | STAR | SLASH | CARET | PERCENT | UNDERSCORE | DOT | DOT2 | DOT3 | DOT2EQ | COLON
+            | COLON2 | EQ | EQ2 | FAT_ARROW | BANG | NEQ | MINUS | THIN_ARROW | LTEQ | GTEQ
+            | PLUSEQ | MINUSEQ | PIPEEQ | AMPEQ | CARETEQ | SLASHEQ | STAREQ | PERCENTEQ | AMP2
+            | PIPE2 | SHL | SHR | SHLEQ | SHREQ => true,
             _ => false,
         }
     }
@@ -329,7 +329,7 @@ impl SyntaxKind {
     }
     pub fn from_char(c: char) -> Option<SyntaxKind> {
         let tok = match c {
-            ';' => SEMI,
+            ';' => SEMICOLON,
             ',' => COMMA,
             '(' => L_PAREN,
             ')' => R_PAREN,
@@ -355,7 +355,7 @@ impl SyntaxKind {
             '.' => DOT,
             ':' => COLON,
             '=' => EQ,
-            '!' => EXCL,
+            '!' => BANG,
             '-' => MINUS,
             _ => return None,
         };
@@ -363,296 +363,4 @@ impl SyntaxKind {
     }
 }
 #[macro_export]
-macro_rules! T {
-    ( ; ) => {
-        $crate::SyntaxKind::SEMI
-    };
-    ( , ) => {
-        $crate::SyntaxKind::COMMA
-    };
-    ( '(' ) => {
-        $crate::SyntaxKind::L_PAREN
-    };
-    ( ')' ) => {
-        $crate::SyntaxKind::R_PAREN
-    };
-    ( '{' ) => {
-        $crate::SyntaxKind::L_CURLY
-    };
-    ( '}' ) => {
-        $crate::SyntaxKind::R_CURLY
-    };
-    ( '[' ) => {
-        $crate::SyntaxKind::L_BRACK
-    };
-    ( ']' ) => {
-        $crate::SyntaxKind::R_BRACK
-    };
-    ( < ) => {
-        $crate::SyntaxKind::L_ANGLE
-    };
-    ( > ) => {
-        $crate::SyntaxKind::R_ANGLE
-    };
-    ( @ ) => {
-        $crate::SyntaxKind::AT
-    };
-    ( # ) => {
-        $crate::SyntaxKind::POUND
-    };
-    ( ~ ) => {
-        $crate::SyntaxKind::TILDE
-    };
-    ( ? ) => {
-        $crate::SyntaxKind::QUESTION
-    };
-    ( $ ) => {
-        $crate::SyntaxKind::DOLLAR
-    };
-    ( & ) => {
-        $crate::SyntaxKind::AMP
-    };
-    ( | ) => {
-        $crate::SyntaxKind::PIPE
-    };
-    ( + ) => {
-        $crate::SyntaxKind::PLUS
-    };
-    ( * ) => {
-        $crate::SyntaxKind::STAR
-    };
-    ( / ) => {
-        $crate::SyntaxKind::SLASH
-    };
-    ( ^ ) => {
-        $crate::SyntaxKind::CARET
-    };
-    ( % ) => {
-        $crate::SyntaxKind::PERCENT
-    };
-    ( _ ) => {
-        $crate::SyntaxKind::UNDERSCORE
-    };
-    ( . ) => {
-        $crate::SyntaxKind::DOT
-    };
-    ( .. ) => {
-        $crate::SyntaxKind::DOTDOT
-    };
-    ( ... ) => {
-        $crate::SyntaxKind::DOTDOTDOT
-    };
-    ( ..= ) => {
-        $crate::SyntaxKind::DOTDOTEQ
-    };
-    ( : ) => {
-        $crate::SyntaxKind::COLON
-    };
-    ( :: ) => {
-        $crate::SyntaxKind::COLONCOLON
-    };
-    ( = ) => {
-        $crate::SyntaxKind::EQ
-    };
-    ( == ) => {
-        $crate::SyntaxKind::EQEQ
-    };
-    ( => ) => {
-        $crate::SyntaxKind::FAT_ARROW
-    };
-    ( ! ) => {
-        $crate::SyntaxKind::EXCL
-    };
-    ( != ) => {
-        $crate::SyntaxKind::NEQ
-    };
-    ( - ) => {
