Merge branch 'master' of github.com:rust-analyzer/rust-analyzer

322 files changed, 1823 insertions, 160 deletions

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 217f17975..02a3b6228 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -10,7 +10,7 @@ on:
 env:
   CARGO_INCREMENTAL: 0
   CARGO_NET_RETRY: 10
-  RUN_SLOW_TESTS: 1
+  CI: 1
   RUST_BACKTRACE: short
   RUSTFLAGS: -D warnings
   RUSTUP_MAX_RETRIES: 10
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index fd184e8f1..4db122ec7 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -60,6 +60,10 @@ jobs:
       if: matrix.os != 'ubuntu-latest'
       run: cargo xtask dist
 
+    - name: Nightly analysis-stats check
+      if: matrix.os == 'ubuntu-latest' && github.ref != 'refs/heads/release'
+      run: ./dist/rust-analyzer-linux analysis-stats .
+
     - name: Upload artifacts
       uses: actions/upload-artifact@v1
       with:
diff --git a/Cargo.lock b/Cargo.lock
index 91a57bf79..eb9824218 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -995,6 +995,7 @@ dependencies = [
  "ra_prof",
  "ra_syntax",
  "rustc-hash",
+ "smallvec",
  "stdx",
  "test_utils",
 ]
diff --git a/crates/ra_assists/src/lib.rs b/crates/ra_assists/src/lib.rs
index fa3d3913f..c698d6e8c 100644
--- a/crates/ra_assists/src/lib.rs
+++ b/crates/ra_assists/src/lib.rs
@@ -5,6 +5,11 @@
 //! certain context. For example, if the cursor is over `,`, a "swap `,`" assist
 //! becomes available.
 
+#[allow(unused)]
+macro_rules! eprintln {
+    ($($tt:tt)*) => { stdx::eprintln!($($tt)*) };
+}
+
 mod assist_ctx;
 mod marks;
 #[cfg(test)]
diff --git a/crates/ra_hir/src/diagnostics.rs b/crates/ra_hir/src/diagnostics.rs
index a9040ea3d..c82883d0c 100644
--- a/crates/ra_hir/src/diagnostics.rs
+++ b/crates/ra_hir/src/diagnostics.rs
@@ -1,4 +1,4 @@
 //! FIXME: write short doc here
 pub use hir_def::diagnostics::UnresolvedModule;
 pub use hir_expand::diagnostics::{AstDiagnostic, Diagnostic, DiagnosticSink};
-pub use hir_ty::diagnostics::{MissingFields, MissingOkInTailExpr, NoSuchField};
+pub use hir_ty::diagnostics::{MissingFields, MissingMatchArms, MissingOkInTailExpr, NoSuchField};
diff --git a/crates/ra_hir/src/semantics.rs b/crates/ra_hir/src/semantics.rs
index 16a5fe968..2ad231d36 100644
--- a/crates/ra_hir/src/semantics.rs
+++ b/crates/ra_hir/src/semantics.rs
@@ -9,6 +9,7 @@ use hir_def::{
     AsMacroCall, TraitId,
 };
 use hir_expand::ExpansionInfo;
+use itertools::Itertools;
 use ra_db::{FileId, FileRange};
 use ra_prof::profile;
 use ra_syntax::{
@@ -135,7 +136,6 @@ impl<'db, DB: HirDatabase> Semantics<'db, DB> {
         node: &SyntaxNode,
         offset: TextUnit,
     ) -> impl Iterator<Item = SyntaxNode> + '_ {
-        use itertools::Itertools;
         node.token_at_offset(offset)
             .map(|token| self.ancestors_with_macros(token.parent()))
             .kmerge_by(|node1, node2| node1.text_range().len() < node2.text_range().len())
diff --git a/crates/ra_hir/src/semantics/source_to_def.rs b/crates/ra_hir/src/semantics/source_to_def.rs
index 8843f2835..66724919b 100644
--- a/crates/ra_hir/src/semantics/source_to_def.rs
+++ b/crates/ra_hir/src/semantics/source_to_def.rs
@@ -208,12 +208,12 @@ impl SourceToDefCtx<'_, '_> {
         for container in src.cloned().ancestors_with_macros(self.db.upcast()).skip(1) {
             let res: GenericDefId = match_ast! {
                 match (container.value) {
-                    ast::FnDef(it) => { self.fn_to_def(container.with_value(it))?.into() },
-                    ast::StructDef(it) => { self.struct_to_def(container.with_value(it))?.into() },
-                    ast::EnumDef(it) => { self.enum_to_def(container.with_value(it))?.into() },
-                    ast::TraitDef(it) => { self.trait_to_def(container.with_value(it))?.into() },
-                    ast::TypeAliasDef(it) => { self.type_alias_to_def(container.with_value(it))?.into() },
-                    ast::ImplDef(it) => { self.impl_to_def(container.with_value(it))?.into() },
+                    ast::FnDef(it) => self.fn_to_def(container.with_value(it))?.into(),
+                    ast::StructDef(it) => self.struct_to_def(container.with_value(it))?.into(),
+                    ast::EnumDef(it) => self.enum_to_def(container.with_value(it))?.into(),
+                    ast::TraitDef(it) => self.trait_to_def(container.with_value(it))?.into(),
+                    ast::TypeAliasDef(it) => self.type_alias_to_def(container.with_value(it))?.into(),
+                    ast::ImplDef(it) => self.impl_to_def(container.with_value(it))?.into(),
                     _ => continue,
                 }
             };
@@ -226,9 +226,9 @@ impl SourceToDefCtx<'_, '_> {
         for container in src.cloned().ancestors_with_macros(self.db.upcast()).skip(1) {
             let res: DefWithBodyId = match_ast! {
                 match (container.value) {
-                    ast::ConstDef(it) => { self.const_to_def(container.with_value(it))?.into() },
-                    ast::StaticDef(it) => { self.static_to_def(container.with_value(it))?.into() },
-                    ast::FnDef(it) => { self.fn_to_def(container.with_value(it))?.into() },
+                    ast::ConstDef(it) => self.const_to_def(container.with_value(it))?.into(),
+                    ast::StaticDef(it) => self.static_to_def(container.with_value(it))?.into(),
+                    ast::FnDef(it) => self.fn_to_def(container.with_value(it))?.into(),
                     _ => continue,
                 }
             };
diff --git a/crates/ra_hir_def/src/lib.rs b/crates/ra_hir_def/src/lib.rs
index bd32ac20a..2d27bbdf8 100644
--- a/crates/ra_hir_def/src/lib.rs
+++ b/crates/ra_hir_def/src/lib.rs
@@ -7,6 +7,11 @@
 //! Note that `hir_def` is a work in progress, so not all of the above is
 //! actually true.
 
+#[allow(unused)]
+macro_rules! eprintln {
+    ($($tt:tt)*) => { stdx::eprintln!($($tt)*) };
+}
+
 pub mod db;
 
 pub mod attr;
diff --git a/crates/ra_hir_expand/src/builtin_derive.rs b/crates/ra_hir_expand/src/builtin_derive.rs
index 79aea5806..bb45b0f1d 100644
--- a/crates/ra_hir_expand/src/builtin_derive.rs
+++ b/crates/ra_hir_expand/src/builtin_derive.rs
@@ -73,9 +73,9 @@ fn parse_adt(tt: &tt::Subtree) -> Result<BasicAdtInfo, mbe::ExpandError> {
     let node = item.syntax();
     let (name, params) = match_ast! {
         match node {
-            ast::StructDef(it) => { (it.name(), it.type_param_list()) },
-            ast::EnumDef(it) => { (it.name(), it.type_param_list()) },
-            ast::UnionDef(it) => { (it.name(), it.type_param_list()) },
+            ast::StructDef(it) => (it.name(), it.type_param_list()),
+            ast::EnumDef(it) => (it.name(), it.type_param_list()),
+            ast::UnionDef(it) => (it.name(), it.type_param_list()),
             _ => {
                 debug!("unexpected node is {:?}", node);
                 return Err(mbe::ExpandError::ConversionError)
diff --git a/crates/ra_hir_ty/Cargo.toml b/crates/ra_hir_ty/Cargo.toml
index 45be08430..9a4a7aa6f 100644
--- a/crates/ra_hir_ty/Cargo.toml
+++ b/crates/ra_hir_ty/Cargo.toml
@@ -9,6 +9,7 @@ doctest = false
 
