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Don't emit two type mismatches for literal pattern mismatches

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This commit is contained in:
Lukas Wirth 2023-03-03 10:41:09 +01:00
parent ec273c3d12
commit 44e2c6ea92
2 changed files with 9 additions and 13 deletions
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11
crates/hir-ty/src/infer/pat.rs
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@ -181,8 +181,8 @@ impl<'a> InferenceContext<'a> {
.intern(Interner)
}
pub(super) fn infer_top_pat(&mut self, pat: PatId, expected: &Ty) -> Ty {
self.infer_pat(pat, expected, BindingMode::default())
pub(super) fn infer_top_pat(&mut self, pat: PatId, expected: &Ty) {
self.infer_pat(pat, expected, BindingMode::default());
}
fn infer_pat(&mut self, pat: PatId, expected: &Ty, mut default_bm: BindingMode) -> Ty {
@ -260,7 +260,12 @@ impl<'a> InferenceContext<'a> {
let start_ty = self.infer_expr(*start, &Expectation::has_type(expected.clone()));
self.infer_expr(*end, &Expectation::has_type(start_ty))
}
&Pat::Lit(expr) => self.infer_lit_pat(expr, &expected),
&Pat::Lit(expr) => {
// Don't emit type mismatches again, the expression lowering already did that.
let ty = self.infer_lit_pat(expr, &expected);
self.write_pat_ty(pat, ty.clone());
return ty;
}
Pat::Box { inner } => match self.resolve_boxed_box() {
Some(box_adt) => {
let (inner_ty, alloc_ty) = match expected.as_adt() {