-        $crate::SyntaxKind::MINUS
-    };
-    ( -> ) => {
-        $crate::SyntaxKind::THIN_ARROW
-    };
-    ( <= ) => {
-        $crate::SyntaxKind::LTEQ
-    };
-    ( >= ) => {
-        $crate::SyntaxKind::GTEQ
-    };
-    ( += ) => {
-        $crate::SyntaxKind::PLUSEQ
-    };
-    ( -= ) => {
-        $crate::SyntaxKind::MINUSEQ
-    };
-    ( |= ) => {
-        $crate::SyntaxKind::PIPEEQ
-    };
-    ( &= ) => {
-        $crate::SyntaxKind::AMPEQ
-    };
-    ( ^= ) => {
-        $crate::SyntaxKind::CARETEQ
-    };
-    ( /= ) => {
-        $crate::SyntaxKind::SLASHEQ
-    };
-    ( *= ) => {
-        $crate::SyntaxKind::STAREQ
-    };
-    ( %= ) => {
-        $crate::SyntaxKind::PERCENTEQ
-    };
-    ( && ) => {
-        $crate::SyntaxKind::AMPAMP
-    };
-    ( || ) => {
-        $crate::SyntaxKind::PIPEPIPE
-    };
-    ( << ) => {
-        $crate::SyntaxKind::SHL
-    };
-    ( >> ) => {
-        $crate::SyntaxKind::SHR
-    };
-    ( <<= ) => {
-        $crate::SyntaxKind::SHLEQ
-    };
-    ( >>= ) => {
-        $crate::SyntaxKind::SHREQ
-    };
-    ( as ) => {
-        $crate::SyntaxKind::AS_KW
-    };
-    ( async ) => {
-        $crate::SyntaxKind::ASYNC_KW
-    };
-    ( await ) => {
-        $crate::SyntaxKind::AWAIT_KW
-    };
-    ( box ) => {
-        $crate::SyntaxKind::BOX_KW
-    };
-    ( break ) => {
-        $crate::SyntaxKind::BREAK_KW
-    };
-    ( const ) => {
-        $crate::SyntaxKind::CONST_KW
-    };
-    ( continue ) => {
-        $crate::SyntaxKind::CONTINUE_KW
-    };
-    ( crate ) => {
-        $crate::SyntaxKind::CRATE_KW
-    };
-    ( dyn ) => {
-        $crate::SyntaxKind::DYN_KW
-    };
-    ( else ) => {
-        $crate::SyntaxKind::ELSE_KW
-    };
-    ( enum ) => {
-        $crate::SyntaxKind::ENUM_KW
-    };
-    ( extern ) => {
-        $crate::SyntaxKind::EXTERN_KW
-    };
-    ( false ) => {
-        $crate::SyntaxKind::FALSE_KW
-    };
-    ( fn ) => {
-        $crate::SyntaxKind::FN_KW
-    };
-    ( for ) => {
-        $crate::SyntaxKind::FOR_KW
-    };
-    ( if ) => {
-        $crate::SyntaxKind::IF_KW
-    };
-    ( impl ) => {
-        $crate::SyntaxKind::IMPL_KW
-    };
-    ( in ) => {
-        $crate::SyntaxKind::IN_KW
-    };
-    ( let ) => {
-        $crate::SyntaxKind::LET_KW
-    };
-    ( loop ) => {
-        $crate::SyntaxKind::LOOP_KW
-    };
-    ( macro ) => {
-        $crate::SyntaxKind::MACRO_KW
-    };
-    ( match ) => {
-        $crate::SyntaxKind::MATCH_KW
-    };
-    ( mod ) => {
-        $crate::SyntaxKind::MOD_KW
-    };
-    ( move ) => {
-        $crate::SyntaxKind::MOVE_KW
-    };
-    ( mut ) => {
-        $crate::SyntaxKind::MUT_KW
-    };
-    ( pub ) => {
-        $crate::SyntaxKind::PUB_KW
-    };
-    ( ref ) => {
-        $crate::SyntaxKind::REF_KW
-    };
-    ( return ) => {
-        $crate::SyntaxKind::RETURN_KW
-    };
-    ( self ) => {
-        $crate::SyntaxKind::SELF_KW
-    };
-    ( static ) => {
-        $crate::SyntaxKind::STATIC_KW
-    };
-    ( struct ) => {
-        $crate::SyntaxKind::STRUCT_KW