 [dependencies]
 arrayvec = "0.5.1"
+smallvec = "1.2.0"
 ena = "0.13.1"
 log = "0.4.8"
 rustc-hash = "1.1.0"
diff --git a/crates/ra_hir_ty/src/_match.rs b/crates/ra_hir_ty/src/_match.rs
new file mode 100644
index 000000000..f29a25505
--- /dev/null
+++ b/crates/ra_hir_ty/src/_match.rs
@@ -0,0 +1,1411 @@
+//! This module implements match statement exhaustiveness checking and usefulness checking
+//! for match arms.
+//!
+//! It is modeled on the rustc module `librustc_mir_build::hair::pattern::_match`, which
+//! contains very detailed documentation about the algorithms used here. I've duplicated
+//! most of that documentation below.
+//!
+//! This file includes the logic for exhaustiveness and usefulness checking for
+//! pattern-matching. Specifically, given a list of patterns for a type, we can
+//! tell whether:
+//! (a) the patterns cover every possible constructor for the type [exhaustiveness]
+//! (b) each pattern is necessary [usefulness]
+//!
+//! The algorithm implemented here is a modified version of the one described in:
+//! http://moscova.inria.fr/~maranget/papers/warn/index.html
+//! However, to save future implementors from reading the original paper, we
+//! summarise the algorithm here to hopefully save time and be a little clearer
+//! (without being so rigorous).
+//!
+//! The core of the algorithm revolves about a "usefulness" check. In particular, we
+//! are trying to compute a predicate `U(P, p)` where `P` is a list of patterns (we refer to this as
+//! a matrix). `U(P, p)` represents whether, given an existing list of patterns
+//! `P_1 ..= P_m`, adding a new pattern `p` will be "useful" (that is, cover previously-
+//! uncovered values of the type).
+//!
+//! If we have this predicate, then we can easily compute both exhaustiveness of an
+//! entire set of patterns and the individual usefulness of each one.
+//! (a) the set of patterns is exhaustive iff `U(P, _)` is false (i.e., adding a wildcard
+//! match doesn't increase the number of values we're matching)
+//! (b) a pattern `P_i` is not useful if `U(P[0..=(i-1), P_i)` is false (i.e., adding a
+//! pattern to those that have come before it doesn't increase the number of values
+//! we're matching).
+//!
+//! During the course of the algorithm, the rows of the matrix won't just be individual patterns,
+//! but rather partially-deconstructed patterns in the form of a list of patterns. The paper
+//! calls those pattern-vectors, and we will call them pattern-stacks. The same holds for the
+//! new pattern `p`.
+//!
+//! For example, say we have the following:
+//! ```
+//!     // x: (Option<bool>, Result<()>)
+//!     match x {
+//!         (Some(true), _) => {}
+//!         (None, Err(())) => {}
+//!         (None, Err(_)) => {}
+//!     }
+//! ```
+//! Here, the matrix `P` starts as:
+//! [
+//!     [(Some(true), _)],
+//!     [(None, Err(()))],
+//!     [(None, Err(_))],
+//! ]
+//! We can tell it's not exhaustive, because `U(P, _)` is true (we're not covering
+//! `[(Some(false), _)]`, for instance). In addition, row 3 is not useful, because
+//! all the values it covers are already covered by row 2.
+//!
+//! A list of patterns can be thought of as a stack, because we are mainly interested in the top of
+//! the stack at any given point, and we can pop or apply constructors to get new pattern-stacks.
+//! To match the paper, the top of the stack is at the beginning / on the left.
+//!
+//! There are two important operations on pattern-stacks necessary to understand the algorithm:
+//!     1. We can pop a given constructor off the top of a stack. This operation is called
+//!        `specialize`, and is denoted `S(c, p)` where `c` is a constructor (like `Some` or
+//!        `None`) and `p` a pattern-stack.
+//!        If the pattern on top of the stack can cover `c`, this removes the constructor and
+//!        pushes its arguments onto the stack. It also expands OR-patterns into distinct patterns.
+//!        Otherwise the pattern-stack is discarded.
+//!        This essentially filters those pattern-stacks whose top covers the constructor `c` and
+//!        discards the others.
+//!
+//!        For example, the first pattern above initially gives a stack `[(Some(true), _)]`. If we
+//!        pop the tuple constructor, we are left with `[Some(true), _]`, and if we then pop the
+//!        `Some` constructor we get `[true, _]`. If we had popped `None` instead, we would get
+//!        nothing back.
+//!
+//!        This returns zero or more new pattern-stacks, as follows. We look at the pattern `p_1`
+//!        on top of the stack, and we have four cases:
+//!             1.1. `p_1 = c(r_1, .., r_a)`, i.e. the top of the stack has constructor `c`. We
+//!                  push onto the stack the arguments of this constructor, and return the result:
+//!                     r_1, .., r_a, p_2, .., p_n
+//!             1.2. `p_1 = c'(r_1, .., r_a')` where `c ≠ c'`. We discard the current stack and
+//!                  return nothing.
+//!             1.3. `p_1 = _`. We push onto the stack as many wildcards as the constructor `c` has
+//!                  arguments (its arity), and return the resulting stack:
+//!                     _, .., _, p_2, .., p_n
+//!             1.4. `p_1 = r_1 | r_2`. We expand the OR-pattern and then recurse on each resulting
+//!                  stack:
+//!                     S(c, (r_1, p_2, .., p_n))
+//!                     S(c, (r_2, p_2, .., p_n))
+//!
+//!     2. We can pop a wildcard off the top of the stack. This is called `D(p)`, where `p` is
+//!        a pattern-stack.
+//!        This is used when we know there are missing constructor cases, but there might be
+//!        existing wildcard patterns, so to check the usefulness of the matrix, we have to check
+//!        all its *other* components.
+//!
+//!        It is computed as follows. We look at the pattern `p_1` on top of the stack,
+//!        and we have three cases:
+//!             1.1. `p_1 = c(r_1, .., r_a)`. We discard the current stack and return nothing.
+//!             1.2. `p_1 = _`. We return the rest of the stack:
+//!                     p_2, .., p_n
+//!             1.3. `p_1 = r_1 | r_2`. We expand the OR-pattern and then recurse on each resulting
+//!               stack.
+//!                     D((r_1, p_2, .., p_n))
+//!                     D((r_2, p_2, .., p_n))
+//!
+//!     Note that the OR-patterns are not always used directly in Rust, but are used to derive the
+//!     exhaustive integer matching rules, so they're written here for posterity.
+//!
+//! Both those operations extend straightforwardly to a list or pattern-stacks, i.e. a matrix, by
+//! working row-by-row. Popping a constructor ends up keeping only the matrix rows that start with
+//! the given constructor, and popping a wildcard keeps those rows that start with a wildcard.
+//!
+//!
+//! The algorithm for computing `U`
+//! -------------------------------
+//! The algorithm is inductive (on the number of columns: i.e., components of tuple patterns).
+//! That means we're going to check the components from left-to-right, so the algorithm
+//! operates principally on the first component of the matrix and new pattern-stack `p`.
+//! This algorithm is realised in the `is_useful` function.
+//!
+//! Base case. (`n = 0`, i.e., an empty tuple pattern)
+//!     - If `P` already contains an empty pattern (i.e., if the number of patterns `m > 0`),
+//!       then `U(P, p)` is false.
+//!     - Otherwise, `P` must be empty, so `U(P, p)` is true.
+//!
+//! Inductive step. (`n > 0`, i.e., whether there's at least one column
+//!                  [which may then be expanded into further columns later])
+//!     We're going to match on the top of the new pattern-stack, `p_1`.
+//!         - If `p_1 == c(r_1, .., r_a)`, i.e. we have a constructor pattern.
+//!           Then, the usefulness of `p_1` can be reduced to whether it is useful when
+//!           we ignore all the patterns in the first column of `P` that involve other constructors.
+//!           This is where `S(c, P)` comes in:
+//!           `U(P, p) := U(S(c, P), S(c, p))`
+//!           This special case is handled in `is_useful_specialized`.
+//!
+//!           For example, if `P` is:
+//!           [
+//!               [Some(true), _],
+//!               [None, 0],
+//!           ]
+//!           and `p` is [Some(false), 0], then we don't care about row 2 since we know `p` only
+//!           matches values that row 2 doesn't. For row 1 however, we need to dig into the
+//!           arguments of `Some` to know whether some new value is covered. So we compute
+//!           `U([[true, _]], [false, 0])`.
+//!
+//!         - If `p_1 == _`, then we look at the list of constructors that appear in the first
+//!               component of the rows of `P`:
+//!             + If there are some constructors that aren't present, then we might think that the
+//!               wildcard `_` is useful, since it covers those constructors that weren't covered
+//!               before.
+//!               That's almost correct, but only works if there were no wildcards in those first
+//!               components. So we need to check that `p` is useful with respect to the rows that
+//!               start with a wildcard, if there are any. This is where `D` comes in:
+//!               `U(P, p) := U(D(P), D(p))`
+//!
+//!               For example, if `P` is:
+//!               [
+//!                   [_, true, _],
+//!                   [None, false, 1],
+//!               ]
+//!               and `p` is [_, false, _], the `Some` constructor doesn't appear in `P`. So if we
+//!               only had row 2, we'd know that `p` is useful. However row 1 starts with a
+//!               wildcard, so we need to check whether `U([[true, _]], [false, 1])`.
+//!
+//!             + Otherwise, all possible constructors (for the relevant type) are present. In this
+//!               case we must check whether the wildcard pattern covers any unmatched value. For
+//!               that, we can think of the `_` pattern as a big OR-pattern that covers all
+//!               possible constructors. For `Option`, that would mean `_ = None | Some(_)` for
+//!               example. The wildcard pattern is useful in this case if it is useful when
+//!               specialized to one of the possible constructors. So we compute:
+//!               `U(P, p) := ∃(k ϵ constructors) U(S(k, P), S(k, p))`
+//!
+//!               For example, if `P` is:
+//!               [
+//!                   [Some(true), _],
+//!                   [None, false],
+//!               ]
+//!               and `p` is [_, false], both `None` and `Some` constructors appear in the first
+//!               components of `P`. We will therefore try popping both constructors in turn: we
+//!               compute U([[true, _]], [_, false]) for the `Some` constructor, and U([[false]],
+//!               [false]) for the `None` constructor. The first case returns true, so we know that
+//!               `p` is useful for `P`. Indeed, it matches `[Some(false), _]` that wasn't matched
+//!               before.
+//!
+//!         - If `p_1 == r_1 | r_2`, then the usefulness depends on each `r_i` separately:
+//!           `U(P, p) := U(P, (r_1, p_2, .., p_n))
+//!                    || U(P, (r_2, p_2, .., p_n))`
+use std::sync::Arc;
+
+use smallvec::{smallvec, SmallVec};
+
+use crate::{
+    db::HirDatabase,
+    expr::{Body, Expr, Literal, Pat, PatId},
+    InferenceResult,
+};
+use hir_def::{adt::VariantData, EnumVariantId, VariantId};
+
+#[derive(Debug, Clone, Copy)]
+/// Either a pattern from the source code being analyzed, represented as
+/// as `PatId`, or a `Wild` pattern which is created as an intermediate
+/// step in the match checking algorithm and thus is not backed by a
+/// real `PatId`.
+///
+/// Note that it is totally valid for the `PatId` variant to contain
+/// a `PatId` which resolves to a `Wild` pattern, if that wild pattern
+/// exists in the source code being analyzed.
+enum PatIdOrWild {
+    PatId(PatId),
+    Wild,
+}
+
+impl PatIdOrWild {
+    fn as_pat(self, cx: &MatchCheckCtx) -> Pat {
+        match self {
+            PatIdOrWild::PatId(id) => cx.body.pats[id].clone(),
+            PatIdOrWild::Wild => Pat::Wild,
+        }
+    }
+
+    fn as_id(self) -> Option<PatId> {
+        match self {
+            PatIdOrWild::PatId(id) => Some(id),
+            PatIdOrWild::Wild => None,
+        }
+    }
+}
+
+impl From<PatId> for PatIdOrWild {
+    fn from(pat_id: PatId) -> Self {
+        Self::PatId(pat_id)
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct MatchCheckNotImplemented;
+
+/// The return type of `is_useful` is either an indication of usefulness
+/// of the match arm, or an error in the case the match statement
+/// is made up of types for which exhaustiveness checking is currently
+/// not completely implemented.
+///
+/// The `std::result::Result` type is used here rather than a custom enum
+/// to allow the use of `?`.
+pub type MatchCheckResult<T> = Result<T, MatchCheckNotImplemented>;
+
+#[derive(Debug)]
+/// A row in a Matrix.
+///
+/// This type is modeled from the struct of the same name in `rustc`.
+pub(crate) struct PatStack(PatStackInner);
+type PatStackInner = SmallVec<[PatIdOrWild; 2]>;
+
+impl PatStack {
+    pub(crate) fn from_pattern(pat_id: PatId) -> PatStack {
+        Self(smallvec!(pat_id.into()))
+    }
+
+    pub(crate) fn from_wild() -> PatStack {
+        Self(smallvec!(PatIdOrWild::Wild))
+    }
+
+    fn from_slice(slice: &[PatIdOrWild]) -> PatStack {
+        Self(SmallVec::from_slice(slice))
+    }
+
+    fn from_vec(v: PatStackInner) -> PatStack {
+        Self(v)
+    }
+
+    fn is_empty(&self) -> bool {
+        self.0.is_empty()
+    }
+
+    fn head(&self) -> PatIdOrWild {
+        self.0[0]
+    }
+
+    fn get_head(&self) -> Option<PatIdOrWild> {
+        self.0.first().copied()
+    }
+
+    fn to_tail(&self) -> PatStack {
+        Self::from_slice(&self.0[1..])
+    }
+
+    fn replace_head_with(&self, pat_ids: &[PatId]) -> PatStack {
+        let mut patterns: PatStackInner = smallvec![];
+        for pat in pat_ids {
+            patterns.push((*pat).into());
+        }
+        for pat in &self.0[1..] {
+            patterns.push(*pat);
+        }
+        PatStack::from_vec(patterns)
+    }
+
+    /// Computes `D(self)`.
+    ///
+    /// See the module docs and the associated documentation in rustc for details.
+    fn specialize_wildcard(&self, cx: &MatchCheckCtx) -> Option<PatStack> {
+        if matches!(self.head().as_pat(cx), Pat::Wild) {
+            Some(self.to_tail())
+        } else {
+            None
+        }
+    }
+
+    /// Computes `S(constructor, self)`.
+    ///
+    /// See the module docs and the associated documentation in rustc for details.
+    fn specialize_constructor(
+        &self,
+        cx: &MatchCheckCtx,
+        constructor: &Constructor,
+    ) -> MatchCheckResult<Option<PatStack>> {
+        let result = match (self.head().as_pat(cx), constructor) {
+            (Pat::Tuple(ref pat_ids), Constructor::Tuple { arity }) => {
+                debug_assert_eq!(
+                    pat_ids.len(),
+                    *arity,
+                    "we type check before calling this code, so we should never hit this case",
+                );
+
+                Some(self.replace_head_with(pat_ids))
+            }
+            (Pat::Lit(lit_expr), Constructor::Bool(constructor_val)) => {
+                match cx.body.exprs[lit_expr] {
+                    Expr::Literal(Literal::Bool(pat_val)) if *constructor_val == pat_val => {
+                        Some(self.to_tail())
+                    }
+                    // it was a bool but the value doesn't match
+                    Expr::Literal(Literal::Bool(_)) => None,
+                    // perhaps this is actually unreachable given we have
+                    // already checked that these match arms have the appropriate type?
+                    _ => return Err(MatchCheckNotImplemented),
+                }
+            }
+            (Pat::Wild, constructor) => Some(self.expand_wildcard(cx, constructor)?),
+            (Pat::Path(_), Constructor::Enum(constructor)) => {
+                // enums with no associated data become `Pat::Path`
+                let pat_id = self.head().as_id().expect("we know this isn't a wild");
+                if !enum_variant_matches(cx, pat_id, *constructor) {
+                    None
+                } else {
+                    Some(self.to_tail())
+                }
+            }
+            (Pat::TupleStruct { args: ref pat_ids, .. }, Constructor::Enum(constructor)) => {
+                let pat_id = self.head().as_id().expect("we know this isn't a wild");
+                if !enum_variant_matches(cx, pat_id, *constructor) {
+                    None
+                } else {
+                    Some(self.replace_head_with(pat_ids))
+                }
+            }
+            (Pat::Or(_), _) => return Err(MatchCheckNotImplemented),
+            (_, _) => return Err(MatchCheckNotImplemented),
+        };
+
+        Ok(result)
+    }
+
+    /// A special case of `specialize_constructor` where the head of the pattern stack
+    /// is a Wild pattern.
+    ///
+    /// Replaces the Wild pattern at the head of the pattern stack with N Wild patterns
+    /// (N >= 0), where N is the arity of the given constructor.
+    fn expand_wildcard(
+        &self,
+        cx: &MatchCheckCtx,
+        constructor: &Constructor,
+    ) -> MatchCheckResult<PatStack> {
+        assert_eq!(
+            Pat::Wild,
+            self.head().as_pat(cx),
+            "expand_wildcard must only be called on PatStack with wild at head",
+        );
+
+        let mut patterns: PatStackInner = smallvec![];
+
+        for _ in 0..constructor.arity(cx)? {
+            patterns.push(PatIdOrWild::Wild);
+        }
+
+        for pat in &self.0[1..] {
+            patterns.push(*pat);
+        }
+
+        Ok(PatStack::from_vec(patterns))
+    }
+}
+
+#[derive(Debug)]
+/// A collection of PatStack.
+///
+/// This type is modeled from the struct of the same name in `rustc`.
+pub(crate) struct Matrix(Vec<PatStack>);
+
+impl Matrix {
+    pub(crate) fn empty() -> Self {
+        Self(vec![])
+    }
+
+    pub(crate) fn push(&mut self, cx: &MatchCheckCtx, row: PatStack) {
+        if let Some(Pat::Or(pat_ids)) = row.get_head().map(|pat_id| pat_id.as_pat(cx)) {
+            // Or patterns are expanded here
+            for pat_id in pat_ids {
+                self.0.push(PatStack::from_pattern(pat_id));
+            }
+        } else {
+            self.0.push(row);
+        }
+    }
+
+    fn is_empty(&self) -> bool {
+        self.0.is_empty()
+    }
+
+    fn heads(&self) -> Vec<PatIdOrWild> {
+        self.0.iter().map(|p| p.head()).collect()
+    }
+
+    /// Computes `D(self)` for each contained PatStack.
+    ///
+    /// See the module docs and the associated documentation in rustc for details.
+    fn specialize_wildcard(&self, cx: &MatchCheckCtx) -> Self {
+        Self::collect(cx, self.0.iter().filter_map(|r| r.specialize_wildcard(cx)))
+    }
+
+    /// Computes `S(constructor, self)` for each contained PatStack.
+    ///
+    /// See the module docs and the associated documentation in rustc for details.
+    fn specialize_constructor(
+        &self,
+        cx: &MatchCheckCtx,
+        constructor: &Constructor,
+    ) -> MatchCheckResult<Self> {
+        let mut new_matrix = Matrix::empty();
+        for pat in &self.0 {
+            if let Some(pat) = pat.specialize_constructor(cx, constructor)? {
+                new_matrix.push(cx, pat);
+            }
+        }
+
+        Ok(new_matrix)
+    }
+
+    fn collect<T: IntoIterator<Item = PatStack>>(cx: &MatchCheckCtx, iter: T) -> Self {
+        let mut matrix = Matrix::empty();
+
+        for pat in iter {
+            // using push ensures we expand or-patterns
+            matrix.push(cx, pat);
+        }
+
+        matrix
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+/// An indication of the usefulness of a given match arm, where
+/// usefulness is defined as matching some patterns which were
+/// not matched by an prior match arms.
+///
+/// We may eventually need an `Unknown` variant here.
+pub enum Usefulness {
+    Useful,
+    NotUseful,
+}
+
+pub struct MatchCheckCtx<'a> {
+    pub body: Arc<Body>,
+    pub infer: Arc<InferenceResult>,
+    pub db: &'a dyn HirDatabase,
+}
+
+/// Given a set of patterns `matrix`, and pattern to consider `v`, determines
+/// whether `v` is useful. A pattern is useful if it covers cases which were
+/// not previously covered.
+///
+/// When calling this function externally (that is, not the recursive calls) it
+/// expected that you have already type checked the match arms. All patterns in
+/// matrix should be the same type as v, as well as they should all be the same
+/// type as the match expression.
+pub(crate) fn is_useful(
+    cx: &MatchCheckCtx,
+    matrix: &Matrix,
+    v: &PatStack,
+) -> MatchCheckResult<Usefulness> {
+    if v.is_empty() {
+        let result = if matrix.is_empty() { Usefulness::Useful } else { Usefulness::NotUseful };
+
+        return Ok(result);
+    }
+
+    if let Pat::Or(pat_ids) = v.head().as_pat(cx) {
+        let mut found_unimplemented = false;
+        let any_useful = pat_ids.iter().any(|&pat_id| {
+            let v = PatStack::from_pattern(pat_id);
+
+            match is_useful(cx, matrix, &v) {
+                Ok(Usefulness::Useful) => true,
+                Ok(Usefulness::NotUseful) => false,
+                _ => {
+                    found_unimplemented = true;
+                    false
+                }
+            }
+        });
+
+        return if any_useful {
+            Ok(Usefulness::Useful)
+        } else if found_unimplemented {
+            Err(MatchCheckNotImplemented)
+        } else {
+            Ok(Usefulness::NotUseful)
+        };
+    }
+
+    if let Some(constructor) = pat_constructor(cx, v.head())? {
+        let matrix = matrix.specialize_constructor(&cx, &constructor)?;
+        let v = v
+            .specialize_constructor(&cx, &constructor)?
+            .expect("we know this can't fail because we get the constructor from `v.head()` above");
+
+        is_useful(&cx, &matrix, &v)
+    } else {
+        // expanding wildcard
+        let mut used_constructors: Vec<Constructor> = vec![];
+        for pat in matrix.heads() {
+            if let Some(constructor) = pat_constructor(cx, pat)? {
+                used_constructors.push(constructor);
+            }
+        }
+
+        // We assume here that the first constructor is the "correct" type. Since we
+        // only care about the "type" of the constructor (i.e. if it is a bool we
+        // don't care about the value), this assumption should be valid as long as
+        // the match statement is well formed. We currently uphold this invariant by
+        // filtering match arms before calling `is_useful`, only passing in match arms
+        // whose type matches the type of the match expression.
+        match &used_constructors.first() {
+            Some(constructor) if all_constructors_covered(&cx, constructor, &used_constructors) => {
+                // If all constructors are covered, then we need to consider whether
+                // any values are covered by this wildcard.
+                //
+                // For example, with matrix '[[Some(true)], [None]]', all
+                // constructors are covered (`Some`/`None`), so we need
+                // to perform specialization to see that our wildcard will cover
+                // the `Some(false)` case.
+                //
+                // Here we create a constructor for each variant and then check
+                // usefulness after specializing for that constructor.
+                let mut found_unimplemented = false;
+                for constructor in constructor.all_constructors(cx) {
+                    let matrix = matrix.specialize_constructor(&cx, &constructor)?;
+                    let v = v.expand_wildcard(&cx, &constructor)?;
+
+                    match is_useful(&cx, &matrix, &v) {
+                        Ok(Usefulness::Useful) => return Ok(Usefulness::Useful),
+                        Ok(Usefulness::NotUseful) => continue,
+                        _ => found_unimplemented = true,
+                    };
+                }
+
+                if found_unimplemented {
+                    Err(MatchCheckNotImplemented)
+                } else {
+                    Ok(Usefulness::NotUseful)
+                }
+            }
+            _ => {
+                // Either not all constructors are covered, or the only other arms
+                // are wildcards. Either way, this pattern is useful if it is useful
+                // when compared to those arms with wildcards.
+                let matrix = matrix.specialize_wildcard(&cx);
+                let v = v.to_tail();
+
+                is_useful(&cx, &matrix, &v)
+            }
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+/// Similar to TypeCtor, but includes additional information about the specific
+/// value being instantiated. For example, TypeCtor::Bool doesn't contain the
+/// boolean value.
+enum Constructor {
+    Bool(bool),
+    Tuple { arity: usize },
+    Enum(EnumVariantId),
+}
+
+impl Constructor {
+    fn arity(&self, cx: &MatchCheckCtx) -> MatchCheckResult<usize> {
+        let arity = match self {
+            Constructor::Bool(_) => 0,
+            Constructor::Tuple { arity } => *arity,
+            Constructor::Enum(e) => {
+                match cx.db.enum_data(e.parent).variants[e.local_id].variant_data.as_ref() {
+                    VariantData::Tuple(struct_field_data) => struct_field_data.len(),
+                    VariantData::Unit => 0,
+                    _ => return Err(MatchCheckNotImplemented),
+                }
+            }
+        };
+
+        Ok(arity)
+    }
+
+    fn all_constructors(&self, cx: &MatchCheckCtx) -> Vec<Constructor> {
+        match self {
+            Constructor::Bool(_) => vec![Constructor::Bool(true), Constructor::Bool(false)],
+            Constructor::Tuple { .. } => vec![*self],
+            Constructor::Enum(e) => cx
+                .db
+                .enum_data(e.parent)
+                .variants
+                .iter()
+                .map(|(local_id, _)| {
+                    Constructor::Enum(EnumVariantId { parent: e.parent, local_id })
+                })
+                .collect(),
+        }
+    }
+}
+
+/// Returns the constructor for the given pattern. Should only return None
+/// in the case of a Wild pattern.
+fn pat_constructor(cx: &MatchCheckCtx, pat: PatIdOrWild) -> MatchCheckResult<Option<Constructor>> {
+    let res = match pat.as_pat(cx) {
+        Pat::Wild => None,
+        Pat::Tuple(pats) => Some(Constructor::Tuple { arity: pats.len() }),
+        Pat::Lit(lit_expr) => match cx.body.exprs[lit_expr] {
+            Expr::Literal(Literal::Bool(val)) => Some(Constructor::Bool(val)),
+            _ => return Err(MatchCheckNotImplemented),
+        },
+        Pat::TupleStruct { .. } | Pat::Path(_) => {
+            let pat_id = pat.as_id().expect("we already know this pattern is not a wild");
+            let variant_id =
+                cx.infer.variant_resolution_for_pat(pat_id).ok_or(MatchCheckNotImplemented)?;
+            match variant_id {
+                VariantId::EnumVariantId(enum_variant_id) => {
+                    Some(Constructor::Enum(enum_variant_id))
+                }
+                _ => return Err(MatchCheckNotImplemented),
+            }
+        }
+        _ => return Err(MatchCheckNotImplemented),
+    };
+
+    Ok(res)
+}
+
+fn all_constructors_covered(
+    cx: &MatchCheckCtx,
+    constructor: &Constructor,
+    used_constructors: &[Constructor],
+) -> bool {
+    match constructor {
+        Constructor::Tuple { arity } => {
+            used_constructors.iter().any(|constructor| match constructor {
+                Constructor::Tuple { arity: used_arity } => arity == used_arity,
+                _ => false,
+            })
+        }
+        Constructor::Bool(_) => {
+            if used_constructors.is_empty() {
+                return false;
+            }
+
+            let covers_true =
+                used_constructors.iter().any(|c| matches!(c, Constructor::Bool(true)));
+            let covers_false =
+                used_constructors.iter().any(|c| matches!(c, Constructor::Bool(false)));
+
+            covers_true && covers_false
+        }
+        Constructor::Enum(e) => cx.db.enum_data(e.parent).variants.iter().all(|(id, _)| {
+            for constructor in used_constructors {
+                if let Constructor::Enum(e) = constructor {
+                    if id == e.local_id {
+                        return true;
+                    }
+                }
+            }
+
+            false
+        }),
+    }
+}
+
+fn enum_variant_matches(cx: &MatchCheckCtx, pat_id: PatId, enum_variant_id: EnumVariantId) -> bool {
+    Some(enum_variant_id.into()) == cx.infer.variant_resolution_for_pat(pat_id)
+}
+
+#[cfg(test)]
+mod tests {
+    pub(super) use insta::assert_snapshot;
+    pub(super) use ra_db::fixture::WithFixture;
+
+    pub(super) use crate::test_db::TestDB;
+
+    pub(super) fn check_diagnostic_message(content: &str) -> String {
+        TestDB::with_single_file(content).0.diagnostics().0
+    }
+
+    pub(super) fn check_diagnostic(content: &str) {
+        let diagnostic_count = TestDB::with_single_file(content).0.diagnostics().1;
+
+        assert_eq!(1, diagnostic_count, "no diagnostic reported");
+    }
+
+    pub(super) fn check_no_diagnostic(content: &str) {
+        let diagnostic_count = TestDB::with_single_file(content).0.diagnostics().1;
+
+        assert_eq!(0, diagnostic_count, "expected no diagnostic, found one");
+    }
+
+    #[test]
+    fn empty_tuple_no_arms_diagnostic_message() {
+        let content = r"
+            fn test_fn() {
+                match () {
+                }
+            }
+        ";
+
+        assert_snapshot!(
+            check_diagnostic_message(content),
+            @"\"()\": Missing match arm\n"
+        );
+    }
+
+    #[test]
+    fn empty_tuple_no_arms() {
+        let content = r"
+            fn test_fn() {
+                match () {
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn empty_tuple_wild() {
+        let content = r"
+            fn test_fn() {
+                match () {
+                    _ => {}
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn empty_tuple_no_diagnostic() {
+        let content = r"
+            fn test_fn() {
+                match () {
+                    () => {}
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_empty_tuple_no_arms() {
+        let content = r"
+            fn test_fn() {
+                match (()) {
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_empty_tuple_no_diagnostic() {
+        let content = r"
+            fn test_fn() {
+                match (()) {
+                    (()) => {}
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_two_empty_tuple_no_arms() {
+        let content = r"
+            fn test_fn() {
+                match ((), ()) {
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_two_empty_tuple_no_diagnostic() {
+        let content = r"
+            fn test_fn() {
+                match ((), ()) {
+                    ((), ()) => {}
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn bool_no_arms() {
+        let content = r"
+            fn test_fn() {
+                match false {
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn bool_missing_arm() {
+        let content = r"
+            fn test_fn() {
+                match false {
+                    true => {}
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn bool_no_diagnostic() {
+        let content = r"
+            fn test_fn() {
+                match false {
+                    true => {}
+                    false => {}
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_bools_no_arms() {
+        let content = r"
+            fn test_fn() {
+                match (false, true) {
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_bools_missing_arms() {
+        let content = r"
+            fn test_fn() {
+                match (false, true) {
+                    (true, true) => {},
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_bools_missing_arm() {
+        let content = r"
+            fn test_fn() {
+                match (false, true) {
+                    (false, true) => {},
+                    (false, false) => {},
+                    (true, false) => {},
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_bools_with_wilds() {
+        let content = r"
+            fn test_fn() {
+                match (false, true) {
+                    (false, _) => {},
+                    (true, false) => {},
+                    (_, true) => {},
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_bools_no_diagnostic() {
+        let content = r"
+            fn test_fn() {
+                match (false, true) {
+                    (true, true) => {},
+                    (true, false) => {},
+                    (false, true) => {},
+                    (false, false) => {},
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_bools_binding_missing_arms() {
+        let content = r"
+            fn test_fn() {
+                match (false, true) {
+                    (true, _x) => {},
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_bools_binding_no_diagnostic() {
+        let content = r"
+            fn test_fn() {
+                match (false, true) {
+                    (true, _x) => {},
+                    (false, true) => {},
+                    (false, false) => {},
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_tuple_and_bools_no_arms() {
+        let content = r"
+            fn test_fn() {
+                match (false, ((), false)) {
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_tuple_and_bools_missing_arms() {
+        let content = r"
+            fn test_fn() {
+                match (false, ((), false)) {
+                    (true, ((), true)) => {},
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_tuple_and_bools_no_diagnostic() {
+        let content = r"
+            fn test_fn() {
+                match (false, ((), false)) {
+                    (true, ((), true)) => {},
+                    (true, ((), false)) => {},
+                    (false, ((), true)) => {},
+                    (false, ((), false)) => {},
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_tuple_and_bools_wildcard_missing_arms() {
+        let content = r"
+            fn test_fn() {
+                match (false, ((), false)) {
+                    (true, _) => {},
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_tuple_and_bools_wildcard_no_diagnostic() {
+        let content = r"
+            fn test_fn() {
+                match (false, ((), false)) {
+                    (true, ((), true)) => {},
+                    (true, ((), false)) => {},
+                    (false, _) => {},
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_no_arms() {
+        let content = r"
+            enum Either {
+                A,
+                B,
+            }
+            fn test_fn() {
+                match Either::A {
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_missing_arms() {
+        let content = r"
+            enum Either {
+                A,
+                B,
+            }
+            fn test_fn() {
+                match Either::B {
+                    Either::A => {},
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_no_diagnostic() {
+        let content = r"
+            enum Either {
+                A,
+                B,
+            }
+            fn test_fn() {
+                match Either::B {
+                    Either::A => {},
+                    Either::B => {},
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_ref_missing_arms() {
+        let content = r"
+            enum Either {
+                A,
+                B,
+            }
+            fn test_fn() {
+                match &Either::B {
+                    Either::A => {},
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_ref_no_diagnostic() {
+        let content = r"
+            enum Either {
+                A,
+                B,
+            }
+            fn test_fn() {
+                match &Either::B {
+                    Either::A => {},
+                    Either::B => {},
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_containing_bool_no_arms() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B,
+            }
+            fn test_fn() {
+                match Either::B {
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_containing_bool_missing_arms() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B,
+            }
+            fn test_fn() {
+                match Either::B {
+                    Either::A(true) => (),
+                    Either::B => (),
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_containing_bool_no_diagnostic() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B,
+            }
+            fn test_fn() {
+                match Either::B {
+                    Either::A(true) => (),
+                    Either::A(false) => (),
+                    Either::B => (),
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_containing_bool_with_wild_no_diagnostic() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B,
+            }
+            fn test_fn() {
+                match Either::B {
+                    Either::B => (),
+                    _ => (),
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_containing_bool_with_wild_2_no_diagnostic() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B,
+            }
+            fn test_fn() {
+                match Either::B {
+                    Either::A(_) => (),
+                    Either::B => (),
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_different_sizes_missing_arms() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B(bool, bool),
+            }
+            fn test_fn() {
+                match Either::A(false) {
+                    Either::A(_) => (),
+                    Either::B(false, _) => (),
+                }
+            }
+        ";
+
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_different_sizes_no_diagnostic() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B(bool, bool),
+            }
+            fn test_fn() {
+                match Either::A(false) {
+                    Either::A(_) => (),
+                    Either::B(true, _) => (),
+                    Either::B(false, _) => (),
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn or_no_diagnostic() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B(bool, bool),
+            }
+            fn test_fn() {
+                match Either::A(false) {
+                    Either::A(true) | Either::A(false) => (),
+                    Either::B(true, _) => (),
+                    Either::B(false, _) => (),
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn tuple_of_enum_no_diagnostic() {
+        let content = r"
+            enum Either {
+                A(bool),
+                B(bool, bool),
+            }
+            enum Either2 {
+                C,
+                D,
+            }
+            fn test_fn() {
+                match (Either::A(false), Either2::C) {
+                    (Either::A(true), _) | (Either::A(false), _) => (),
+                    (Either::B(true, _), Either2::C) => (),
+                    (Either::B(false, _), Either2::C) => (),
+                    (Either::B(_, _), Either2::D) => (),
+                }
+            }
+        ";
+
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn mismatched_types() {
+        let content = r"
+            enum Either {
+                A,
+                B,
+            }
+            enum Either2 {
+                C,
+                D,
+            }
+            fn test_fn() {
+                match Either::A {
+                    Either2::C => (),
+                    Either2::D => (),
+                }
+            }
+        ";
+
+        // Match arms with the incorrect type are filtered out.
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn mismatched_types_with_different_arity() {
+        let content = r"
+            fn test_fn() {
+                match (true, false) {
+                    (true, false, true) => (),
+                    (true) => (),
+                }
+            }
+        ";
+
+        // Match arms with the incorrect type are filtered out.
+        check_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_not_in_scope() {
+        let content = r"
+            fn test_fn() {
+                match Foo::Bar {
+                    Foo::Baz => (),
+                }
+            }
+        ";
+
+        // The enum is not in scope so we don't perform exhaustiveness
+        // checking, but we want to be sure we don't panic here (and
+        // we don't create a diagnostic).
+        check_no_diagnostic(content);
+    }
+}
+
+#[cfg(test)]
+mod false_negatives {
+    //! The implementation of match checking here is a work in progress. As we roll this out, we
+    //! prefer false negatives to false positives (ideally there would be no false positives). This
+    //! test module should document known false negatives. Eventually we will have a complete
+    //! implementation of match checking and this module will be empty.
+    //!
+    //! The reasons for documenting known false negatives:
+    //!
+    //!   1. It acts as a backlog of work that can be done to improve the behavior of the system.
+    //!   2. It ensures the code doesn't panic when handling these cases.
+
+    use super::tests::*;
+
+    #[test]
+    fn integers() {
+        let content = r"
+            fn test_fn() {
+                match 5 {
+                    10 => (),
+                    11..20 => (),
+                }
+            }
+        ";
+
+        // This is a false negative.
+        // We don't currently check integer exhaustiveness.
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn enum_record() {
+        let content = r"
+            enum Either {
+                A { foo: u32 },
+                B,
+            }
+            fn test_fn() {
+                match Either::B {
+                    Either::A { foo: 5 } => (),
+                }
+            }
+        ";
+
+        // This is a false negative.
+        // We don't currently handle enum record types.
+        check_no_diagnostic(content);
+    }
+
+    #[test]
+    fn internal_or() {
+        let content = r"
+            fn test_fn() {
+                enum Either {
+                    A(bool),
+                    B,
+                }
+                match Either::B {
+                    Either::A(true | false) => (),
+                }
+            }
+        ";
+
+        // This is a false negative.
+        // We do not currently handle patterns with internal `or`s.
+        check_no_diagnostic(content);
+    }
+}
diff --git a/crates/ra_hir_ty/src/diagnostics.rs b/crates/ra_hir_ty/src/diagnostics.rs
index 0f8522021..8cbce1168 100644
--- a/crates/ra_hir_ty/src/diagnostics.rs
+++ b/crates/ra_hir_ty/src/diagnostics.rs
@@ -6,7 +6,7 @@ use hir_expand::{db::AstDatabase, name::Name, HirFileId, InFile};
 use ra_syntax::{ast, AstNode, AstPtr, SyntaxNodePtr};
 use stdx::format_to;
 
