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infer: update resolver when descending into block

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This commit is contained in:
Jonas Schievink 2021-02-10 14:41:54 +01:00
parent 82a1b91f20
commit e837df8479
2 changed files with 39 additions and 16 deletions
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36
crates/hir_ty/src/infer/expr.rs
View File

@ -137,24 +137,28 @@ fn infer_expr_inner(&mut self, tgt_expr: ExprId, expected: &Expectation) -> Ty {
self.coerce_merge_branch(&then_ty, &else_ty)
}
Expr::Block { statements, tail, label, id: _ } => match label {
Some(_) => {
let break_ty = self.table.new_type_var();
self.breakables.push(BreakableContext {
may_break: false,
break_ty: break_ty.clone(),
label: label.map(|label| self.body[label].name.clone()),
});
let ty = self.infer_block(statements, *tail, &Expectation::has_type(break_ty));
let ctxt = self.breakables.pop().expect("breakable stack broken");
if ctxt.may_break {
ctxt.break_ty
} else {
ty
Expr::Block { statements, tail, label, id: _ } => {
self.resolver = resolver_for_expr(self.db.upcast(), self.owner, tgt_expr);
match label {
Some(_) => {
let break_ty = self.table.new_type_var();
self.breakables.push(BreakableContext {
may_break: false,
break_ty: break_ty.clone(),
label: label.map(|label| self.body[label].name.clone()),
});
let ty =
self.infer_block(statements, *tail, &Expectation::has_type(break_ty));
let ctxt = self.breakables.pop().expect("breakable stack broken");
if ctxt.may_break {
ctxt.break_ty
} else {
ty
}
}
None => self.infer_block(statements, *tail, expected),
}
None => self.infer_block(statements, *tail, expected),
},
}
Expr::Unsafe { body } | Expr::Const { body } => self.infer_expr(*body, expected),
Expr::TryBlock { body } => {
let _inner = self.infer_expr(*body, expected);

19
crates/hir_ty/src/tests/simple.rs
View File

@ -2415,3 +2415,22 @@ fn foo<const FOO: usize>() {
"#]],
);
}
#[test]
fn infer_inner_type() {
check_infer(r#"
fn foo() {
struct S { field: u32 }
let s = S { field: 0 };
let f = s.field;
}
"#, expect![[r#"
9..89 '{ ...eld; }': ()
47..48 's': S
51..65 'S { field: 0 }': S
62..63 '0': u32
75..76 'f': u32
79..80 's': S
79..86 's.field': u32
"#]]);
}