-    };
-    ( super ) => {
-        $crate::SyntaxKind::SUPER_KW
-    };
-    ( trait ) => {
-        $crate::SyntaxKind::TRAIT_KW
-    };
-    ( true ) => {
-        $crate::SyntaxKind::TRUE_KW
-    };
-    ( try ) => {
-        $crate::SyntaxKind::TRY_KW
-    };
-    ( type ) => {
-        $crate::SyntaxKind::TYPE_KW
-    };
-    ( unsafe ) => {
-        $crate::SyntaxKind::UNSAFE_KW
-    };
-    ( use ) => {
-        $crate::SyntaxKind::USE_KW
-    };
-    ( where ) => {
-        $crate::SyntaxKind::WHERE_KW
-    };
-    ( while ) => {
-        $crate::SyntaxKind::WHILE_KW
-    };
-    ( auto ) => {
-        $crate::SyntaxKind::AUTO_KW
-    };
-    ( default ) => {
-        $crate::SyntaxKind::DEFAULT_KW
-    };
-    ( existential ) => {
-        $crate::SyntaxKind::EXISTENTIAL_KW
-    };
-    ( union ) => {
-        $crate::SyntaxKind::UNION_KW
-    };
-    ( raw ) => {
-        $crate::SyntaxKind::RAW_KW
-    };
-}
+macro_rules ! T { [ ; ] => { $ crate :: SyntaxKind :: SEMICOLON } ; [ , ] => { $ crate :: SyntaxKind :: COMMA } ; [ '(' ] => { $ crate :: SyntaxKind :: L_PAREN } ; [ ')' ] => { $ crate :: SyntaxKind :: R_PAREN } ; [ '{' ] => { $ crate :: SyntaxKind :: L_CURLY } ; [ '}' ] => { $ crate :: SyntaxKind :: R_CURLY } ; [ '[' ] => { $ crate :: SyntaxKind :: L_BRACK } ; [ ']' ] => { $ crate :: SyntaxKind :: R_BRACK } ; [ < ] => { $ crate :: SyntaxKind :: L_ANGLE } ; [ > ] => { $ crate :: SyntaxKind :: R_ANGLE } ; [ @ ] => { $ crate :: SyntaxKind :: AT } ; [ # ] => { $ crate :: SyntaxKind :: POUND } ; [ ~ ] => { $ crate :: SyntaxKind :: TILDE } ; [ ? ] => { $ crate :: SyntaxKind :: QUESTION } ; [ $ ] => { $ crate :: SyntaxKind :: DOLLAR } ; [ & ] => { $ crate :: SyntaxKind :: AMP } ; [ | ] => { $ crate :: SyntaxKind :: PIPE } ; [ + ] => { $ crate :: SyntaxKind :: PLUS } ; [ * ] => { $ crate :: SyntaxKind :: STAR } ; [ / ] => { $ crate :: SyntaxKind :: SLASH } ; [ ^ ] => { $ crate :: SyntaxKind :: CARET } ; [ % ] => { $ crate :: SyntaxKind :: PERCENT } ; [ _ ] => { $ crate :: SyntaxKind :: UNDERSCORE } ; [ . ] => { $ crate :: SyntaxKind :: DOT } ; [ .. ] => { $ crate :: SyntaxKind :: DOT2 } ; [ ... ] => { $ crate :: SyntaxKind :: DOT3 } ; [ ..= ] => { $ crate :: SyntaxKind :: DOT2EQ } ; [ : ] => { $ crate :: SyntaxKind :: COLON } ; [ :: ] => { $ crate :: SyntaxKind :: COLON2 } ; [ = ] => { $ crate :: SyntaxKind :: EQ } ; [ == ] => { $ crate :: SyntaxKind :: EQ2 } ; [ => ] => { $ crate :: SyntaxKind :: FAT_ARROW } ; [ ! ] => { $ crate :: SyntaxKind :: BANG } ; [ != ] => { $ crate :: SyntaxKind :: NEQ } ; [ - ] => { $ crate :: SyntaxKind :: MINUS } ; [ -> ] => { $ crate :: SyntaxKind :: THIN_ARROW } ; [ <= ] => { $ crate :: SyntaxKind :: LTEQ } ; [ >= ] => { $ crate :: SyntaxKind :: GTEQ } ; [ += ] => { $ crate :: SyntaxKind :: PLUSEQ } ; [ -= ] => { $ crate :: SyntaxKind :: MINUSEQ } ; [ |= ] => { $ crate :: SyntaxKind :: PIPEEQ } ; [ &= ] => { $ crate :: SyntaxKind :: AMPEQ } ; [ ^= ] => { $ crate :: SyntaxKind :: CARETEQ } ; [ /= ] => { $ crate :: SyntaxKind :: SLASHEQ } ; [ *= ] => { $ crate :: SyntaxKind :: STAREQ } ; [ %= ] => { $ crate :: SyntaxKind :: PERCENTEQ } ; [ && ] => { $ crate :: SyntaxKind :: AMP2 } ; [ || ] => { $ crate :: SyntaxKind :: PIPE2 } ; [ << ] => { $ crate :: SyntaxKind :: SHL } ; [ >> ] => { $ crate :: SyntaxKind :: SHR } ; [ <<= ] => { $ crate :: SyntaxKind :: SHLEQ } ; [ >>= ] => { $ crate :: SyntaxKind :: SHREQ } ; [ as ] => { $ crate :: SyntaxKind :: AS_KW } ; [ async ] => { $ crate :: SyntaxKind :: ASYNC_KW } ; [ await ] => { $ crate :: SyntaxKind :: AWAIT_KW } ; [ box ] => { $ crate :: SyntaxKind :: BOX_KW } ; [ break ] => { $ crate :: SyntaxKind :: BREAK_KW } ; [ const ] => { $ crate :: SyntaxKind :: CONST_KW } ; [ continue ] => { $ crate :: SyntaxKind :: CONTINUE_KW } ; [ crate ] => { $ crate :: SyntaxKind :: CRATE_KW } ; [ dyn ] => { $ crate :: SyntaxKind :: DYN_KW } ; [ else ] => { $ crate :: SyntaxKind :: ELSE_KW } ; [ enum ] => { $ crate :: SyntaxKind :: ENUM_KW } ; [ extern ] => { $ crate :: SyntaxKind :: EXTERN_KW } ; [ false ] => { $ crate :: SyntaxKind :: FALSE_KW } ; [ fn ] => { $ crate :: SyntaxKind :: FN_KW } ; [ for ] => { $ crate :: SyntaxKind :: FOR_KW } ; [ if ] => { $ crate :: SyntaxKind :: IF_KW } ; [ impl ] => { $ crate :: SyntaxKind :: IMPL_KW } ; [ in ] => { $ crate :: SyntaxKind :: IN_KW } ; [ let ] => { $ crate :: SyntaxKind :: LET_KW } ; [ loop ] => { $ crate :: SyntaxKind :: LOOP_KW } ; [ macro ] => { $ crate :: SyntaxKind :: MACRO_KW } ; [ match ] => { $ crate :: SyntaxKind :: MATCH_KW } ; [ mod ] => { $ crate :: SyntaxKind :: MOD_KW } ; [ move ] => { $ crate :: SyntaxKind :: MOVE_KW } ; [ mut ] => { $ crate :: SyntaxKind :: MUT_KW } ; [ pub ] => { $ crate :: SyntaxKind :: PUB_KW } ; [ ref ] => { $ crate :: SyntaxKind :: REF_KW } ; [ return ] => { $ crate :: SyntaxKind :: RETURN_KW } ; [ self ] => { $ crate :: SyntaxKind :: SELF_KW } ; [ static ] => { $ crate :: SyntaxKind :: STATIC_KW } ; [ struct ] => { $ crate :: SyntaxKind :: STRUCT_KW } ; [ super ] => { $ crate :: SyntaxKind :: SUPER_KW } ; [ trait ] => { $ crate :: SyntaxKind :: TRAIT_KW } ; [ true ] => { $ crate :: SyntaxKind :: TRUE_KW } ; [ try ] => { $ crate :: SyntaxKind :: TRY_KW } ; [ type ] => { $ crate :: SyntaxKind :: TYPE_KW } ; [ unsafe ] => { $ crate :: SyntaxKind :: UNSAFE_KW } ; [ use ] => { $ crate :: SyntaxKind :: USE_KW } ; [ where ] => { $ crate :: SyntaxKind :: WHERE_KW } ; [ while ] => { $ crate :: SyntaxKind :: WHILE_KW } ; [ auto ] => { $ crate :: SyntaxKind :: AUTO_KW } ; [ default ] => { $ crate :: SyntaxKind :: DEFAULT_KW } ; [ existential ] => { $ crate :: SyntaxKind :: EXISTENTIAL_KW } ; [ union ] => { $ crate :: SyntaxKind :: UNION_KW } ; [ raw ] => { $ crate :: SyntaxKind :: RAW_KW } ; [ lifetime ] => { $ crate :: SyntaxKind :: LIFETIME } ; [ ident ] => { $ crate :: SyntaxKind :: IDENT } ; }
diff --git a/crates/ra_prof/src/lib.rs b/crates/ra_prof/src/lib.rs
index 00ea3a9b0..2d4f68f5e 100644
--- a/crates/ra_prof/src/lib.rs
+++ b/crates/ra_prof/src/lib.rs
@@ -113,21 +113,6 @@ pub fn profile(label: Label) -> Profiler {
     })
 }
 