-pub use hir_def::diagnostics::UnresolvedModule;
+pub use hir_def::{diagnostics::UnresolvedModule, expr::MatchArm};
 pub use hir_expand::diagnostics::{AstDiagnostic, Diagnostic, DiagnosticSink};
 
 #[derive(Debug)]
@@ -63,6 +63,25 @@ impl AstDiagnostic for MissingFields {
 }
 
 #[derive(Debug)]
+pub struct MissingMatchArms {
+    pub file: HirFileId,
+    pub match_expr: AstPtr<ast::Expr>,
+    pub arms: AstPtr<ast::MatchArmList>,
+}
+
+impl Diagnostic for MissingMatchArms {
+    fn message(&self) -> String {
+        String::from("Missing match arm")
+    }
+    fn source(&self) -> InFile<SyntaxNodePtr> {
+        InFile { file_id: self.file, value: self.match_expr.into() }
+    }
+    fn as_any(&self) -> &(dyn Any + Send + 'static) {
+        self
+    }
+}
+
+#[derive(Debug)]
 pub struct MissingOkInTailExpr {
     pub file: HirFileId,
     pub expr: AstPtr<ast::Expr>,
diff --git a/crates/ra_hir_ty/src/expr.rs b/crates/ra_hir_ty/src/expr.rs
index eb1209d08..6547eedae 100644
--- a/crates/ra_hir_ty/src/expr.rs
+++ b/crates/ra_hir_ty/src/expr.rs
@@ -13,9 +13,10 @@ use rustc_hash::FxHashSet;
 
 use crate::{
     db::HirDatabase,
-    diagnostics::{MissingFields, MissingOkInTailExpr},
+    diagnostics::{MissingFields, MissingMatchArms, MissingOkInTailExpr},
     utils::variant_data,
     ApplicationTy, InferenceResult, Ty, TypeCtor,
+    _match::{is_useful, MatchCheckCtx, Matrix, PatStack, Usefulness},
 };
 
 pub use hir_def::{
@@ -51,15 +52,99 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
         for e in body.exprs.iter() {
             if let (id, Expr::RecordLit { path, fields, spread }) = e {
                 self.validate_record_literal(id, path, fields, *spread, db);
+            } else if let (id, Expr::Match { expr, arms }) = e {
+                self.validate_match(id, *expr, arms, db, self.infer.clone());
             }
         }
 
         let body_expr = &body[body.body_expr];
-        if let Expr::Block { statements: _, tail: Some(t) } = body_expr {
+        if let Expr::Block { tail: Some(t), .. } = body_expr {
             self.validate_results_in_tail_expr(body.body_expr, *t, db);
         }
     }
 
+    fn validate_match(
+        &mut self,
+        id: ExprId,
+        match_expr: ExprId,
+        arms: &[MatchArm],
+        db: &dyn HirDatabase,
+        infer: Arc<InferenceResult>,
+    ) {
+        let (body, source_map): (Arc<Body>, Arc<BodySourceMap>) =
+            db.body_with_source_map(self.func.into());
+
+        let match_expr_ty = match infer.type_of_expr.get(match_expr) {
+            Some(ty) => ty,
+            // If we can't resolve the type of the match expression
+            // we cannot perform exhaustiveness checks.
+            None => return,
+        };
+
+        let cx = MatchCheckCtx { body, infer: infer.clone(), db };
+        let pats = arms.iter().map(|arm| arm.pat);
+
+        let mut seen = Matrix::empty();
+        for pat in pats {
+            // We skip any patterns whose type we cannot resolve.
+            //
+            // This could lead to false positives in this diagnostic, so
+            // it might be better to skip the entire diagnostic if we either
+            // cannot resolve a match arm or determine that the match arm has
+            // the wrong type.
+            if let Some(pat_ty) = infer.type_of_pat.get(pat) {
+                // We only include patterns whose type matches the type
+                // of the match expression. If we had a InvalidMatchArmPattern
+                // diagnostic or similar we could raise that in an else
+                // block here.
+                //
+                // When comparing the types, we also have to consider that rustc
+                // will automatically de-reference the match expression type if
+                // necessary.
+                //
+                // FIXME we should use the type checker for this.
+                if pat_ty == match_expr_ty
+                    || match_expr_ty
+                        .as_reference()
+                        .map(|(match_expr_ty, _)| match_expr_ty == pat_ty)
+                        .unwrap_or(false)
+                {
+                    // If we had a NotUsefulMatchArm diagnostic, we could
+                    // check the usefulness of each pattern as we added it
+                    // to the matrix here.
+                    let v = PatStack::from_pattern(pat);
+                    seen.push(&cx, v);
+                }
+            }
+        }
+
+        match is_useful(&cx, &seen, &PatStack::from_wild()) {
+            Ok(Usefulness::Useful) => (),
+            // if a wildcard pattern is not useful, then all patterns are covered
+            Ok(Usefulness::NotUseful) => return,
+            // this path is for unimplemented checks, so we err on the side of not
+            // reporting any errors
+            _ => return,
+        }
+
+        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::MatchExpr(match_expr) = expr.to_node(&root) {
+                    if let (Some(match_expr), Some(arms)) =
+                        (match_expr.expr(), match_expr.match_arm_list())
+                    {
+                        self.sink.push(MissingMatchArms {
+                            file: source_ptr.file_id,
+                            match_expr: AstPtr::new(&match_expr),
+                            arms: AstPtr::new(&arms),
+                        })
+                    }
+                }
+            }
+        }
+    }
+
     fn validate_record_literal(
         &mut self,
         id: ExprId,
diff --git a/crates/ra_hir_ty/src/infer/pat.rs b/crates/ra_hir_ty/src/infer/pat.rs
index 86acd27f8..69bbb4307 100644
--- a/crates/ra_hir_ty/src/infer/pat.rs
+++ b/crates/ra_hir_ty/src/infer/pat.rs
@@ -21,9 +21,13 @@ impl<'a> InferenceContext<'a> {
         subpats: &[PatId],
         expected: &Ty,
         default_bm: BindingMode,
+        id: PatId,
     ) -> Ty {
         let (ty, def) = self.resolve_variant(path);
         let var_data = def.map(|it| variant_data(self.db.upcast(), it));
+        if let Some(variant) = def {
+            self.write_variant_resolution(id.into(), variant);
+        }
         self.unify(&ty, expected);
 
         let substs = ty.substs().unwrap_or_else(Substs::empty);
@@ -152,7 +156,7 @@ impl<'a> InferenceContext<'a> {
                 Ty::apply_one(TypeCtor::Ref(*mutability), subty)
             }
             Pat::TupleStruct { path: p, args: subpats } => {
-                self.infer_tuple_struct_pat(p.as_ref(), subpats, expected, default_bm)
+                self.infer_tuple_struct_pat(p.as_ref(), subpats, expected, default_bm, pat)
             }
             Pat::Record { path: p, args: fields } => {
                 self.infer_record_pat(p.as_ref(), fields, expected, default_bm, pat)
diff --git a/crates/ra_hir_ty/src/infer/path.rs b/crates/ra_hir_ty/src/infer/path.rs
index 318652c61..2b6bc0f79 100644
--- a/crates/ra_hir_ty/src/infer/path.rs
+++ b/crates/ra_hir_ty/src/infer/path.rs
@@ -67,8 +67,16 @@ impl<'a> InferenceContext<'a> {
             ValueNs::FunctionId(it) => it.into(),
             ValueNs::ConstId(it) => it.into(),
             ValueNs::StaticId(it) => it.into(),
-            ValueNs::StructId(it) => it.into(),
-            ValueNs::EnumVariantId(it) => it.into(),
+            ValueNs::StructId(it) => {
+                self.write_variant_resolution(id, it.into());
+
+                it.into()
+            }
+            ValueNs::EnumVariantId(it) => {
+                self.write_variant_resolution(id, it.into());
+
+                it.into()
+            }
         };
 
         let ty = self.db.value_ty(typable);
diff --git a/crates/ra_hir_ty/src/lib.rs b/crates/ra_hir_ty/src/lib.rs
index a9022dee7..18f74d3b1 100644
--- a/crates/ra_hir_ty/src/lib.rs
+++ b/crates/ra_hir_ty/src/lib.rs
@@ -1,6 +1,11 @@
 //! The type system. We currently use this to infer types for completion, hover
 //! information and various assists.
 
+#[allow(unused)]
+macro_rules! eprintln {
+    ($($tt:tt)*) => { stdx::eprintln!($($tt)*) };
+}
+
 macro_rules! impl_froms {
     ($e:ident: $($v:ident $(($($sv:ident),*))?),*) => {
         $(
@@ -38,6 +43,7 @@ mod tests;
 #[cfg(test)]
 mod test_db;
 mod marks;
+mod _match;
 
 use std::ops::Deref;
 use std::sync::Arc;
@@ -855,7 +861,8 @@ pub trait TypeWalk {
         );
         self
     }
-    // /// Shifts up debruijn indices of `Ty::Bound` vars by `n`.
+
+    /// Shifts up debruijn indices of `Ty::Bound` vars by `n`.
     fn shift_bound_vars(self, n: DebruijnIndex) -> Self
     where
         Self: Sized,
diff --git a/crates/ra_hir_ty/src/test_db.rs b/crates/ra_hir_ty/src/test_db.rs
index 208096aab..3a4d58bf9 100644
--- a/crates/ra_hir_ty/src/test_db.rs
+++ b/crates/ra_hir_ty/src/test_db.rs
@@ -105,8 +105,9 @@ impl TestDB {
     }
 
     // FIXME: don't duplicate this
-    pub fn diagnostics(&self) -> String {
+    pub fn diagnostics(&self) -> (String, u32) {
         let mut buf = String::new();
+        let mut count = 0;
         let crate_graph = self.crate_graph();
         for krate in crate_graph.iter() {
             let crate_def_map = self.crate_def_map(krate);
@@ -133,13 +134,14 @@ impl TestDB {
                 let infer = self.infer(f.into());
                 let mut sink = DiagnosticSink::new(|d| {
                     format_to!(buf, "{:?}: {}\n", d.syntax_node(self).text(), d.message());
+                    count += 1;
                 });
                 infer.add_diagnostics(self, f, &mut sink);
                 let mut validator = ExprValidator::new(f, infer, &mut sink);
                 validator.validate_body(self);
             }
         }
-        buf
+        (buf, count)
     }
 }
 
diff --git a/crates/ra_hir_ty/src/tests.rs b/crates/ra_hir_ty/src/tests.rs
index c3d793cc2..e6ac0aec3 100644
--- a/crates/ra_hir_ty/src/tests.rs
+++ b/crates/ra_hir_ty/src/tests.rs
@@ -309,7 +309,8 @@ fn no_such_field_diagnostics() {
         }
         ",
     )
-    .diagnostics();
+    .diagnostics()
+    .0;
 
