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Properly handle async blocks and fns in if exprs without else

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When encountering a tail expression in the then arm of an `if` expression
without an `else` arm, account for `async fn` and `async` blocks to
suggest `return`ing the value and pointing at the return type of the
`async fn`.

We now also account for AFIT when looking for the return type to point at.

Fix #115405.
This commit is contained in:
Esteban Küber 2024-02-06 03:30:16 +00:00
parent bdc15928c8
commit 37d2ea2fa0
12 changed files with 250 additions and 61 deletions
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2
compiler/rustc_middle/src/hir/map/mod.rs
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@ -617,7 +617,7 @@ impl<'hir> Map<'hir> {
Node::Item(_)
| Node::ForeignItem(_)
| Node::TraitItem(_)
| Node::Expr(Expr { kind: ExprKind::Closure { .. }, .. })
| Node::Expr(Expr { kind: ExprKind::Closure(_), .. })
| Node::ImplItem(_)
// The input node `id` must be enclosed in the method's body as opposed
// to some other place such as its return type (fixes #114918).