-pub fn print_time(label: Label) -> impl Drop {
-    struct Guard {
-        label: Label,
-        start: Instant,
-    }
-
-    impl Drop for Guard {
-        fn drop(&mut self) {
-            eprintln!("{}: {:?}", self.label, self.start.elapsed())
-        }
-    }
-
-    Guard { label, start: Instant::now() }
-}
-
 pub struct Profiler {
     label: Option<Label>,
     detail: Option<String>,
diff --git a/crates/ra_syntax/src/ast.rs b/crates/ra_syntax/src/ast.rs
index 15a8279f3..99c6b7219 100644
--- a/crates/ra_syntax/src/ast.rs
+++ b/crates/ra_syntax/src/ast.rs
@@ -42,11 +42,6 @@ pub trait AstNode {
     fn syntax(&self) -> &SyntaxNode;
 }
 
-#[test]
-fn assert_ast_is_object_safe() {
-    fn _f(_: &dyn AstNode, _: &dyn NameOwner) {}
-}
-
 /// Like `AstNode`, but wraps tokens rather than interior nodes.
 pub trait AstToken {
     fn can_cast(token: SyntaxKind) -> bool
@@ -64,22 +59,6 @@ pub trait AstToken {
     }
 }
 
-mod support {
-    use super::{AstChildren, AstNode, AstToken, SyntaxNode};
-
-    pub(super) fn child<N: AstNode>(parent: &SyntaxNode) -> Option<N> {
-        parent.children().find_map(N::cast)
-    }
-
-    pub(super) fn children<N: AstNode>(parent: &SyntaxNode) -> AstChildren<N> {
-        AstChildren::new(parent)
-    }
-
-    pub(super) fn token<T: AstToken>(parent: &SyntaxNode) -> Option<T> {
-        parent.children_with_tokens().filter_map(|it| it.into_token()).find_map(T::cast)
-    }
-}
-
 /// An iterator over `SyntaxNode` children of a particular AST type.
 #[derive(Debug, Clone)]
 pub struct AstChildren<N> {
@@ -100,12 +79,25 @@ impl<N: AstNode> Iterator for AstChildren<N> {
     }
 }
 