     assert_snapshot!(diagnostics, @r###"
     "baz: 62": no such field
diff --git a/crates/ra_hir_ty/src/tests/traits.rs b/crates/ra_hir_ty/src/tests/traits.rs
index 081aa943a..22ae6ca90 100644
--- a/crates/ra_hir_ty/src/tests/traits.rs
+++ b/crates/ra_hir_ty/src/tests/traits.rs
@@ -2021,3 +2021,28 @@ fn main() {
     "###
     );
 }
+
+#[test]
+fn dyn_trait_through_chalk() {
+    let t = type_at(
+        r#"
+//- /main.rs
+struct Box<T> {}
+#[lang = "deref"]
+trait Deref {
+    type Target;
+}
+impl<T> Deref for Box<T> {
+    type Target = T;
+}
+trait Trait {
+    fn foo(&self);
+}
+
+fn test(x: Box<dyn Trait>) {
+    x.foo()<|>;
+}
+"#,
+    );
+    assert_eq!(t, "()");
+}
diff --git a/crates/ra_hir_ty/src/traits/chalk.rs b/crates/ra_hir_ty/src/traits/chalk.rs
index 53ce362ea..1bc0f0713 100644
--- a/crates/ra_hir_ty/src/traits/chalk.rs
+++ b/crates/ra_hir_ty/src/traits/chalk.rs
@@ -427,7 +427,12 @@ impl ToChalk for GenericPredicate {
         db: &dyn HirDatabase,
         where_clause: chalk_ir::QuantifiedWhereClause<Interner>,
     ) -> GenericPredicate {
-        match where_clause.value {
+        // we don't produce any where clauses with binders and can't currently deal with them
+        match where_clause
+            .value
+            .shifted_out(&Interner)
+            .expect("unexpected bound vars in where clause")
+        {
             chalk_ir::WhereClause::Implemented(tr) => {
                 GenericPredicate::Implemented(from_chalk(db, tr))
             }
diff --git a/crates/ra_ide/src/call_info.rs b/crates/ra_ide/src/call_info.rs
index 39d09a07f..ca57eceff 100644
--- a/crates/ra_ide/src/call_info.rs
+++ b/crates/ra_ide/src/call_info.rs
@@ -109,7 +109,7 @@ impl FnCallNode {
         syntax.ancestors().find_map(|node| {
             match_ast! {
                 match node {
-                    ast::CallExpr(it) => { Some(FnCallNode::CallExpr(it)) },
+                    ast::CallExpr(it) => Some(FnCallNode::CallExpr(it)),
                     ast::MethodCallExpr(it) => {
                         let arg_list = it.arg_list()?;
                         if !syntax.text_range().is_subrange(&arg_list.syntax().text_range()) {
@@ -117,8 +117,8 @@ impl FnCallNode {
                         }
                         Some(FnCallNode::MethodCallExpr(it))
                     },
-                    ast::MacroCall(it) => { Some(FnCallNode::MacroCallExpr(it)) },
-                    _ => { None },
+                    ast::MacroCall(it) => Some(FnCallNode::MacroCallExpr(it)),
+                    _ => None,
                 }
             }
         })
@@ -127,10 +127,10 @@ impl FnCallNode {
     pub(crate) fn with_node_exact(node: &SyntaxNode) -> Option<FnCallNode> {
         match_ast! {
             match node {
-                ast::CallExpr(it) => { Some(FnCallNode::CallExpr(it)) },
-                ast::MethodCallExpr(it) => { Some(FnCallNode::MethodCallExpr(it)) },
-                ast::MacroCall(it) => { Some(FnCallNode::MacroCallExpr(it)) },
-                _ => { None },
+                ast::CallExpr(it) => Some(FnCallNode::CallExpr(it)),
+                ast::MethodCallExpr(it) => Some(FnCallNode::MethodCallExpr(it)),
+                ast::MacroCall(it) => Some(FnCallNode::MacroCallExpr(it)),
+                _ => None,
             }
         }
     }
diff --git a/crates/ra_ide/src/completion.rs b/crates/ra_ide/src/completion.rs
index 93157bbba..4a1a2a04a 100644
--- a/crates/ra_ide/src/completion.rs
+++ b/crates/ra_ide/src/completion.rs
@@ -10,8 +10,8 @@ mod complete_pattern;
 mod complete_fn_param;
 mod complete_keyword;
 mod complete_snippet;
-mod complete_path;
-mod complete_scope;
+mod complete_qualified_path;
+mod complete_unqualified_path;
 mod complete_postfix;
 mod complete_macro_in_item_position;
 mod complete_trait_impl;
@@ -85,8 +85,8 @@ pub(crate) fn completions(
     complete_keyword::complete_use_tree_keyword(&mut acc, &ctx);
     complete_snippet::complete_expr_snippet(&mut acc, &ctx);
     complete_snippet::complete_item_snippet(&mut acc, &ctx);
-    complete_path::complete_path(&mut acc, &ctx);
-    complete_scope::complete_scope(&mut acc, &ctx);
+    complete_qualified_path::complete_qualified_path(&mut acc, &ctx);
+    complete_unqualified_path::complete_unqualified_path(&mut acc, &ctx);
     complete_dot::complete_dot(&mut acc, &ctx);
     complete_record::complete_record(&mut acc, &ctx);
     complete_pattern::complete_pattern(&mut acc, &ctx);
diff --git a/crates/ra_ide/src/completion/complete_fn_param.rs b/crates/ra_ide/src/completion/complete_fn_param.rs
index 9226ac055..62ae5ccb4 100644
--- a/crates/ra_ide/src/completion/complete_fn_param.rs
+++ b/crates/ra_ide/src/completion/complete_fn_param.rs
@@ -18,8 +18,8 @@ pub(super) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
     for node in ctx.token.parent().ancestors() {
         match_ast! {
             match node {
-                ast::SourceFile(it) => { process(it, &mut params) },
-                ast::ItemList(it) => { process(it, &mut params) },
+                ast::SourceFile(it) => process(it, &mut params),
+                ast::ItemList(it) => process(it, &mut params),
                 _ => (),
             }
         }
diff --git a/crates/ra_ide/src/completion/complete_keyword.rs b/crates/ra_ide/src/completion/complete_keyword.rs
index 1e053ea4a..38f9c34e7 100644
--- a/crates/ra_ide/src/completion/complete_keyword.rs
+++ b/crates/ra_ide/src/completion/complete_keyword.rs
@@ -86,9 +86,9 @@ fn is_in_loop_body(leaf: &SyntaxToken) -> bool {
         }
         let loop_body = match_ast! {
             match node {
-                ast::ForExpr(it) => { it.loop_body() },
-                ast::WhileExpr(it) => { it.loop_body() },
-                ast::LoopExpr(it) => { it.loop_body() },
+                ast::ForExpr(it) => it.loop_body(),
+                ast::WhileExpr(it) => it.loop_body(),
+                ast::LoopExpr(it) => it.loop_body(),
                 _ => None,
             }
         };
diff --git a/crates/ra_ide/src/completion/complete_path.rs b/crates/ra_ide/src/completion/complete_qualified_path.rs
index 3ed2ae2b6..d98523406 100644
--- a/crates/ra_ide/src/completion/complete_path.rs
+++ b/crates/ra_ide/src/completion/complete_qualified_path.rs
@@ -6,7 +6,7 @@ use test_utils::tested_by;
 
 use crate::completion::{CompletionContext, Completions};
 
-pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
+pub(super) fn complete_qualified_path(acc: &mut Completions, ctx: &CompletionContext) {
     let path = match &ctx.path_prefix {
         Some(path) => path.clone(),
         _ => return,
diff --git a/crates/ra_ide/src/completion/complete_record.rs b/crates/ra_ide/src/completion/complete_record.rs
index 01dd8c6db..79f5c8c8f 100644
--- a/crates/ra_ide/src/completion/complete_record.rs
+++ b/crates/ra_ide/src/completion/complete_record.rs
@@ -1,12 +1,13 @@
 //! Complete fields in record literals and patterns.
-use crate::completion::{CompletionContext, Completions};
 use ra_syntax::{ast, ast::NameOwner, SmolStr};
 
+use crate::completion::{CompletionContext, Completions};
+
 pub(super) fn complete_record(acc: &mut Completions, ctx: &CompletionContext) -> Option<()> {
     let (ty, variant, already_present_fields) =
         match (ctx.record_lit_pat.as_ref(), ctx.record_lit_syntax.as_ref()) {
             (None, None) => return None,
-            (Some(_), Some(_)) => panic!("A record cannot be both a literal and a pattern"),
+            (Some(_), Some(_)) => unreachable!("A record cannot be both a literal and a pattern"),
             (Some(record_pat), _) => (
                 ctx.sema.type_of_pat(&record_pat.clone().into())?,
                 ctx.sema.resolve_record_pattern(record_pat)?,
@@ -59,9 +60,10 @@ fn pattern_ascribed_fields(record_pat: &ast::RecordPat) -> Vec<SmolStr> {
 #[cfg(test)]
 mod tests {
     mod record_lit_tests {
-        use crate::completion::{test_utils::do_completion, CompletionItem, CompletionKind};
         use insta::assert_debug_snapshot;
 
+        use crate::completion::{test_utils::do_completion, CompletionItem, CompletionKind};
+
         fn complete(code: &str) -> Vec<CompletionItem> {
             do_completion(code, CompletionKind::Reference)
         }
@@ -204,9 +206,10 @@ mod tests {
     }
 
     mod record_pat_tests {
-        use crate::completion::{test_utils::do_completion, CompletionItem, CompletionKind};
         use insta::assert_debug_snapshot;
 
+        use crate::completion::{test_utils::do_completion, CompletionItem, CompletionKind};
+
         fn complete(code: &str) -> Vec<CompletionItem> {
             do_completion(code, CompletionKind::Reference)
         }
diff --git a/crates/ra_ide/src/completion/complete_scope.rs b/crates/ra_ide/src/completion/complete_unqualified_path.rs
index 665597e4c..efde9bf73 100644
--- a/crates/ra_ide/src/completion/complete_scope.rs
+++ b/crates/ra_ide/src/completion/complete_unqualified_path.rs
@@ -2,7 +2,7 @@
 
 use crate::completion::{CompletionContext, Completions};
 
-pub(super) fn complete_scope(acc: &mut Completions, ctx: &CompletionContext) {
+pub(super) fn complete_unqualified_path(acc: &mut Completions, ctx: &CompletionContext) {
     if !(ctx.is_trivial_path && !ctx.is_pat_binding_or_const) {
         return;
     }
diff --git a/crates/ra_ide/src/completion/completion_context.rs b/crates/ra_ide/src/completion/completion_context.rs
index b8213d62f..f833d2a9a 100644
--- a/crates/ra_ide/src/completion/completion_context.rs
+++ b/crates/ra_ide/src/completion/completion_context.rs
@@ -50,6 +50,8 @@ pub(crate) struct CompletionContext<'a> {
     pub(super) dot_receiver_is_ambiguous_float_literal: bool,
     /// If this is a call (method or function) in particular, i.e. the () are already there.
     pub(super) is_call: bool,
+    /// If this is a macro call, i.e. the () are already there.
+    pub(super) is_macro_call: bool,
     pub(super) is_path_type: bool,
     pub(super) has_type_args: bool,
 }
@@ -102,6 +104,7 @@ impl<'a> CompletionContext<'a> {
             is_new_item: false,
             dot_receiver: None,
             is_call: false,
+            is_macro_call: false,
             is_path_type: false,
             has_type_args: false,
             dot_receiver_is_ambiguous_float_literal: false,
@@ -269,6 +272,7 @@ impl<'a> CompletionContext<'a> {
                 .and_then(ast::PathExpr::cast)
                 .and_then(|it| it.syntax().parent().and_then(ast::CallExpr::cast))
                 .is_some();
+            self.is_macro_call = path.syntax().parent().and_then(ast::MacroCall::cast).is_some();
 
             self.is_path_type = path.syntax().parent().and_then(ast::PathType::cast).is_some();
             self.has_type_args = segment.type_arg_list().is_some();
diff --git a/crates/ra_ide/src/completion/presentation.rs b/crates/ra_ide/src/completion/presentation.rs
index cdfd7bc32..55f75b15a 100644
--- a/crates/ra_ide/src/completion/presentation.rs
+++ b/crates/ra_ide/src/completion/presentation.rs
@@ -174,7 +174,8 @@ impl Completions {
                 .set_deprecated(is_deprecated(macro_, ctx.db))
                 .detail(detail);
 
-        builder = if ctx.use_item_syntax.is_some() {
+        builder = if ctx.use_item_syntax.is_some() || ctx.is_macro_call {
+            tested_by!(dont_insert_macro_call_parens_unncessary);
             builder.insert_text(name)
         } else {
             let macro_braces_to_insert =
@@ -960,7 +961,8 @@ mod tests {
     }
 
     #[test]
-    fn dont_insert_macro_call_braces_in_use() {
+    fn dont_insert_macro_call_parens_unncessary() {
+        covers!(dont_insert_macro_call_parens_unncessary);
         assert_debug_snapshot!(
             do_reference_completion(
                 r"
@@ -986,6 +988,41 @@ mod tests {
             },
         ]
         "###
-        )
+        );
+
+        assert_debug_snapshot!(
+            do_reference_completion(
+                r"
+                //- /main.rs
+                macro_rules frobnicate {
+                    () => ()
+                }
+                fn main() {
+                    frob<|>!();
+                }
+                "
+            ),
+            @r###"
+        [
+            CompletionItem {
+                label: "frobnicate!",
+                source_range: [56; 60),
+                delete: [56; 60),
+                insert: "frobnicate",
+                kind: Macro,
+                detail: "macro_rules! frobnicate",
+            },
+            CompletionItem {
+                label: "main()",
+                source_range: [56; 60),
+                delete: [56; 60),
+                insert: "main()$0",
+                kind: Function,
+                lookup: "main",
+                detail: "fn main()",
+            },
+        ]
+        "###
+        );
     }
 }
diff --git a/crates/ra_ide/src/diagnostics.rs b/crates/ra_ide/src/diagnostics.rs
index c1d7ddaf2..901ad104c 100644
--- a/crates/ra_ide/src/diagnostics.rs
+++ b/crates/ra_ide/src/diagnostics.rs
@@ -101,6 +101,14 @@ pub(crate) fn diagnostics(db: &RootDatabase, file_id: FileId) -> Vec<Diagnostic>
             fix,
         })
     })
+    .on::<hir::diagnostics::MissingMatchArms, _>(|d| {
+        res.borrow_mut().push(Diagnostic {
+            range: d.highlight_range(),
+            message: d.message(),
+            severity: Severity::Error,
+            fix: None,
+        })
+    })
     .on::<hir::diagnostics::MissingOkInTailExpr, _>(|d| {
         let node = d.ast(db);
         let replacement = format!("Ok({})", node.syntax());
@@ -291,7 +299,7 @@ mod tests {
     fn check_no_diagnostic(content: &str) {
         let (analysis, file_id) = single_file(content);
         let diagnostics = analysis.diagnostics(file_id).unwrap();
-        assert_eq!(diagnostics.len(), 0);
+        assert_eq!(diagnostics.len(), 0, "expected no diagnostic, found one");
     }
 
     #[test]
diff --git a/crates/ra_ide/src/display/navigation_target.rs b/crates/ra_ide/src/display/navigation_target.rs
index d57451cc8..e61846995 100644
--- a/crates/ra_ide/src/display/navigation_target.rs
+++ b/crates/ra_ide/src/display/navigation_target.rs
@@ -399,17 +399,17 @@ pub(crate) fn docs_from_symbol(db: &RootDatabase, symbol: &FileSymbol) -> Option
 
     match_ast! {
         match node {
-            ast::FnDef(it) => { it.doc_comment_text() },
-            ast::StructDef(it) => { it.doc_comment_text() },
-            ast::EnumDef(it) => { it.doc_comment_text() },
-            ast::TraitDef(it) => { it.doc_comment_text() },
-            ast::Module(it) => { it.doc_comment_text() },
-            ast::TypeAliasDef(it) => { it.doc_comment_text() },
-            ast::ConstDef(it) => { it.doc_comment_text() },
-            ast::StaticDef(it) => { it.doc_comment_text() },
-            ast::RecordFieldDef(it) => { it.doc_comment_text() },
-            ast::EnumVariant(it) => { it.doc_comment_text() },
-            ast::MacroCall(it) => { it.doc_comment_text() },
+            ast::FnDef(it) => it.doc_comment_text(),
+            ast::StructDef(it) => it.doc_comment_text(),
+            ast::EnumDef(it) => it.doc_comment_text(),
+            ast::TraitDef(it) => it.doc_comment_text(),
+            ast::Module(it) => it.doc_comment_text(),
+            ast::TypeAliasDef(it) => it.doc_comment_text(),
+            ast::ConstDef(it) => it.doc_comment_text(),
+            ast::StaticDef(it) => it.doc_comment_text(),
+            ast::RecordFieldDef(it) => it.doc_comment_text(),
+            ast::EnumVariant(it) => it.doc_comment_text(),
+            ast::MacroCall(it) => it.doc_comment_text(),
             _ => None,
         }
     }
@@ -424,16 +424,16 @@ pub(crate) fn description_from_symbol(db: &RootDatabase, symbol: &FileSymbol) ->
 
     match_ast! {
         match node {
-            ast::FnDef(it) => { it.short_label() },
-            ast::StructDef(it) => { it.short_label() },
-            ast::EnumDef(it) => { it.short_label() },
-            ast::TraitDef(it) => { it.short_label() },
-            ast::Module(it) => { it.short_label() },
-            ast::TypeAliasDef(it) => { it.short_label() },
-            ast::ConstDef(it) => { it.short_label() },
-            ast::StaticDef(it) => { it.short_label() },
-            ast::RecordFieldDef(it) => { it.short_label() },
-            ast::EnumVariant(it) => { it.short_label() },
+            ast::FnDef(it) => it.short_label(),
+            ast::StructDef(it) => it.short_label(),
+            ast::EnumDef(it) => it.short_label(),
+            ast::TraitDef(it) => it.short_label(),
+            ast::Module(it) => it.short_label(),
+            ast::TypeAliasDef(it) => it.short_label(),
+            ast::ConstDef(it) => it.short_label(),
+            ast::StaticDef(it) => it.short_label(),
+            ast::RecordFieldDef(it) => it.short_label(),
+            ast::EnumVariant(it) => it.short_label(),
             _ => None,
         }
     }
diff --git a/crates/ra_ide/src/display/structure.rs b/crates/ra_ide/src/display/structure.rs
index 5774e9a8b..7a774785c 100644
--- a/crates/ra_ide/src/display/structure.rs
+++ b/crates/ra_ide/src/display/structure.rs
@@ -117,18 +117,18 @@ fn structure_node(node: &SyntaxNode) -> Option<StructureNode> {
 
                 decl_with_detail(it, Some(detail))
             },
-            ast::StructDef(it) => { decl(it) },
-            ast::EnumDef(it) => { decl(it) },
-            ast::EnumVariant(it) => { decl(it) },
-            ast::TraitDef(it) => { decl(it) },
-            ast::Module(it) => { decl(it) },
+            ast::StructDef(it) => decl(it),
+            ast::EnumDef(it) => decl(it),
+            ast::EnumVariant(it) => decl(it),
+            ast::TraitDef(it) => decl(it),
+            ast::Module(it) => decl(it),
             ast::TypeAliasDef(it) => {
                 let ty = it.type_ref();
                 decl_with_type_ref(it, ty)
             },
-            ast::RecordFieldDef(it) => { decl_with_ascription(it) },
-            ast::ConstDef(it) => { decl_with_ascription(it) },
-            ast::StaticDef(it) => { decl_with_ascription(it) },
+            ast::RecordFieldDef(it) => decl_with_ascription(it),
+            ast::ConstDef(it) => decl_with_ascription(it),
+            ast::StaticDef(it) => decl_with_ascription(it),
             ast::ImplDef(it) => {
                 let target_type = it.target_type()?;
                 let target_trait = it.target_trait();
diff --git a/crates/ra_ide/src/goto_type_definition.rs b/crates/ra_ide/src/goto_type_definition.rs
index 869a4708b..bd2688df1 100644
--- a/crates/ra_ide/src/goto_type_definition.rs
+++ b/crates/ra_ide/src/goto_type_definition.rs
@@ -18,9 +18,9 @@ pub(crate) fn goto_type_definition(
     let (ty, node) = sema.ancestors_with_macros(token.parent()).find_map(|node| {
         let ty = match_ast! {
             match node {
-                ast::Expr(expr) => { sema.type_of_expr(&expr)? },
-                ast::Pat(pat) => { sema.type_of_pat(&pat)? },
-                _ => { return None },
+                ast::Expr(expr) => sema.type_of_expr(&expr)?,
+                ast::Pat(pat) => sema.type_of_pat(&pat)?,
+                _ => return None,
             }
         };
 
diff --git a/crates/ra_ide/src/lib.rs b/crates/ra_ide/src/lib.rs
index 285381086..5599f143f 100644
--- a/crates/ra_ide/src/lib.rs
+++ b/crates/ra_ide/src/lib.rs
@@ -10,6 +10,11 @@
 // For proving that RootDatabase is RefUnwindSafe.
 #![recursion_limit = "128"]
 
