bjoernager/rust
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Detect missing => after match guard during parsing

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```
error: expected one of `,`, `:`, or `}`, found `.`
  --> $DIR/missing-fat-arrow.rs:25:14
   |
LL |         Some(a) if a.value == b {
   |                               - while parsing this struct
LL |             a.value = 1;
   |             -^ expected one of `,`, `:`, or `}`
   |             |
   |             while parsing this struct field
   |
help: try naming a field
   |
LL |             a: a.value = 1;
   |             ++
help: you might have meant to start a match arm after the match guard
   |
LL |         Some(a) if a.value == b => {
   |                                 ++
```

Fix #78585.
This commit is contained in:
Esteban Küber 2023-10-03 21:21:02 +00:00
parent a6dfd89fa7
commit 745c1ea438
13 changed files with 229 additions and 41 deletions
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1
compiler/rustc_parse/src/parser/mod.rs
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@ -52,6 +52,7 @@ bitflags::bitflags! {
const NO_STRUCT_LITERAL = 1 << 1;
const CONST_EXPR = 1 << 2;
const ALLOW_LET = 1 << 3;
const IN_IF_GUARD = 1 << 4;
}
}