-fn child_opt<P: AstNode + ?Sized, C: AstNode>(parent: &P) -> Option<C> {
-    children(parent).next()
+mod support {
+    use super::{AstChildren, AstNode, SyntaxKind, SyntaxNode, SyntaxToken};
+
+    pub(super) fn child<N: AstNode>(parent: &SyntaxNode) -> Option<N> {
+        parent.children().find_map(N::cast)
+    }
+
+    pub(super) fn children<N: AstNode>(parent: &SyntaxNode) -> AstChildren<N> {
+        AstChildren::new(parent)
+    }
+
+    pub(super) fn token(parent: &SyntaxNode, kind: SyntaxKind) -> Option<SyntaxToken> {
+        parent.children_with_tokens().filter_map(|it| it.into_token()).find(|it| it.kind() == kind)
+    }
 }
 
-fn children<P: AstNode + ?Sized, C: AstNode>(parent: &P) -> AstChildren<C> {
-    AstChildren::new(parent.syntax())
+#[test]
+fn assert_ast_is_object_safe() {
+    fn _f(_: &dyn AstNode, _: &dyn NameOwner) {}
 }
 
 #[test]
diff --git a/crates/ra_syntax/src/ast/edit.rs b/crates/ra_syntax/src/ast/edit.rs
index 069c6ee82..9e5411ee5 100644
--- a/crates/ra_syntax/src/ast/edit.rs
+++ b/crates/ra_syntax/src/ast/edit.rs
@@ -6,7 +6,7 @@ use std::{iter, ops::RangeInclusive};
 use arrayvec::ArrayVec;
 
 use crate::{
-    algo,
+    algo::{self, neighbor, SyntaxRewriter},
     ast::{
         self,
         make::{self, tokens},
@@ -16,7 +16,6 @@ use crate::{
     SyntaxKind::{ATTR, COMMENT, WHITESPACE},
     SyntaxNode, SyntaxToken, T,
 };
-use algo::{neighbor, SyntaxRewriter};
 
 impl ast::BinExpr {
     #[must_use]
@@ -33,9 +32,9 @@ impl ast::FnDef {
         let mut to_insert: ArrayVec<[SyntaxElement; 2]> = ArrayVec::new();
         let old_body_or_semi: SyntaxElement = if let Some(old_body) = self.body() {
             old_body.syntax().clone().into()
-        } else if let Some(semi) = self.semi_token() {
+        } else if let Some(semi) = self.semicolon_token() {
             to_insert.push(make::tokens::single_space().into());
-            semi.syntax.clone().into()
+            semi.into()
         } else {
             to_insert.push(make::tokens::single_space().into());
             to_insert.push(body.syntax().clone().into());
@@ -99,7 +98,7 @@ impl ast::ItemList {
             None => match self.l_curly_token() {
                 Some(it) => (
                     "    ".to_string() + &leading_indent(self.syntax()).unwrap_or_default(),
-                    InsertPosition::After(it.syntax().clone().into()),
+                    InsertPosition::After(it.into()),
                 ),
                 None => return self.clone(),
             },
@@ -143,7 +142,7 @@ impl ast::RecordFieldList {
         macro_rules! after_l_curly {
             () => {{
                 let anchor = match self.l_curly_token() {
-                    Some(it) => it.syntax().clone().into(),
+                    Some(it) => it.into(),
                     None => return self.clone(),
                 };
                 InsertPosition::After(anchor)
@@ -190,15 +189,15 @@ impl ast::RecordFieldList {
 impl ast::TypeParam {
     #[must_use]
     pub fn remove_bounds(&self) -> ast::TypeParam {
-        let colon = match self.colon() {
+        let colon = match self.colon_token() {
             Some(it) => it,
             None => return self.clone(),
         };
         let end = match self.type_bound_list() {
             Some(it) => it.syntax().clone().into(),
-            None => colon.syntax().clone().into(),
+            None => colon.clone().into(),
         };
-        self.replace_children(colon.syntax().clone().into()..=end, iter::empty())
+        self.replace_children(colon.into()..=end, iter::empty())
     }
 }
 