+#[allow(unused)]
+macro_rules! eprintln {
+    ($($tt:tt)*) => { stdx::eprintln!($($tt)*) };
+}
+
 pub mod mock_analysis;
 mod source_change;
 
diff --git a/crates/ra_ide/src/marks.rs b/crates/ra_ide/src/marks.rs
index 1236cb773..5e1f135c5 100644
--- a/crates/ra_ide/src/marks.rs
+++ b/crates/ra_ide/src/marks.rs
@@ -7,4 +7,5 @@ test_utils::marks!(
     dont_complete_current_use
     test_resolve_parent_module_on_module_decl
     search_filters_by_range
+    dont_insert_macro_call_parens_unncessary
 );
diff --git a/crates/ra_ide/src/runnables.rs b/crates/ra_ide/src/runnables.rs
index 74877e90f..9433f3a24 100644
--- a/crates/ra_ide/src/runnables.rs
+++ b/crates/ra_ide/src/runnables.rs
@@ -49,8 +49,8 @@ pub(crate) fn runnables(db: &RootDatabase, file_id: FileId) -> Vec<Runnable> {
 fn runnable(sema: &Semantics<RootDatabase>, item: SyntaxNode) -> Option<Runnable> {
     match_ast! {
         match item {
-            ast::FnDef(it) => { runnable_fn(sema, it) },
-            ast::Module(it) => { runnable_mod(sema, it) },
+            ast::FnDef(it) => runnable_fn(sema, it),
+            ast::Module(it) => runnable_mod(sema, it),
             _ => None,
         }
     }
diff --git a/crates/ra_ide_db/src/search.rs b/crates/ra_ide_db/src/search.rs
index 05a0eed30..1bf014149 100644
--- a/crates/ra_ide_db/src/search.rs
+++ b/crates/ra_ide_db/src/search.rs
@@ -286,7 +286,7 @@ fn reference_access(def: &Definition, name_ref: &ast::NameRef) -> Option<Referen
                     }
                     Some(ReferenceAccess::Read)
                 },
-                _ => {None}
+                _ => None
             }
         }
     });
diff --git a/crates/ra_ide_db/src/symbol_index.rs b/crates/ra_ide_db/src/symbol_index.rs
index 0f46f93c1..d30458d86 100644
--- a/crates/ra_ide_db/src/symbol_index.rs
+++ b/crates/ra_ide_db/src/symbol_index.rs
@@ -354,14 +354,14 @@ fn to_symbol(node: &SyntaxNode) -> Option<(SmolStr, SyntaxNodePtr, TextRange)> {
     }
     match_ast! {
         match node {
-            ast::FnDef(it) => { decl(it) },
-            ast::StructDef(it) => { decl(it) },
-            ast::EnumDef(it) => { decl(it) },
-            ast::TraitDef(it) => { decl(it) },
-            ast::Module(it) => { decl(it) },
-            ast::TypeAliasDef(it) => { decl(it) },
-            ast::ConstDef(it) => { decl(it) },
-            ast::StaticDef(it) => { decl(it) },
+            ast::FnDef(it) => decl(it),
+            ast::StructDef(it) => decl(it),
+            ast::EnumDef(it) => decl(it),
+            ast::TraitDef(it) => decl(it),
+            ast::Module(it) => decl(it),
+            ast::TypeAliasDef(it) => decl(it),
+            ast::ConstDef(it) => decl(it),
+            ast::StaticDef(it) => decl(it),
             ast::MacroCall(it) => {
                 if it.is_macro_rules().is_some() {
                     decl(it)
diff --git a/crates/ra_syntax/src/tests.rs b/crates/ra_syntax/src/tests.rs
index 6a8cb6bb5..355843b94 100644
--- a/crates/ra_syntax/src/tests.rs
+++ b/crates/ra_syntax/src/tests.rs
@@ -3,7 +3,7 @@ use std::{
     path::{Component, Path, PathBuf},
 };
 
-use test_utils::{collect_tests, dir_tests, project_dir, read_text};
+use test_utils::{collect_rust_files, dir_tests, project_dir, read_text};
 
 use crate::{fuzz, tokenize, SourceFile, SyntaxError, TextRange, TextUnit, Token};
 
@@ -13,12 +13,12 @@ fn lexer_tests() {
     // * Add tests for unicode escapes in byte-character and [raw]-byte-string literals
     // * Add tests for unescape errors
 
-    dir_tests(&test_data_dir(), &["lexer/ok"], |text, path| {
+    dir_tests(&test_data_dir(), &["lexer/ok"], "txt", |text, path| {
         let (tokens, errors) = tokenize(text);
         assert_errors_are_absent(&errors, path);
         dump_tokens_and_errors(&tokens, &errors, text)
     });
-    dir_tests(&test_data_dir(), &["lexer/err"], |text, path| {
+    dir_tests(&test_data_dir(), &["lexer/err"], "txt", |text, path| {
         let (tokens, errors) = tokenize(text);
         assert_errors_are_present(&errors, path);
         dump_tokens_and_errors(&tokens, &errors, text)
@@ -40,13 +40,13 @@ fn main() {
 
 #[test]
 fn parser_tests() {
-    dir_tests(&test_data_dir(), &["parser/inline/ok", "parser/ok"], |text, path| {
+    dir_tests(&test_data_dir(), &["parser/inline/ok", "parser/ok"], "rast", |text, path| {
         let parse = SourceFile::parse(text);
         let errors = parse.errors();
         assert_errors_are_absent(&errors, path);
         parse.debug_dump()
     });
-    dir_tests(&test_data_dir(), &["parser/err", "parser/inline/err"], |text, path| {
+    dir_tests(&test_data_dir(), &["parser/err", "parser/inline/err"], "rast", |text, path| {
         let parse = SourceFile::parse(text);
         let errors = parse.errors();
         assert_errors_are_present(&errors, path);
@@ -56,14 +56,14 @@ fn parser_tests() {
 
 #[test]
 fn parser_fuzz_tests() {
-    for (_, text) in collect_tests(&test_data_dir(), &["parser/fuzz-failures"]) {
+    for (_, text) in collect_rust_files(&test_data_dir(), &["parser/fuzz-failures"]) {
         fuzz::check_parser(&text)
     }
 }
 
