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Improve the wording for the can't reassign error

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This commit is contained in:
Yuki Okushi 2021-03-13 05:56:30 +09:00
parent b3e19a221e
commit 0466b6ac6d
2 changed files with 8 additions and 1 deletions
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3
compiler/rustc_parse/src/parser/stmt.rs
View File

@ -291,7 +291,7 @@ impl<'a> Parser<'a> {
Ok(P(ast::Local { ty, pat, init, id: DUMMY_NODE_ID, span: lo.to(hi), attrs, tokens: None }))
}
/// Parses the RHS of a local variable declaration (e.g., '= 14;').
/// Parses the RHS of a local variable declaration (e.g., `= 14;`).
fn parse_initializer(&mut self, eq_optional: bool) -> PResult<'a, Option<P<Expr>>> {
let eq_consumed = match self.token.kind {
token::BinOpEq(..) => {
@ -306,6 +306,7 @@ impl<'a> Parser<'a> {
"=".to_string(),
Applicability::MaybeIncorrect,
)
.help("if you meant to overwrite, remove the `let` binding")
.emit();
self.bump();
true

6
src/test/ui/parser/let-binop.stderr
View File

@ -3,18 +3,24 @@ error: can't reassign to an uninitialized variable
|
LL | let a: i8 *= 1;
| ^^ help: initialize the variable
|
= help: if you meant to overwrite, remove the `let` binding
error: can't reassign to an uninitialized variable
--> $DIR/let-binop.rs:6:11
|
LL | let b += 1;
| ^^ help: initialize the variable
|
= help: if you meant to overwrite, remove the `let` binding
error: can't reassign to an uninitialized variable
--> $DIR/let-binop.rs:8:11
|
LL | let c *= 1;
| ^^ help: initialize the variable
|
= help: if you meant to overwrite, remove the `let` binding
error: aborting due to 3 previous errors