diff --git a/crates/ra_syntax/src/ast/expr_extensions.rs b/crates/ra_syntax/src/ast/expr_extensions.rs
index 40c8fca3b..93aa3d45f 100644
--- a/crates/ra_syntax/src/ast/expr_extensions.rs
+++ b/crates/ra_syntax/src/ast/expr_extensions.rs
@@ -1,7 +1,7 @@
 //! Various extension methods to ast Expr Nodes, which are hard to code-generate.
 
 use crate::{
-    ast::{self, child_opt, children, AstChildren, AstNode},
+    ast::{self, support, AstChildren, AstNode},
     SmolStr,
     SyntaxKind::*,
     SyntaxToken, T,
@@ -36,7 +36,7 @@ impl ast::IfExpr {
         let res = match self.blocks().nth(1) {
             Some(block) => ElseBranch::Block(block),
             None => {
-                let elif: ast::IfExpr = child_opt(self)?;
+                let elif: ast::IfExpr = support::child(self.syntax())?;
                 ElseBranch::IfExpr(elif)
             }
         };
@@ -44,17 +44,7 @@ impl ast::IfExpr {
     }
 
     fn blocks(&self) -> AstChildren<ast::BlockExpr> {
-        children(self)
-    }
-}
-
-impl ast::RefExpr {
-    pub fn is_mut(&self) -> bool {
-        self.syntax().children_with_tokens().any(|n| n.kind() == T![mut])
-    }
-
-    pub fn raw_token(&self) -> Option<SyntaxToken> {
-        None // FIXME: implement &raw
+        support::children(self.syntax())
     }
 }
 
@@ -212,15 +202,15 @@ impl ast::BinExpr {
     }
 
     pub fn lhs(&self) -> Option<ast::Expr> {
-        children(self).next()
+        support::children(self.syntax()).next()
     }
 
     pub fn rhs(&self) -> Option<ast::Expr> {
-        children(self).nth(1)
+        support::children(self.syntax()).nth(1)
     }
 
     pub fn sub_exprs(&self) -> (Option<ast::Expr>, Option<ast::Expr>) {
-        let mut children = children(self);
+        let mut children = support::children(self.syntax());
         let first = children.next();
         let second = children.next();
         (first, second)
@@ -275,10 +265,10 @@ impl ast::RangeExpr {
 
 impl ast::IndexExpr {
     pub fn base(&self) -> Option<ast::Expr> {
-        children(self).next()
+        support::children(self.syntax()).next()
     }
     pub fn index(&self) -> Option<ast::Expr> {
-        children(self).nth(1)
+        support::children(self.syntax()).nth(1)
     }
 }
 
@@ -291,11 +281,11 @@ impl ast::ArrayExpr {
     pub fn kind(&self) -> ArrayExprKind {
         if self.is_repeat() {
             ArrayExprKind::Repeat {
-                initializer: children(self).next(),
-                repeat: children(self).nth(1),
+                initializer: support::children(self.syntax()).next(),
+                repeat: support::children(self.syntax()).nth(1),
             }
         } else {
-            ArrayExprKind::ElementList(children(self))
+            ArrayExprKind::ElementList(support::children(self.syntax()))
         }
     }
 
diff --git a/crates/ra_syntax/src/ast/extensions.rs b/crates/ra_syntax/src/ast/extensions.rs
index b50a89864..76b7655e6 100644
--- a/crates/ra_syntax/src/ast/extensions.rs
+++ b/crates/ra_syntax/src/ast/extensions.rs
@@ -5,9 +5,7 @@ use itertools::Itertools;
 use ra_parser::SyntaxKind;