 #[test]
 fn reparse_fuzz_tests() {
-    for (_, text) in collect_tests(&test_data_dir(), &["reparse/fuzz-failures"]) {
+    for (_, text) in collect_rust_files(&test_data_dir(), &["reparse/fuzz-failures"]) {
         let check = fuzz::CheckReparse::from_data(text.as_bytes()).unwrap();
         println!("{:?}", check);
         check.run();
diff --git a/crates/ra_syntax/src/validation.rs b/crates/ra_syntax/src/validation.rs
index 7915cf8cb..f85b3e61b 100644
--- a/crates/ra_syntax/src/validation.rs
+++ b/crates/ra_syntax/src/validation.rs
@@ -88,12 +88,12 @@ pub(crate) fn validate(root: &SyntaxNode) -> Vec<SyntaxError> {
     for node in root.descendants() {
         match_ast! {
             match node {
-                ast::Literal(it) => { validate_literal(it, &mut errors) },
-                ast::BlockExpr(it) => { block::validate_block_expr(it, &mut errors) },
-                ast::FieldExpr(it) => { validate_numeric_name(it.name_ref(), &mut errors) },
-                ast::RecordField(it) => { validate_numeric_name(it.name_ref(), &mut errors) },
-                ast::Visibility(it) => { validate_visibility(it, &mut errors) },
-                ast::RangeExpr(it) => { validate_range_expr(it, &mut errors) },
+                ast::Literal(it) => validate_literal(it, &mut errors),
+                ast::BlockExpr(it) => block::validate_block_expr(it, &mut errors),
+                ast::FieldExpr(it) => validate_numeric_name(it.name_ref(), &mut errors),
+                ast::RecordField(it) => validate_numeric_name(it.name_ref(), &mut errors),
+                ast::Visibility(it) => validate_visibility(it, &mut errors),
+                ast::RangeExpr(it) => validate_range_expr(it, &mut errors),
                 _ => (),
             }
         }
diff --git a/crates/ra_syntax/test_data/parser/err/0000_struct_field_missing_comma.txt b/crates/ra_syntax/test_data/parser/err/0000_struct_field_missing_comma.rast
index edcd936b0..edcd936b0 100644
--- a/crates/ra_syntax/test_data/parser/err/0000_struct_field_missing_comma.txt
+++ b/crates/ra_syntax/test_data/parser/err/0000_struct_field_missing_comma.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0001_item_recovery_in_file.txt b/crates/ra_syntax/test_data/parser/err/0001_item_recovery_in_file.rast
index 2d653715e..2d653715e 100644
--- a/crates/ra_syntax/test_data/parser/err/0001_item_recovery_in_file.txt
+++ b/crates/ra_syntax/test_data/parser/err/0001_item_recovery_in_file.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0002_duplicate_shebang.txt b/crates/ra_syntax/test_data/parser/err/0002_duplicate_shebang.rast
index 002680583..002680583 100644
--- a/crates/ra_syntax/test_data/parser/err/0002_duplicate_shebang.txt
+++ b/crates/ra_syntax/test_data/parser/err/0002_duplicate_shebang.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0003_C++_semicolon.txt b/crates/ra_syntax/test_data/parser/err/0003_C++_semicolon.rast
index 8039a8913..8039a8913 100644
--- a/crates/ra_syntax/test_data/parser/err/0003_C++_semicolon.txt
+++ b/crates/ra_syntax/test_data/parser/err/0003_C++_semicolon.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0004_use_path_bad_segment.txt b/crates/ra_syntax/test_data/parser/err/0004_use_path_bad_segment.rast
index 5f6e10986..5f6e10986 100644
--- a/crates/ra_syntax/test_data/parser/err/0004_use_path_bad_segment.txt
+++ b/crates/ra_syntax/test_data/parser/err/0004_use_path_bad_segment.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0005_attribute_recover.txt b/crates/ra_syntax/test_data/parser/err/0005_attribute_recover.rast
index cc11421a9..cc11421a9 100644
--- a/crates/ra_syntax/test_data/parser/err/0005_attribute_recover.txt
+++ b/crates/ra_syntax/test_data/parser/err/0005_attribute_recover.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0006_named_field_recovery.txt b/crates/ra_syntax/test_data/parser/err/0006_named_field_recovery.rast
index 84fd92862..84fd92862 100644
--- a/crates/ra_syntax/test_data/parser/err/0006_named_field_recovery.txt
+++ b/crates/ra_syntax/test_data/parser/err/0006_named_field_recovery.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0007_stray_curly_in_file.txt b/crates/ra_syntax/test_data/parser/err/0007_stray_curly_in_file.rast
index 1978f30fa..1978f30fa 100644
--- a/crates/ra_syntax/test_data/parser/err/0007_stray_curly_in_file.txt
+++ b/crates/ra_syntax/test_data/parser/err/0007_stray_curly_in_file.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0008_item_block_recovery.txt b/crates/ra_syntax/test_data/parser/err/0008_item_block_recovery.rast
index 98248227d..98248227d 100644
--- a/crates/ra_syntax/test_data/parser/err/0008_item_block_recovery.txt
+++ b/crates/ra_syntax/test_data/parser/err/0008_item_block_recovery.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0009_broken_struct_type_parameter.txt b/crates/ra_syntax/test_data/parser/err/0009_broken_struct_type_parameter.rast
index ca508ac7c..ca508ac7c 100644
--- a/crates/ra_syntax/test_data/parser/err/0009_broken_struct_type_parameter.txt
+++ b/crates/ra_syntax/test_data/parser/err/0009_broken_struct_type_parameter.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0010_unsafe_lambda_block.txt b/crates/ra_syntax/test_data/parser/err/0010_unsafe_lambda_block.rast
index 0ffbd25aa..0ffbd25aa 100644
--- a/crates/ra_syntax/test_data/parser/err/0010_unsafe_lambda_block.txt
+++ b/crates/ra_syntax/test_data/parser/err/0010_unsafe_lambda_block.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0011_extern_struct.txt b/crates/ra_syntax/test_data/parser/err/0011_extern_struct.rast
index 900894dcf..900894dcf 100644
--- a/crates/ra_syntax/test_data/parser/err/0011_extern_struct.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0012_broken_lambda.txt b/crates/ra_syntax/test_data/parser/err/0012_broken_lambda.rast
index 12ebc2a3a..12ebc2a3a 100644
--- a/crates/ra_syntax/test_data/parser/err/0012_broken_lambda.txt
+++ b/crates/ra_syntax/test_data/parser/err/0012_broken_lambda.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0013_invalid_type.txt b/crates/ra_syntax/test_data/parser/err/0013_invalid_type.rast
index 7a934cf66..7a934cf66 100644
--- a/crates/ra_syntax/test_data/parser/err/0013_invalid_type.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0014_where_no_bounds.txt b/crates/ra_syntax/test_data/parser/err/0014_where_no_bounds.rast
index a25d641b8..a25d641b8 100644
--- a/crates/ra_syntax/test_data/parser/err/0014_where_no_bounds.txt
+++ b/crates/ra_syntax/test_data/parser/err/0014_where_no_bounds.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0015_curly_in_params.txt b/crates/ra_syntax/test_data/parser/err/0015_curly_in_params.rast
index 36b848be3..36b848be3 100644
--- a/crates/ra_syntax/test_data/parser/err/0015_curly_in_params.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0016_missing_semi.txt b/crates/ra_syntax/test_data/parser/err/0016_missing_semi.rast
index 6343580e0..6343580e0 100644
--- a/crates/ra_syntax/test_data/parser/err/0016_missing_semi.txt
+++ b/crates/ra_syntax/test_data/parser/err/0016_missing_semi.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0017_incomplete_binexpr.txt b/crates/ra_syntax/test_data/parser/err/0017_incomplete_binexpr.rast
index 59480e999..59480e999 100644
--- a/crates/ra_syntax/test_data/parser/err/0017_incomplete_binexpr.txt
+++ b/crates/ra_syntax/test_data/parser/err/0017_incomplete_binexpr.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0018_incomplete_fn.txt b/crates/ra_syntax/test_data/parser/err/0018_incomplete_fn.rast
index 4b13a7236..4b13a7236 100644
--- a/crates/ra_syntax/test_data/parser/err/0018_incomplete_fn.txt
+++ b/crates/ra_syntax/test_data/parser/err/0018_incomplete_fn.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0019_let_recover.txt b/crates/ra_syntax/test_data/parser/err/0019_let_recover.rast
index 97e91a94f..97e91a94f 100644
--- a/crates/ra_syntax/test_data/parser/err/0019_let_recover.txt
+++ b/crates/ra_syntax/test_data/parser/err/0019_let_recover.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0020_fn_recover.txt b/crates/ra_syntax/test_data/parser/err/0020_fn_recover.rast
index c11dc23f5..c11dc23f5 100644
--- a/crates/ra_syntax/test_data/parser/err/0020_fn_recover.txt
+++ b/crates/ra_syntax/test_data/parser/err/0020_fn_recover.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0021_incomplete_param.txt b/crates/ra_syntax/test_data/parser/err/0021_incomplete_param.rast
index ae04122d8..ae04122d8 100644
--- a/crates/ra_syntax/test_data/parser/err/0021_incomplete_param.txt
+++ b/crates/ra_syntax/test_data/parser/err/0021_incomplete_param.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0022_bad_exprs.txt b/crates/ra_syntax/test_data/parser/err/0022_bad_exprs.rast
index 9f50c85e5..9f50c85e5 100644
--- a/crates/ra_syntax/test_data/parser/err/0022_bad_exprs.txt
+++ b/crates/ra_syntax/test_data/parser/err/0022_bad_exprs.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0023_mismatched_paren.txt b/crates/ra_syntax/test_data/parser/err/0023_mismatched_paren.rast
index 775e4b0da..775e4b0da 100644
--- a/crates/ra_syntax/test_data/parser/err/0023_mismatched_paren.txt
+++ b/crates/ra_syntax/test_data/parser/err/0023_mismatched_paren.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0024_many_type_parens.txt b/crates/ra_syntax/test_data/parser/err/0024_many_type_parens.rast
index c5c8a29ba..c5c8a29ba 100644
--- a/crates/ra_syntax/test_data/parser/err/0024_many_type_parens.txt
+++ b/crates/ra_syntax/test_data/parser/err/0024_many_type_parens.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0025_nope.txt b/crates/ra_syntax/test_data/parser/err/0025_nope.rast
index ca7f2d255..ca7f2d255 100644
--- a/crates/ra_syntax/test_data/parser/err/0025_nope.txt
+++ b/crates/ra_syntax/test_data/parser/err/0025_nope.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0026_imp_recovery.txt b/crates/ra_syntax/test_data/parser/err/0026_imp_recovery.rast
index f239b7b1e..f239b7b1e 100644
--- a/crates/ra_syntax/test_data/parser/err/0026_imp_recovery.txt
+++ b/crates/ra_syntax/test_data/parser/err/0026_imp_recovery.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0027_incomplere_where_for.txt b/crates/ra_syntax/test_data/parser/err/0027_incomplere_where_for.rast
index 4a28bcabf..4a28bcabf 100644
--- a/crates/ra_syntax/test_data/parser/err/0027_incomplere_where_for.txt
+++ b/crates/ra_syntax/test_data/parser/err/0027_incomplere_where_for.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0029_field_completion.txt b/crates/ra_syntax/test_data/parser/err/0029_field_completion.rast
index 177849476..177849476 100644
--- a/crates/ra_syntax/test_data/parser/err/0029_field_completion.txt
+++ b/crates/ra_syntax/test_data/parser/err/0029_field_completion.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0031_block_inner_attrs.txt b/crates/ra_syntax/test_data/parser/err/0031_block_inner_attrs.rast
index 522a0d0e0..522a0d0e0 100644
--- a/crates/ra_syntax/test_data/parser/err/0031_block_inner_attrs.txt
+++ b/crates/ra_syntax/test_data/parser/err/0031_block_inner_attrs.rast
diff --git a/crates/ra_syntax/test_data/parser/err/0032_match_arms_inner_attrs.txt b/crates/ra_syntax/test_data/parser/err/0032_match_arms_inner_attrs.rast
index c36e2f770..c36e2f770 100644
--- a/crates/ra_syntax/test_data/parser/err/0032_match_arms_inner_attrs.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0033_match_arms_outer_attrs.txt b/crates/ra_syntax/test_data/parser/err/0033_match_arms_outer_attrs.rast
index e914e688b..e914e688b 100644
--- a/crates/ra_syntax/test_data/parser/err/0033_match_arms_outer_attrs.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0034_bad_box_pattern.txt b/crates/ra_syntax/test_data/parser/err/0034_bad_box_pattern.rast
index 2c91b6841..2c91b6841 100644
--- a/crates/ra_syntax/test_data/parser/err/0034_bad_box_pattern.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0035_use_recover.txt b/crates/ra_syntax/test_data/parser/err/0035_use_recover.rast
index 8cb4ea796..8cb4ea796 100644
--- a/crates/ra_syntax/test_data/parser/err/0035_use_recover.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0036_partial_use.txt b/crates/ra_syntax/test_data/parser/err/0036_partial_use.rast
index f5490fbe8..f5490fbe8 100644
--- a/crates/ra_syntax/test_data/parser/err/0036_partial_use.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0037_visibility_in_traits.txt b/crates/ra_syntax/test_data/parser/err/0037_visibility_in_traits.rast
index d8622d45f..d8622d45f 100644
--- a/crates/ra_syntax/test_data/parser/err/0037_visibility_in_traits.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0038_endless_inclusive_range.txt b/crates/ra_syntax/test_data/parser/err/0038_endless_inclusive_range.rast
index 3810b9680..3810b9680 100644
--- a/crates/ra_syntax/test_data/parser/err/0038_endless_inclusive_range.txt
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diff --git a/crates/ra_syntax/test_data/parser/err/0039_lambda_recovery.txt b/crates/ra_syntax/test_data/parser/err/0039_lambda_recovery.rast
index 4a2f0a696..4a2f0a696 100644
--- a/crates/ra_syntax/test_data/parser/err/0039_lambda_recovery.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0001_array_type_missing_semi.txt b/crates/ra_syntax/test_data/parser/inline/err/0001_array_type_missing_semi.rast
index 530533b71..530533b71 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0001_array_type_missing_semi.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0002_misplaced_label_err.txt b/crates/ra_syntax/test_data/parser/inline/err/0002_misplaced_label_err.rast
index 01a853d63..01a853d63 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0002_misplaced_label_err.txt
+++ b/crates/ra_syntax/test_data/parser/inline/err/0002_misplaced_label_err.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/err/0003_pointer_type_no_mutability.txt b/crates/ra_syntax/test_data/parser/inline/err/0003_pointer_type_no_mutability.rast
index 2ab29eecc..2ab29eecc 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0003_pointer_type_no_mutability.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0004_impl_type.txt b/crates/ra_syntax/test_data/parser/inline/err/0004_impl_type.rast
index 124f0a891..124f0a891 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0004_impl_type.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0005_fn_pointer_type_missing_fn.txt b/crates/ra_syntax/test_data/parser/inline/err/0005_fn_pointer_type_missing_fn.rast
index 9e9186ad4..9e9186ad4 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0005_fn_pointer_type_missing_fn.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0006_unsafe_block_in_mod.txt b/crates/ra_syntax/test_data/parser/inline/err/0006_unsafe_block_in_mod.rast
index 690acdca3..690acdca3 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0006_unsafe_block_in_mod.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0007_async_without_semicolon.txt b/crates/ra_syntax/test_data/parser/inline/err/0007_async_without_semicolon.rast
index a4002a998..a4002a998 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0007_async_without_semicolon.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0008_pub_expr.txt b/crates/ra_syntax/test_data/parser/inline/err/0008_pub_expr.rast
index 6f45a4fa6..6f45a4fa6 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0008_pub_expr.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0009_attr_on_expr_not_allowed.txt b/crates/ra_syntax/test_data/parser/inline/err/0009_attr_on_expr_not_allowed.rast
index e6d3a5c95..e6d3a5c95 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0009_attr_on_expr_not_allowed.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0010_bad_tuple_index_expr.txt b/crates/ra_syntax/test_data/parser/inline/err/0010_bad_tuple_index_expr.rast
index 8ad2a588f..8ad2a588f 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0010_bad_tuple_index_expr.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0010_wrong_order_fns.txt b/crates/ra_syntax/test_data/parser/inline/err/0010_wrong_order_fns.rast
index f6ac0feaf..f6ac0feaf 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0010_wrong_order_fns.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0013_static_underscore.txt b/crates/ra_syntax/test_data/parser/inline/err/0013_static_underscore.rast
index 5b3dc5af2..5b3dc5af2 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0013_static_underscore.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/err/0014_default_fn_type.txt b/crates/ra_syntax/test_data/parser/inline/err/0014_default_fn_type.rast
index 25d80be1d..25d80be1d 100644
--- a/crates/ra_syntax/test_data/parser/inline/err/0014_default_fn_type.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0001_trait_item_list.txt b/crates/ra_syntax/test_data/parser/inline/ok/0001_trait_item_list.rast
index ad9f0965e..ad9f0965e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0001_trait_item_list.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0002_use_tree_list.txt b/crates/ra_syntax/test_data/parser/inline/ok/0002_use_tree_list.rast
index 1b318dfb9..1b318dfb9 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0002_use_tree_list.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0003_where_pred_for.txt b/crates/ra_syntax/test_data/parser/inline/ok/0003_where_pred_for.rast
index e3f5a7f04..e3f5a7f04 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0003_where_pred_for.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0004_value_parameters_no_patterns.txt b/crates/ra_syntax/test_data/parser/inline/ok/0004_value_parameters_no_patterns.rast
index 9241f6fb2..9241f6fb2 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0004_value_parameters_no_patterns.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0005_function_type_params.txt b/crates/ra_syntax/test_data/parser/inline/ok/0005_function_type_params.rast
index 8ae7909f9..8ae7909f9 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0005_function_type_params.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0006_self_param.txt b/crates/ra_syntax/test_data/parser/inline/ok/0006_self_param.rast
index 757ac092a..757ac092a 100644
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0007_type_param_bounds.txt b/crates/ra_syntax/test_data/parser/inline/ok/0007_type_param_bounds.rast
index a7186c7a8..a7186c7a8 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0007_type_param_bounds.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0008_path_part.txt b/crates/ra_syntax/test_data/parser/inline/ok/0008_path_part.rast
index 3812adc9e..3812adc9e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0008_path_part.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0009_loop_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0009_loop_expr.rast
index 2d8872022..2d8872022 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0009_loop_expr.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0010_extern_block.txt b/crates/ra_syntax/test_data/parser/inline/ok/0010_extern_block.rast
index 506f56fff..506f56fff 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0010_extern_block.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0011_field_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0011_field_expr.rast
index 29b268b55..29b268b55 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0011_field_expr.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0012_type_item_where_clause.txt b/crates/ra_syntax/test_data/parser/inline/ok/0012_type_item_where_clause.rast
index da04dac5c..da04dac5c 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0012_type_item_where_clause.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0013_pointer_type_mut.txt b/crates/ra_syntax/test_data/parser/inline/ok/0013_pointer_type_mut.rast
index c05f873d6..c05f873d6 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0013_pointer_type_mut.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0014_never_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0014_never_type.rast
index ac53e4fd3..ac53e4fd3 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0014_never_type.txt
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diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0015_continue_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0015_continue_expr.rast
index c051c1c86..c051c1c86 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0015_continue_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0015_continue_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0016_unsafe_trait.txt b/crates/ra_syntax/test_data/parser/inline/ok/0016_unsafe_trait.rast
index 7b43f1294..7b43f1294 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0016_unsafe_trait.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0016_unsafe_trait.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0017_array_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0017_array_type.rast
index b4055c9f0..b4055c9f0 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0017_array_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0017_array_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0018_arb_self_types.txt b/crates/ra_syntax/test_data/parser/inline/ok/0018_arb_self_types.rast
index 89caee543..89caee543 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0018_arb_self_types.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0018_arb_self_types.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0019_unary_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0019_unary_expr.rast
index 2d71efd86..2d71efd86 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0019_unary_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0019_unary_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0020_use_star.txt b/crates/ra_syntax/test_data/parser/inline/ok/0020_use_star.rast
index dd2095d90..dd2095d90 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0020_use_star.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0020_use_star.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0021_impl_item_list.txt b/crates/ra_syntax/test_data/parser/inline/ok/0021_impl_item_list.rast
index b1af67976..b1af67976 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0021_impl_item_list.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0021_impl_item_list.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0022_crate_visibility.txt b/crates/ra_syntax/test_data/parser/inline/ok/0022_crate_visibility.rast
index 891943f6e..891943f6e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0022_crate_visibility.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0022_crate_visibility.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0023_placeholder_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0023_placeholder_type.rast
index 0f32aec9e..0f32aec9e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0023_placeholder_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0023_placeholder_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0024_slice_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0024_slice_pat.rast
index 48aaeaf07..48aaeaf07 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0024_slice_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0024_slice_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0025_slice_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0025_slice_type.rast
index b3a24281e..b3a24281e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0025_slice_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0025_slice_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0026_tuple_pat_fields.txt b/crates/ra_syntax/test_data/parser/inline/ok/0026_tuple_pat_fields.rast
index 666386d31..666386d31 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0026_tuple_pat_fields.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0026_tuple_pat_fields.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0027_ref_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0027_ref_pat.rast
index 0f1a367f7..0f1a367f7 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0027_ref_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0027_ref_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0028_impl_trait_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0028_impl_trait_type.rast
index f07027fa7..f07027fa7 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0028_impl_trait_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0028_impl_trait_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0029_cast_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0029_cast_expr.rast
index b17a2c257..b17a2c257 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0029_cast_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0029_cast_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0030_cond.txt b/crates/ra_syntax/test_data/parser/inline/ok/0030_cond.rast
index 6fd49c7bc..6fd49c7bc 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0030_cond.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0030_cond.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0031_while_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0031_while_expr.rast
index a6e14a114..a6e14a114 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0031_while_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0031_while_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0032_fn_pointer_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0032_fn_pointer_type.rast
index 4c17f0db8..4c17f0db8 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0032_fn_pointer_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0032_fn_pointer_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0033_reference_type;.txt b/crates/ra_syntax/test_data/parser/inline/ok/0033_reference_type;.rast
index 7642ea659..7642ea659 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0033_reference_type;.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0033_reference_type;.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0034_break_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0034_break_expr.rast
index 67ffdfd67..67ffdfd67 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0034_break_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0034_break_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0036_unsafe_extern_fn.txt b/crates/ra_syntax/test_data/parser/inline/ok/0036_unsafe_extern_fn.rast
index a7dfe167c..a7dfe167c 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0036_unsafe_extern_fn.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0036_unsafe_extern_fn.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0037_qual_paths.txt b/crates/ra_syntax/test_data/parser/inline/ok/0037_qual_paths.rast
index 6e226de4b..6e226de4b 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0037_qual_paths.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0037_qual_paths.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0038_full_range_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0038_full_range_expr.rast
index 042cee879..042cee879 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0038_full_range_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0038_full_range_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0039_type_arg.txt b/crates/ra_syntax/test_data/parser/inline/ok/0039_type_arg.rast
index 025faf5ca..025faf5ca 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0039_type_arg.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0039_type_arg.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0040_crate_keyword_vis.txt b/crates/ra_syntax/test_data/parser/inline/ok/0040_crate_keyword_vis.rast
index d180fcf20..d180fcf20 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0040_crate_keyword_vis.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0040_crate_keyword_vis.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0041_trait_item.txt b/crates/ra_syntax/test_data/parser/inline/ok/0041_trait_item.rast
index 578361715..578361715 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0041_trait_item.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0041_trait_item.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0042_call_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0042_call_expr.rast
index e8003bf91..e8003bf91 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0042_call_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0042_call_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0043_use_alias.txt b/crates/ra_syntax/test_data/parser/inline/ok/0043_use_alias.rast
index 18d8a151f..18d8a151f 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0043_use_alias.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0043_use_alias.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0044_block_items.txt b/crates/ra_syntax/test_data/parser/inline/ok/0044_block_items.rast
index e75d569f0..e75d569f0 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0044_block_items.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0044_block_items.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0045_param_list_opt_patterns.txt b/crates/ra_syntax/test_data/parser/inline/ok/0045_param_list_opt_patterns.rast
index 33886154d..33886154d 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0045_param_list_opt_patterns.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0045_param_list_opt_patterns.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0046_singleton_tuple_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0046_singleton_tuple_type.rast
index c7b4e614d..c7b4e614d 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0046_singleton_tuple_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0046_singleton_tuple_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0047_unsafe_default_impl.txt b/crates/ra_syntax/test_data/parser/inline/ok/0047_unsafe_default_impl.rast
index 0a768a8e3..0a768a8e3 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0047_unsafe_default_impl.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0047_unsafe_default_impl.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0048_path_type_with_bounds.txt b/crates/ra_syntax/test_data/parser/inline/ok/0048_path_type_with_bounds.rast
index 02f2a9db6..02f2a9db6 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0048_path_type_with_bounds.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0048_path_type_with_bounds.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0050_fn_decl.txt b/crates/ra_syntax/test_data/parser/inline/ok/0050_fn_decl.rast
index 19f961e29..19f961e29 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0050_fn_decl.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0050_fn_decl.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0051_unit_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0051_unit_type.rast
index 6a469f8aa..6a469f8aa 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0051_unit_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0051_unit_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0052_path_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0052_path_type.rast
index ee55ee219..ee55ee219 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0052_path_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0052_path_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0053_path_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0053_path_expr.rast
index f1018fcab..f1018fcab 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0053_path_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0053_path_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0054_record_field_attrs.txt b/crates/ra_syntax/test_data/parser/inline/ok/0054_record_field_attrs.rast
index 731c31f76..731c31f76 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0054_record_field_attrs.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0054_record_field_attrs.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0055_literal_pattern.txt b/crates/ra_syntax/test_data/parser/inline/ok/0055_literal_pattern.rast
index 2b28cec67..2b28cec67 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0055_literal_pattern.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0055_literal_pattern.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0056_where_clause.txt b/crates/ra_syntax/test_data/parser/inline/ok/0056_where_clause.rast
index 9a9a13370..9a9a13370 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0056_where_clause.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0056_where_clause.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0057_const_fn.txt b/crates/ra_syntax/test_data/parser/inline/ok/0057_const_fn.rast
index 9788197be..9788197be 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0057_const_fn.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0057_const_fn.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0058_range_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0058_range_pat.rast
index 3d659ce10..3d659ce10 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0058_range_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0058_range_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0059_match_arms_commas.txt b/crates/ra_syntax/test_data/parser/inline/ok/0059_match_arms_commas.rast
index efcd89c4c..efcd89c4c 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0059_match_arms_commas.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0059_match_arms_commas.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0060_extern_crate.txt b/crates/ra_syntax/test_data/parser/inline/ok/0060_extern_crate.rast
index 7667201ba..7667201ba 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0060_extern_crate.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0060_extern_crate.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0061_record_lit.txt b/crates/ra_syntax/test_data/parser/inline/ok/0061_record_lit.rast
index dcf527639..dcf527639 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0061_record_lit.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0061_record_lit.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0062_mod_contents.txt b/crates/ra_syntax/test_data/parser/inline/ok/0062_mod_contents.rast
index 6b528c252..6b528c252 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0062_mod_contents.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0062_mod_contents.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0063_impl_def_neg.txt b/crates/ra_syntax/test_data/parser/inline/ok/0063_impl_def_neg.rast
index 0cc3ac085..0cc3ac085 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0063_impl_def_neg.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0063_impl_def_neg.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0064_if_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0064_if_expr.rast
index 2ace3c8ee..2ace3c8ee 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0064_if_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0064_if_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0065_dyn_trait_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0065_dyn_trait_type.rast
index 2ee0dc199..2ee0dc199 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0065_dyn_trait_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0065_dyn_trait_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0066_match_arm.txt b/crates/ra_syntax/test_data/parser/inline/ok/0066_match_arm.rast
index 2f07af4e1..2f07af4e1 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0066_match_arm.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0066_match_arm.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0067_crate_path.txt b/crates/ra_syntax/test_data/parser/inline/ok/0067_crate_path.rast
index f2ba4e909..f2ba4e909 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0067_crate_path.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0067_crate_path.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0068_union_items.txt b/crates/ra_syntax/test_data/parser/inline/ok/0068_union_items.rast
index 9d7982684..9d7982684 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0068_union_items.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0068_union_items.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0069_use_tree_list_after_path.txt b/crates/ra_syntax/test_data/parser/inline/ok/0069_use_tree_list_after_path.rast
index 86afc9362..86afc9362 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0069_use_tree_list_after_path.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0069_use_tree_list_after_path.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0070_stmt_bin_expr_ambiguity.txt b/crates/ra_syntax/test_data/parser/inline/ok/0070_stmt_bin_expr_ambiguity.rast
index cd63d10f7..cd63d10f7 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0070_stmt_bin_expr_ambiguity.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0070_stmt_bin_expr_ambiguity.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0071_match_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0071_match_expr.rast
index 0af668056..0af668056 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0071_match_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0071_match_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0072_return_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0072_return_expr.rast
index 4a83a7200..4a83a7200 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0072_return_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0072_return_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0073_type_item_type_params.txt b/crates/ra_syntax/test_data/parser/inline/ok/0073_type_item_type_params.rast
index 2dd6db28f..2dd6db28f 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0073_type_item_type_params.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0073_type_item_type_params.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0074_stmt_postfix_expr_ambiguity.txt b/crates/ra_syntax/test_data/parser/inline/ok/0074_stmt_postfix_expr_ambiguity.rast
index cbd2d5fbf..cbd2d5fbf 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0074_stmt_postfix_expr_ambiguity.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0074_stmt_postfix_expr_ambiguity.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0075_block.txt b/crates/ra_syntax/test_data/parser/inline/ok/0075_block.rast
index 28d1bad97..28d1bad97 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0075_block.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0075_block.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0076_function_where_clause.txt b/crates/ra_syntax/test_data/parser/inline/ok/0076_function_where_clause.rast
index 8e4b63f02..8e4b63f02 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0076_function_where_clause.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0076_function_where_clause.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0077_try_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0077_try_expr.rast
index 18ccfe9ef..18ccfe9ef 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0077_try_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0077_try_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0078_type_item.txt b/crates/ra_syntax/test_data/parser/inline/ok/0078_type_item.rast
index 4bc0b1858..4bc0b1858 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0078_type_item.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0078_type_item.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0079_impl_def.txt b/crates/ra_syntax/test_data/parser/inline/ok/0079_impl_def.rast
index 4c2863ba7..4c2863ba7 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0079_impl_def.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0079_impl_def.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0080_postfix_range.txt b/crates/ra_syntax/test_data/parser/inline/ok/0080_postfix_range.rast
index 9f8a6b0f6..9f8a6b0f6 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0080_postfix_range.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0080_postfix_range.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0081_for_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0081_for_type.rast
index b1353c2c6..b1353c2c6 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0081_for_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0081_for_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0082_ref_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0082_ref_expr.rast
index 8f34afe76..8f34afe76 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0082_ref_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0082_ref_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0083_struct_items.txt b/crates/ra_syntax/test_data/parser/inline/ok/0083_struct_items.rast
index e909f2b78..e909f2b78 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0083_struct_items.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0083_struct_items.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0084_paren_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0084_paren_type.rast
index c0cf48af5..c0cf48af5 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0084_paren_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0084_paren_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0085_expr_literals.txt b/crates/ra_syntax/test_data/parser/inline/ok/0085_expr_literals.rast
index 2903c6f9a..2903c6f9a 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0085_expr_literals.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0085_expr_literals.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0086_function_ret_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0086_function_ret_type.rast
index ca1a97161..ca1a97161 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0086_function_ret_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0086_function_ret_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0087_unsafe_impl.txt b/crates/ra_syntax/test_data/parser/inline/ok/0087_unsafe_impl.rast
index e614acc6f..e614acc6f 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0087_unsafe_impl.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0087_unsafe_impl.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0088_break_ambiguity.txt b/crates/ra_syntax/test_data/parser/inline/ok/0088_break_ambiguity.rast
index b23f43b46..b23f43b46 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0088_break_ambiguity.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0088_break_ambiguity.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0089_extern_fn.txt b/crates/ra_syntax/test_data/parser/inline/ok/0089_extern_fn.rast
index b494f6c59..b494f6c59 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0089_extern_fn.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0089_extern_fn.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0090_type_param_default.txt b/crates/ra_syntax/test_data/parser/inline/ok/0090_type_param_default.rast
index 8d2579cd6..8d2579cd6 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0090_type_param_default.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0090_type_param_default.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0091_auto_trait.txt b/crates/ra_syntax/test_data/parser/inline/ok/0091_auto_trait.rast
index 7093c2b1f..7093c2b1f 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0091_auto_trait.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0091_auto_trait.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0092_fn_pointer_type_with_ret.txt b/crates/ra_syntax/test_data/parser/inline/ok/0092_fn_pointer_type_with_ret.rast
index fae822367..fae822367 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0092_fn_pointer_type_with_ret.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0092_fn_pointer_type_with_ret.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0093_index_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0093_index_expr.rast
index 1a979e597..1a979e597 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0093_index_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0093_index_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0094_unsafe_auto_trait.txt b/crates/ra_syntax/test_data/parser/inline/ok/0094_unsafe_auto_trait.rast
index 3da3beaf4..3da3beaf4 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0094_unsafe_auto_trait.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0094_unsafe_auto_trait.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0095_placeholder_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0095_placeholder_pat.rast
index fe86894a9..fe86894a9 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0095_placeholder_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0095_placeholder_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0096_no_semi_after_block.txt b/crates/ra_syntax/test_data/parser/inline/ok/0096_no_semi_after_block.rast
index 157aa29f5..157aa29f5 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0096_no_semi_after_block.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0096_no_semi_after_block.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0097_default_impl.txt b/crates/ra_syntax/test_data/parser/inline/ok/0097_default_impl.rast
index af9077270..af9077270 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0097_default_impl.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0097_default_impl.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0098_const_unsafe_fn.txt b/crates/ra_syntax/test_data/parser/inline/ok/0098_const_unsafe_fn.rast
index 072dc9d16..072dc9d16 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0098_const_unsafe_fn.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0098_const_unsafe_fn.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0099_param_list.txt b/crates/ra_syntax/test_data/parser/inline/ok/0099_param_list.rast
index ed57a9eea..ed57a9eea 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0099_param_list.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0099_param_list.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0100_for_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0100_for_expr.rast
index 83c58d25f..83c58d25f 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0100_for_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0100_for_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0101_unsafe_fn.txt b/crates/ra_syntax/test_data/parser/inline/ok/0101_unsafe_fn.rast
index b7979fbf5..b7979fbf5 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0101_unsafe_fn.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0101_unsafe_fn.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0102_record_field_pat_list.txt b/crates/ra_syntax/test_data/parser/inline/ok/0102_record_field_pat_list.rast
index d8e04bd90..d8e04bd90 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0102_record_field_pat_list.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0102_record_field_pat_list.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0103_array_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0103_array_expr.rast
index 0db62a1f5..0db62a1f5 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0103_array_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0103_array_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0104_path_fn_trait_args.txt b/crates/ra_syntax/test_data/parser/inline/ok/0104_path_fn_trait_args.rast
index a983d5954..a983d5954 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0104_path_fn_trait_args.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0104_path_fn_trait_args.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0105_block_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0105_block_expr.rast
index 6bce37a4f..6bce37a4f 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0105_block_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0105_block_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0106_lambda_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0106_lambda_expr.rast
index 0216123f0..0216123f0 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0106_lambda_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0106_lambda_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0107_method_call_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0107_method_call_expr.rast
index ba478528c..ba478528c 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0107_method_call_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0107_method_call_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0108_tuple_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0108_tuple_expr.rast
index 6f685ca8d..6f685ca8d 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0108_tuple_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0108_tuple_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0109_label.txt b/crates/ra_syntax/test_data/parser/inline/ok/0109_label.rast
index 3376a90cb..3376a90cb 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0109_label.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0109_label.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0110_use_path.txt b/crates/ra_syntax/test_data/parser/inline/ok/0110_use_path.rast
index 7dbcd3927..7dbcd3927 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0110_use_path.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0110_use_path.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0111_tuple_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0111_tuple_pat.rast
index 4680c267e..4680c267e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0111_tuple_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0111_tuple_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0112_bind_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0112_bind_pat.rast
index ad1d47b0e..ad1d47b0e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0112_bind_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0112_bind_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0113_nocontentexpr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0113_nocontentexpr.rast
index 5db1ff2af..5db1ff2af 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0113_nocontentexpr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0113_nocontentexpr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0114_tuple_struct_where.txt b/crates/ra_syntax/test_data/parser/inline/ok/0114_tuple_struct_where.rast
index f5de01405..f5de01405 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0114_tuple_struct_where.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0114_tuple_struct_where.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0115_tuple_field_attrs.txt b/crates/ra_syntax/test_data/parser/inline/ok/0115_tuple_field_attrs.rast
index 8fe15d8e2..8fe15d8e2 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0115_tuple_field_attrs.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0115_tuple_field_attrs.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0117_macro_call_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0117_macro_call_type.rast
index 892dc813a..892dc813a 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0117_macro_call_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0117_macro_call_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0118_impl_inner_attributes.txt b/crates/ra_syntax/test_data/parser/inline/ok/0118_impl_inner_attributes.rast
index 5053ebde7..5053ebde7 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0118_impl_inner_attributes.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0118_impl_inner_attributes.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0118_match_guard.txt b/crates/ra_syntax/test_data/parser/inline/ok/0118_match_guard.rast
index 852e4e489..852e4e489 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0118_match_guard.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0118_match_guard.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0120_match_arms_inner_attribute.txt b/crates/ra_syntax/test_data/parser/inline/ok/0120_match_arms_inner_attribute.rast
index 640e0640f..640e0640f 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0120_match_arms_inner_attribute.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0120_match_arms_inner_attribute.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0121_match_arms_outer_attributes.txt b/crates/ra_syntax/test_data/parser/inline/ok/0121_match_arms_outer_attributes.rast
index ff380b448..ff380b448 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0121_match_arms_outer_attributes.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0121_match_arms_outer_attributes.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0122_generic_lifetime_type_attribute.txt b/crates/ra_syntax/test_data/parser/inline/ok/0122_generic_lifetime_type_attribute.rast
index a73ff9c90..a73ff9c90 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0122_generic_lifetime_type_attribute.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0122_generic_lifetime_type_attribute.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0123_param_list_vararg.txt b/crates/ra_syntax/test_data/parser/inline/ok/0123_param_list_vararg.rast
index 6c3b17868..6c3b17868 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0123_param_list_vararg.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0123_param_list_vararg.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0124_async_fn.txt b/crates/ra_syntax/test_data/parser/inline/ok/0124_async_fn.rast
index 9c4bd7f11..9c4bd7f11 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0124_async_fn.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0124_async_fn.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0125_crate_keyword_path.txt b/crates/ra_syntax/test_data/parser/inline/ok/0125_crate_keyword_path.rast
index 6a9f3bf72..6a9f3bf72 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0125_crate_keyword_path.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0125_crate_keyword_path.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0125_record_literal_field_with_attr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0125_record_literal_field_with_attr.rast
index a36c3df0e..a36c3df0e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0125_record_literal_field_with_attr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0125_record_literal_field_with_attr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0126_attr_on_expr_stmt.txt b/crates/ra_syntax/test_data/parser/inline/ok/0126_attr_on_expr_stmt.rast
index 5c311d18a..5c311d18a 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0126_attr_on_expr_stmt.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0126_attr_on_expr_stmt.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0127_attr_on_last_expr_in_block.txt b/crates/ra_syntax/test_data/parser/inline/ok/0127_attr_on_last_expr_in_block.rast
index 21f49690a..21f49690a 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0127_attr_on_last_expr_in_block.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0127_attr_on_last_expr_in_block.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0128_combined_fns.txt b/crates/ra_syntax/test_data/parser/inline/ok/0128_combined_fns.rast
index 8a972cdb2..8a972cdb2 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0128_combined_fns.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0128_combined_fns.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0129_marco_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0129_marco_pat.rast
index 36d8f4a5f..36d8f4a5f 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0129_marco_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0129_marco_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0130_let_stmt.txt b/crates/ra_syntax/test_data/parser/inline/ok/0130_let_stmt.rast
index 17739dfbd..17739dfbd 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0130_let_stmt.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0130_let_stmt.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0130_try_block_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0130_try_block_expr.rast
index d6df1aba2..d6df1aba2 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0130_try_block_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0130_try_block_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0131_existential_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0131_existential_type.rast
index 6bfac985a..6bfac985a 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0131_existential_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0131_existential_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0132_box_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0132_box_expr.rast
index 12294210e..12294210e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0132_box_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0132_box_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0132_default_fn_type.txt b/crates/ra_syntax/test_data/parser/inline/ok/0132_default_fn_type.rast
index e1734224b..e1734224b 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0132_default_fn_type.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0132_default_fn_type.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0134_nocontentexpr_after_item.txt b/crates/ra_syntax/test_data/parser/inline/ok/0134_nocontentexpr_after_item.rast
index 14655d332..14655d332 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0134_nocontentexpr_after_item.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0134_nocontentexpr_after_item.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0137_await_expr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0137_await_expr.rast
index a6ac0dbd8..a6ac0dbd8 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0137_await_expr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0137_await_expr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0138_associated_type_bounds.txt b/crates/ra_syntax/test_data/parser/inline/ok/0138_associated_type_bounds.rast
index d18096b47..d18096b47 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0138_associated_type_bounds.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0138_associated_type_bounds.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0138_expression_after_block.txt b/crates/ra_syntax/test_data/parser/inline/ok/0138_expression_after_block.rast
index df4c04149..df4c04149 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0138_expression_after_block.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0138_expression_after_block.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0138_self_param_outer_attr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0138_self_param_outer_attr.rast
index e627b9746..e627b9746 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0138_self_param_outer_attr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0138_self_param_outer_attr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0139_param_outer_arg.txt b/crates/ra_syntax/test_data/parser/inline/ok/0139_param_outer_arg.rast
index cf202c94b..cf202c94b 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0139_param_outer_arg.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0139_param_outer_arg.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0142_for_range_from.txt b/crates/ra_syntax/test_data/parser/inline/ok/0142_for_range_from.rast
index eec1cba1e..eec1cba1e 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0142_for_range_from.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0142_for_range_from.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0143_box_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0143_box_pat.rast
index 4d2048711..4d2048711 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0143_box_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0143_box_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0144_dot_dot_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0144_dot_dot_pat.rast
index 325b1bd08..325b1bd08 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0144_dot_dot_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0144_dot_dot_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0145_record_field_pat.txt b/crates/ra_syntax/test_data/parser/inline/ok/0145_record_field_pat.rast
index 06fbdfabf..06fbdfabf 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0145_record_field_pat.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0145_record_field_pat.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0146_as_precedence.txt b/crates/ra_syntax/test_data/parser/inline/ok/0146_as_precedence.rast
index 9e3767fb7..9e3767fb7 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0146_as_precedence.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0146_as_precedence.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0147_const_param.txt b/crates/ra_syntax/test_data/parser/inline/ok/0147_const_param.rast
index f81de7bac..f81de7bac 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0147_const_param.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0147_const_param.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0147_macro_def.txt b/crates/ra_syntax/test_data/parser/inline/ok/0147_macro_def.rast
index 3556099bd..3556099bd 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0147_macro_def.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0147_macro_def.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0148_pub_macro_def.txt b/crates/ra_syntax/test_data/parser/inline/ok/0148_pub_macro_def.rast
index cfd79d9c2..cfd79d9c2 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0148_pub_macro_def.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0148_pub_macro_def.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0150_array_attrs.txt b/crates/ra_syntax/test_data/parser/inline/ok/0150_array_attrs.rast
index 78e296f88..78e296f88 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0150_array_attrs.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0150_array_attrs.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0150_impl_type_params.txt b/crates/ra_syntax/test_data/parser/inline/ok/0150_impl_type_params.rast
index 2d46eebb3..2d46eebb3 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0150_impl_type_params.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0150_impl_type_params.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0151_trait_alias.txt b/crates/ra_syntax/test_data/parser/inline/ok/0151_trait_alias.rast
index de1536ef0..de1536ef0 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0151_trait_alias.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0151_trait_alias.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0152_arg_with_attr.txt b/crates/ra_syntax/test_data/parser/inline/ok/0152_arg_with_attr.rast
index 8092d7009..8092d7009 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0152_arg_with_attr.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0152_arg_with_attr.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0154_fn_pointer_param_ident_path.txt b/crates/ra_syntax/test_data/parser/inline/ok/0154_fn_pointer_param_ident_path.rast
index cb686854a..cb686854a 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0154_fn_pointer_param_ident_path.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0154_fn_pointer_param_ident_path.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0155_closure_params.txt b/crates/ra_syntax/test_data/parser/inline/ok/0155_closure_params.rast
index 98727ae98..98727ae98 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0155_closure_params.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0155_closure_params.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0156_fn_def_param.txt b/crates/ra_syntax/test_data/parser/inline/ok/0156_fn_def_param.rast
index 103e254a6..103e254a6 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0156_fn_def_param.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0156_fn_def_param.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0156_or_pattern.txt b/crates/ra_syntax/test_data/parser/inline/ok/0156_or_pattern.rast
index 3a196d3c0..3a196d3c0 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0156_or_pattern.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0156_or_pattern.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0157_fn_pointer_unnamed_arg.txt b/crates/ra_syntax/test_data/parser/inline/ok/0157_fn_pointer_unnamed_arg.rast
index 52d8f21a4..52d8f21a4 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0157_fn_pointer_unnamed_arg.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0157_fn_pointer_unnamed_arg.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0157_variant_discriminant.txt b/crates/ra_syntax/test_data/parser/inline/ok/0157_variant_discriminant.rast
index a378dd80b..a378dd80b 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0157_variant_discriminant.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0157_variant_discriminant.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0158_binop_resets_statementness.txt b/crates/ra_syntax/test_data/parser/inline/ok/0158_binop_resets_statementness.rast
index d568a1d45..d568a1d45 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0158_binop_resets_statementness.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0158_binop_resets_statementness.rast
diff --git a/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.txt b/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.rast
index ba8779094..ba8779094 100644
--- a/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.txt
+++ b/crates/ra_syntax/test_data/parser/inline/ok/0158_lambda_ret_block.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0000_empty.txt b/crates/ra_syntax/test_data/parser/ok/0000_empty.rast
index 08f5a942f..08f5a942f 100644
--- a/crates/ra_syntax/test_data/parser/ok/0000_empty.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0000_empty.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0001_struct_item.txt b/crates/ra_syntax/test_data/parser/ok/0001_struct_item.rast
index fdc2d6768..fdc2d6768 100644
--- a/crates/ra_syntax/test_data/parser/ok/0001_struct_item.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0001_struct_item.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0002_struct_item_field.txt b/crates/ra_syntax/test_data/parser/ok/0002_struct_item_field.rast
index ef34702fd..ef34702fd 100644
--- a/crates/ra_syntax/test_data/parser/ok/0002_struct_item_field.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0002_struct_item_field.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0004_file_shebang.txt b/crates/ra_syntax/test_data/parser/ok/0004_file_shebang.rast
index e3915c2df..e3915c2df 100644
--- a/crates/ra_syntax/test_data/parser/ok/0004_file_shebang.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0004_file_shebang.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0005_fn_item.txt b/crates/ra_syntax/test_data/parser/ok/0005_fn_item.rast
index 955b789b5..955b789b5 100644
--- a/crates/ra_syntax/test_data/parser/ok/0005_fn_item.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0005_fn_item.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0006_inner_attributes.txt b/crates/ra_syntax/test_data/parser/ok/0006_inner_attributes.rast
index d72b72561..d72b72561 100644
--- a/crates/ra_syntax/test_data/parser/ok/0006_inner_attributes.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0006_inner_attributes.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0007_extern_crate.txt b/crates/ra_syntax/test_data/parser/ok/0007_extern_crate.rast
index 1ffa36c7e..1ffa36c7e 100644
--- a/crates/ra_syntax/test_data/parser/ok/0007_extern_crate.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0007_extern_crate.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0008_mod_item.txt b/crates/ra_syntax/test_data/parser/ok/0008_mod_item.rast
index 061019a73..061019a73 100644
--- a/crates/ra_syntax/test_data/parser/ok/0008_mod_item.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0008_mod_item.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0009_use_item.txt b/crates/ra_syntax/test_data/parser/ok/0009_use_item.rast
index 41db9dbb7..41db9dbb7 100644
--- a/crates/ra_syntax/test_data/parser/ok/0009_use_item.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0009_use_item.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0010_use_path_segments.txt b/crates/ra_syntax/test_data/parser/ok/0010_use_path_segments.rast
index 09871b84d..09871b84d 100644
--- a/crates/ra_syntax/test_data/parser/ok/0010_use_path_segments.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0010_use_path_segments.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0011_outer_attribute.txt b/crates/ra_syntax/test_data/parser/ok/0011_outer_attribute.rast
index f7aa8afe4..f7aa8afe4 100644
--- a/crates/ra_syntax/test_data/parser/ok/0011_outer_attribute.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0011_outer_attribute.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0012_visibility.txt b/crates/ra_syntax/test_data/parser/ok/0012_visibility.rast
index 68e692fd0..68e692fd0 100644
--- a/crates/ra_syntax/test_data/parser/ok/0012_visibility.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0012_visibility.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0013_use_path_self_super.txt b/crates/ra_syntax/test_data/parser/ok/0013_use_path_self_super.rast
index 50730e958..50730e958 100644
--- a/crates/ra_syntax/test_data/parser/ok/0013_use_path_self_super.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0013_use_path_self_super.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0014_use_tree.txt b/crates/ra_syntax/test_data/parser/ok/0014_use_tree.rast
index 3fe34d001..3fe34d001 100644
--- a/crates/ra_syntax/test_data/parser/ok/0014_use_tree.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0014_use_tree.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0015_use_tree.txt b/crates/ra_syntax/test_data/parser/ok/0015_use_tree.rast
index e63f14253..e63f14253 100644
--- a/crates/ra_syntax/test_data/parser/ok/0015_use_tree.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0015_use_tree.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0016_struct_flavors.txt b/crates/ra_syntax/test_data/parser/ok/0016_struct_flavors.rast
index 3fbd14d7b..3fbd14d7b 100644
--- a/crates/ra_syntax/test_data/parser/ok/0016_struct_flavors.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0016_struct_flavors.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0017_attr_trailing_comma.txt b/crates/ra_syntax/test_data/parser/ok/0017_attr_trailing_comma.rast
index 1d65b0d6e..1d65b0d6e 100644
--- a/crates/ra_syntax/test_data/parser/ok/0017_attr_trailing_comma.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0017_attr_trailing_comma.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0018_struct_type_params.txt b/crates/ra_syntax/test_data/parser/ok/0018_struct_type_params.rast
index 1e4e58dd3..1e4e58dd3 100644
--- a/crates/ra_syntax/test_data/parser/ok/0018_struct_type_params.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0018_struct_type_params.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0019_enums.txt b/crates/ra_syntax/test_data/parser/ok/0019_enums.rast
index 9d4a47a51..9d4a47a51 100644
--- a/crates/ra_syntax/test_data/parser/ok/0019_enums.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0019_enums.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0020_type_param_bounds.txt b/crates/ra_syntax/test_data/parser/ok/0020_type_param_bounds.rast
index 18a5fd784..18a5fd784 100644
--- a/crates/ra_syntax/test_data/parser/ok/0020_type_param_bounds.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0020_type_param_bounds.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0021_extern_fn.txt b/crates/ra_syntax/test_data/parser/ok/0021_extern_fn.rast
index 974fb9c44..974fb9c44 100644
--- a/crates/ra_syntax/test_data/parser/ok/0021_extern_fn.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0021_extern_fn.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0022_empty_extern_block.txt b/crates/ra_syntax/test_data/parser/ok/0022_empty_extern_block.rast
index bbbd95fd9..bbbd95fd9 100644
--- a/crates/ra_syntax/test_data/parser/ok/0022_empty_extern_block.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0022_empty_extern_block.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0023_static_items.txt b/crates/ra_syntax/test_data/parser/ok/0023_static_items.rast
index 5591f95eb..5591f95eb 100644
--- a/crates/ra_syntax/test_data/parser/ok/0023_static_items.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0023_static_items.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0024_const_item.txt b/crates/ra_syntax/test_data/parser/ok/0024_const_item.rast
index abe9f851b..abe9f851b 100644
--- a/crates/ra_syntax/test_data/parser/ok/0024_const_item.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0024_const_item.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0025_extern_fn_in_block.txt b/crates/ra_syntax/test_data/parser/ok/0025_extern_fn_in_block.rast
index f5a7a1a5a..f5a7a1a5a 100644
--- a/crates/ra_syntax/test_data/parser/ok/0025_extern_fn_in_block.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0025_extern_fn_in_block.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0026_const_fn_in_block.txt b/crates/ra_syntax/test_data/parser/ok/0026_const_fn_in_block.rast
index f9b1dcf1a..f9b1dcf1a 100644
--- a/crates/ra_syntax/test_data/parser/ok/0026_const_fn_in_block.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0026_const_fn_in_block.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0027_unsafe_fn_in_block.txt b/crates/ra_syntax/test_data/parser/ok/0027_unsafe_fn_in_block.rast
index 9fb7b70a0..9fb7b70a0 100644
--- a/crates/ra_syntax/test_data/parser/ok/0027_unsafe_fn_in_block.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0027_unsafe_fn_in_block.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0028_operator_binding_power.txt b/crates/ra_syntax/test_data/parser/ok/0028_operator_binding_power.rast
index afca1fba2..afca1fba2 100644
--- a/crates/ra_syntax/test_data/parser/ok/0028_operator_binding_power.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0028_operator_binding_power.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0029_range_forms.txt b/crates/ra_syntax/test_data/parser/ok/0029_range_forms.rast
index 95dae4870..95dae4870 100644
--- a/crates/ra_syntax/test_data/parser/ok/0029_range_forms.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0029_range_forms.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0030_string_suffixes.txt b/crates/ra_syntax/test_data/parser/ok/0030_string_suffixes.rast
index cdc9f05ae..cdc9f05ae 100644
--- a/crates/ra_syntax/test_data/parser/ok/0030_string_suffixes.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0030_string_suffixes.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0030_traits.txt b/crates/ra_syntax/test_data/parser/ok/0030_traits.rast
index ac314ae50..ac314ae50 100644
--- a/crates/ra_syntax/test_data/parser/ok/0030_traits.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0030_traits.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0031_extern.txt b/crates/ra_syntax/test_data/parser/ok/0031_extern.rast
index badbf76c5..badbf76c5 100644
--- a/crates/ra_syntax/test_data/parser/ok/0031_extern.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0031_extern.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0032_where_for.txt b/crates/ra_syntax/test_data/parser/ok/0032_where_for.rast
index 3a333480e..3a333480e 100644
--- a/crates/ra_syntax/test_data/parser/ok/0032_where_for.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0032_where_for.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0033_label_break.txt b/crates/ra_syntax/test_data/parser/ok/0033_label_break.rast
index bd9e3fd85..bd9e3fd85 100644
--- a/crates/ra_syntax/test_data/parser/ok/0033_label_break.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0033_label_break.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0034_crate_path_in_call.txt b/crates/ra_syntax/test_data/parser/ok/0034_crate_path_in_call.rast
index fc0d452f4..fc0d452f4 100644
--- a/crates/ra_syntax/test_data/parser/ok/0034_crate_path_in_call.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0034_crate_path_in_call.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0035_weird_exprs.txt b/crates/ra_syntax/test_data/parser/ok/0035_weird_exprs.rast
index 90538b90d..90538b90d 100644
--- a/crates/ra_syntax/test_data/parser/ok/0035_weird_exprs.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0035_weird_exprs.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0036_fully_qualified.txt b/crates/ra_syntax/test_data/parser/ok/0036_fully_qualified.rast
index ac5444087..ac5444087 100644
--- a/crates/ra_syntax/test_data/parser/ok/0036_fully_qualified.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0036_fully_qualified.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0037_mod.txt b/crates/ra_syntax/test_data/parser/ok/0037_mod.rast
index 3af40a104..3af40a104 100644
--- a/crates/ra_syntax/test_data/parser/ok/0037_mod.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0037_mod.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0038_where_pred_type.txt b/crates/ra_syntax/test_data/parser/ok/0038_where_pred_type.rast
index 377367914..377367914 100644
--- a/crates/ra_syntax/test_data/parser/ok/0038_where_pred_type.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0038_where_pred_type.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0039_raw_fn_item.txt b/crates/ra_syntax/test_data/parser/ok/0039_raw_fn_item.rast
index 9936892e9..9936892e9 100644
--- a/crates/ra_syntax/test_data/parser/ok/0039_raw_fn_item.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0039_raw_fn_item.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0040_raw_struct_item_field.txt b/crates/ra_syntax/test_data/parser/ok/0040_raw_struct_item_field.rast
index 05f2c656f..05f2c656f 100644
--- a/crates/ra_syntax/test_data/parser/ok/0040_raw_struct_item_field.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0040_raw_struct_item_field.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0041_raw_keywords.txt b/crates/ra_syntax/test_data/parser/ok/0041_raw_keywords.rast
index 64c70e196..64c70e196 100644
--- a/crates/ra_syntax/test_data/parser/ok/0041_raw_keywords.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0041_raw_keywords.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0042_ufcs_call_list.txt b/crates/ra_syntax/test_data/parser/ok/0042_ufcs_call_list.rast
index 341e02704..341e02704 100644
--- a/crates/ra_syntax/test_data/parser/ok/0042_ufcs_call_list.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0042_ufcs_call_list.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0043_complex_assignment.txt b/crates/ra_syntax/test_data/parser/ok/0043_complex_assignment.rast
index c5821afd0..c5821afd0 100644
--- a/crates/ra_syntax/test_data/parser/ok/0043_complex_assignment.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0043_complex_assignment.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0044_let_attrs.txt b/crates/ra_syntax/test_data/parser/ok/0044_let_attrs.rast
index bfc793dc1..bfc793dc1 100644
--- a/crates/ra_syntax/test_data/parser/ok/0044_let_attrs.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0044_let_attrs.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0045_block_inner_attrs.txt b/crates/ra_syntax/test_data/parser/ok/0045_block_inner_attrs.rast
index e15447ca7..e15447ca7 100644
--- a/crates/ra_syntax/test_data/parser/ok/0045_block_inner_attrs.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0045_block_inner_attrs.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0046_extern_inner_attributes.txt b/crates/ra_syntax/test_data/parser/ok/0046_extern_inner_attributes.rast
index 8f192124b..8f192124b 100644
--- a/crates/ra_syntax/test_data/parser/ok/0046_extern_inner_attributes.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0046_extern_inner_attributes.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0047_minus_in_inner_pattern.txt b/crates/ra_syntax/test_data/parser/ok/0047_minus_in_inner_pattern.rast
index 07a5fbf2d..07a5fbf2d 100644
--- a/crates/ra_syntax/test_data/parser/ok/0047_minus_in_inner_pattern.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0047_minus_in_inner_pattern.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0048_compound_assignment.txt b/crates/ra_syntax/test_data/parser/ok/0048_compound_assignment.rast
index c9cf84ffd..c9cf84ffd 100644
--- a/crates/ra_syntax/test_data/parser/ok/0048_compound_assignment.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0048_compound_assignment.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0049_async_block.txt b/crates/ra_syntax/test_data/parser/ok/0049_async_block.rast
index aa6daff7d..aa6daff7d 100644
--- a/crates/ra_syntax/test_data/parser/ok/0049_async_block.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0049_async_block.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0050_async_block_as_argument.txt b/crates/ra_syntax/test_data/parser/ok/0050_async_block_as_argument.rast
index 435f27970..435f27970 100644
--- a/crates/ra_syntax/test_data/parser/ok/0050_async_block_as_argument.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0050_async_block_as_argument.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0051_parameter_attrs.txt b/crates/ra_syntax/test_data/parser/ok/0051_parameter_attrs.rast
index 254eafc36..254eafc36 100644
--- a/crates/ra_syntax/test_data/parser/ok/0051_parameter_attrs.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0051_parameter_attrs.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0052_for_range_block.txt b/crates/ra_syntax/test_data/parser/ok/0052_for_range_block.rast
index 374c58670..374c58670 100644
--- a/crates/ra_syntax/test_data/parser/ok/0052_for_range_block.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0052_for_range_block.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0053_outer_attribute_on_macro_rules.txt b/crates/ra_syntax/test_data/parser/ok/0053_outer_attribute_on_macro_rules.rast
index 04ff0e2ff..04ff0e2ff 100644
--- a/crates/ra_syntax/test_data/parser/ok/0053_outer_attribute_on_macro_rules.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0053_outer_attribute_on_macro_rules.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0054_qual_path_in_type_arg.txt b/crates/ra_syntax/test_data/parser/ok/0054_qual_path_in_type_arg.rast
index 7e1af254c..7e1af254c 100644
--- a/crates/ra_syntax/test_data/parser/ok/0054_qual_path_in_type_arg.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0054_qual_path_in_type_arg.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0055_dot_dot_dot.txt b/crates/ra_syntax/test_data/parser/ok/0055_dot_dot_dot.rast
index d656e74b1..d656e74b1 100644
--- a/crates/ra_syntax/test_data/parser/ok/0055_dot_dot_dot.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0055_dot_dot_dot.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0056_neq_in_type.txt b/crates/ra_syntax/test_data/parser/ok/0056_neq_in_type.rast
index 4a4ad84ca..4a4ad84ca 100644
--- a/crates/ra_syntax/test_data/parser/ok/0056_neq_in_type.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0056_neq_in_type.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0057_loop_in_call.txt b/crates/ra_syntax/test_data/parser/ok/0057_loop_in_call.rast
index cc8c3f7ec..cc8c3f7ec 100644
--- a/crates/ra_syntax/test_data/parser/ok/0057_loop_in_call.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0057_loop_in_call.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0058_unary_expr_precedence.txt b/crates/ra_syntax/test_data/parser/ok/0058_unary_expr_precedence.rast
index d30cb63ff..d30cb63ff 100644
--- a/crates/ra_syntax/test_data/parser/ok/0058_unary_expr_precedence.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0058_unary_expr_precedence.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0059_loops_in_parens.txt b/crates/ra_syntax/test_data/parser/ok/0059_loops_in_parens.rast
index c011187ea..c011187ea 100644
--- a/crates/ra_syntax/test_data/parser/ok/0059_loops_in_parens.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0059_loops_in_parens.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0060_as_range.txt b/crates/ra_syntax/test_data/parser/ok/0060_as_range.rast
index ad0c4a3fe..ad0c4a3fe 100644
--- a/crates/ra_syntax/test_data/parser/ok/0060_as_range.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0060_as_range.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0061_match_full_range.txt b/crates/ra_syntax/test_data/parser/ok/0061_match_full_range.rast
index bdfac9b76..bdfac9b76 100644
--- a/crates/ra_syntax/test_data/parser/ok/0061_match_full_range.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0061_match_full_range.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0062_macro_2.0.txt b/crates/ra_syntax/test_data/parser/ok/0062_macro_2.0.rast
index 2be523fc3..2be523fc3 100644
--- a/crates/ra_syntax/test_data/parser/ok/0062_macro_2.0.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0062_macro_2.0.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0063_trait_fn_patterns.txt b/crates/ra_syntax/test_data/parser/ok/0063_trait_fn_patterns.rast
index eb2e3a503..eb2e3a503 100644
--- a/crates/ra_syntax/test_data/parser/ok/0063_trait_fn_patterns.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0063_trait_fn_patterns.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0063_variadic_fun.txt b/crates/ra_syntax/test_data/parser/ok/0063_variadic_fun.rast
index 186f03626..186f03626 100644
--- a/crates/ra_syntax/test_data/parser/ok/0063_variadic_fun.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0063_variadic_fun.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0064_impl_fn_params.txt b/crates/ra_syntax/test_data/parser/ok/0064_impl_fn_params.rast
index b30030de3..b30030de3 100644
--- a/crates/ra_syntax/test_data/parser/ok/0064_impl_fn_params.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0064_impl_fn_params.rast
diff --git a/crates/ra_syntax/test_data/parser/ok/0065_comment_newline.txt b/crates/ra_syntax/test_data/parser/ok/0065_comment_newline.rast
index 91d0c3736..91d0c3736 100644
--- a/crates/ra_syntax/test_data/parser/ok/0065_comment_newline.txt
+++ b/crates/ra_syntax/test_data/parser/ok/0065_comment_newline.rast
diff --git a/crates/rust-analyzer/src/config.rs b/crates/rust-analyzer/src/config.rs
index b6a015790..4734df16a 100644
--- a/crates/rust-analyzer/src/config.rs
+++ b/crates/rust-analyzer/src/config.rs
@@ -131,37 +131,47 @@ impl Config {
         set(value, "/cargo/allFeatures", &mut self.cargo.all_features);
         set(value, "/cargo/features", &mut self.cargo.features);
         set(value, "/cargo/loadOutDirsFromCheck", &mut self.cargo.load_out_dirs_from_check);
-        if let Some(mut args) = get::<Vec<String>>(value, "/rustfmt/overrideCommand") {
-            if !args.is_empty() {
+        match get::<Vec<String>>(value, "/rustfmt/overrideCommand") {
+            Some(mut args) if !args.is_empty() => {
                 let command = args.remove(0);
                 self.rustfmt = RustfmtConfig::CustomCommand {
                     command,
                     args,
                 }
             }
-        } else if let RustfmtConfig::Rustfmt { extra_args } = &mut self.rustfmt {
-            set(value, "/rustfmt/extraArgs", extra_args);
-        }
+            _ => {
+                if let RustfmtConfig::Rustfmt { extra_args } = &mut self.rustfmt {
+                    set(value, "/rustfmt/extraArgs", extra_args);
+                }
+            }
+        };
 
         if let Some(false) = get(value, "/checkOnSave/enable") {
+            // check is disabled
             self.check = None;
         } else {
-            if let Some(mut args) = get::<Vec<String>>(value, "/checkOnSave/overrideCommand") {
-                if !args.is_empty() {
+            // check is enabled
+            match get::<Vec<String>>(value, "/checkOnSave/overrideCommand") {
+                // first see if the user has completely overridden the command
+                Some(mut args) if !args.is_empty() => {
                     let command = args.remove(0);
                     self.check = Some(FlycheckConfig::CustomCommand {
                         command,
                         args,
                     });
                 }
-
-            } else if let Some(FlycheckConfig::CargoCommand { command, extra_args, all_targets }) = &mut self.check
-            {
-                set(value, "/checkOnSave/extraArgs", extra_args);
-                set(value, "/checkOnSave/command", command);
-                set(value, "/checkOnSave/allTargets", all_targets);
-            }
-        };
+                // otherwise configure command customizations
+                _ => {
+                    if let Some(FlycheckConfig::CargoCommand { command, extra_args, all_targets })
+                        = &mut self.check
+                    {
+                        set(value, "/checkOnSave/extraArgs", extra_args);
+                        set(value, "/checkOnSave/command", command);
+                        set(value, "/checkOnSave/allTargets", all_targets);
+                    }
+                }
+            };
+        }
 
         set(value, "/inlayHints/typeHints", &mut self.inlay_hints.type_hints);
         set(value, "/inlayHints/parameterHints", &mut self.inlay_hints.parameter_hints);
diff --git a/crates/rust-analyzer/src/lib.rs b/crates/rust-analyzer/src/lib.rs
index 02953be30..036bf62a7 100644
--- a/crates/rust-analyzer/src/lib.rs
+++ b/crates/rust-analyzer/src/lib.rs
@@ -13,17 +13,8 @@
 pub mod cli;
 
 #[allow(unused)]
-macro_rules! println {
-    ($($tt:tt)*) => {
-        compile_error!("stdout is locked, use eprintln")
-    };
-}
-
-#[allow(unused)]
-macro_rules! print {
-    ($($tt:tt)*) => {
-        compile_error!("stdout is locked, use eprint")
-    };
+macro_rules! eprintln {
+    ($($tt:tt)*) => { stdx::eprintln!($($tt)*) };
 }
 
 mod vfs_glob;
diff --git a/crates/stdx/src/lib.rs b/crates/stdx/src/lib.rs
index d2efa2236..401a568bd 100644
--- a/crates/stdx/src/lib.rs
+++ b/crates/stdx/src/lib.rs
@@ -2,6 +2,21 @@
 
 use std::{cell::Cell, fmt};
 
+#[inline(always)]
+pub fn is_ci() -> bool {
+    option_env!("CI").is_some()
+}
+
+#[macro_export]
+macro_rules! eprintln {
+    ($($tt:tt)*) => {{
+        if $crate::is_ci() {
+            panic!("Forgot to remove debug-print?")
+        }
+        std::eprintln!($($tt)*)
+    }}
+}
+
 /// Appends formatted string to a `String`.
 #[macro_export]
 macro_rules! format_to {
diff --git a/crates/test_utils/src/lib.rs b/crates/test_utils/src/lib.rs
index db03df1c4..4164bfd5e 100644
--- a/crates/test_utils/src/lib.rs
+++ b/crates/test_utils/src/lib.rs
@@ -302,42 +302,40 @@ pub fn find_mismatch<'a>(expected: &'a Value, actual: &'a Value) -> Option<(&'a
     }
 }
 
-/// Calls callback `f` with input code and file paths of all `.rs` files from `test_data_dir`
+/// Calls callback `f` with input code and file paths for each `.rs` file in `test_data_dir`
 /// subdirectories defined by `paths`.
 ///
-/// If the content of the matching `.txt` file differs from the output of `f()`
+/// If the content of the matching output file differs from the output of `f()`
 /// the test will fail.
 ///
-/// If there is no matching `.txt` file it will be created and filled with the
+/// If there is no matching output file it will be created and filled with the
 /// output of `f()`, but the test will fail.
-pub fn dir_tests<F>(test_data_dir: &Path, paths: &[&str], f: F)
+pub fn dir_tests<F>(test_data_dir: &Path, paths: &[&str], outfile_extension: &str, f: F)
 where
     F: Fn(&str, &Path) -> String,
 {
-    for (path, input_code) in collect_tests(test_data_dir, paths) {
-        let parse_tree = f(&input_code, &path);
-        let path = path.with_extension("txt");
+    for (path, input_code) in collect_rust_files(test_data_dir, paths) {
+        let actual = f(&input_code, &path);
+        let path = path.with_extension(outfile_extension);
         if !path.exists() {
             println!("\nfile: {}", path.display());
             println!("No .txt file with expected result, creating...\n");
-            println!("{}\n{}", input_code, parse_tree);
-            fs::write(&path, &parse_tree).unwrap();
-            panic!("No expected result")
+            println!("{}\n{}", input_code, actual);
+            fs::write(&path, &actual).unwrap();
+            panic!("No expected result");
         }
         let expected = read_text(&path);
-        let expected = expected.as_str();
-        let parse_tree = parse_tree.as_str();
-        assert_equal_text(expected, parse_tree, &path);
+        assert_equal_text(&expected, &actual, &path);
     }
 }
 
-/// Collects all `.rs` files from `test_data_dir` subdirectories defined by `paths`.
-pub fn collect_tests(test_data_dir: &Path, paths: &[&str]) -> Vec<(PathBuf, String)> {
+/// Collects all `.rs` files from `dir` subdirectories defined by `paths`.
+pub fn collect_rust_files(root_dir: &Path, paths: &[&str]) -> Vec<(PathBuf, String)> {
     paths
         .iter()
         .flat_map(|path| {
-            let path = test_data_dir.to_owned().join(path);
-            test_from_dir(&path).into_iter()
+            let path = root_dir.to_owned().join(path);
+            rust_files_in_dir(&path).into_iter()
         })
         .map(|path| {
             let text = read_text(&path);
@@ -347,7 +345,7 @@ pub fn collect_tests(test_data_dir: &Path, paths: &[&str]) -> Vec<(PathBuf, Stri
 }
 
 /// Collects paths to all `.rs` files from `dir` in a sorted `Vec<PathBuf>`.
-fn test_from_dir(dir: &Path) -> Vec<PathBuf> {
+fn rust_files_in_dir(dir: &Path) -> Vec<PathBuf> {
     let mut acc = Vec::new();
     for file in fs::read_dir(&dir).unwrap() {
         let file = file.unwrap();
diff --git a/editors/code/package.json b/editors/code/package.json
index 60ca0c69c..8ae8ea414 100644
--- a/editors/code/package.json
+++ b/editors/code/package.json
@@ -251,11 +251,15 @@
                     "description": "Additional arguments to rustfmt"
                 },
                 "rust-analyzer.rustfmt.overrideCommand": {
-                    "type": "array",
+                    "type": [
+                        "null",
+                        "array"
+                    ],
                     "items": {
-                        "type": "string"
+                        "type": "string",
+                        "minItems": 1
                     },
-                    "default": [],
+                    "default": null,
                     "markdownDescription": "Advanced option, fully override the command rust-analyzer uses for formatting."
                 },
                 "rust-analyzer.checkOnSave.enable": {
@@ -277,11 +281,15 @@
                     "markdownDescription": "Cargo command to use for `cargo check`"
                 },
                 "rust-analyzer.checkOnSave.overrideCommand": {
-                    "type": "array",
+                    "type": [
+                        "null",
+                        "array"
+                    ],
                     "items": {
-                        "type": "string"
+                        "type": "string",
+                        "minItems": 1
                     },
-                    "default": [],
+                    "default": null,
                     "markdownDescription": "Advanced option, fully override the command rust-analyzer uses for checking. The command should include `--message=format=json` or similar option."
                 },
                 "rust-analyzer.checkOnSave.allTargets": {
diff --git a/xtask/src/lib.rs b/xtask/src/lib.rs
index 4f01f84fb..0b8243f62 100644
--- a/xtask/src/lib.rs
+++ b/xtask/src/lib.rs
@@ -172,8 +172,8 @@ pub fn run_pre_cache() -> Result<()> {
 pub fn run_release(dry_run: bool) -> Result<()> {
     if !dry_run {
         run!("git switch release")?;
-        run!("git fetch upstream")?;
-        run!("git reset --hard upstream/master")?;
+        run!("git fetch upstream --tags --force")?;
+        run!("git reset --hard tags/nightly")?;
         run!("git push")?;
     }