rust/compiler/rustc_ast_lowering
许杰友 Jieyou Xu (Joe) 8eb2e5f4c8
Rollup merge of #125293 - dingxiangfei2009:tail-expr-temp-lifetime, r=estebank,davidtwco
Place tail expression behind terminating scope

This PR implements #123739 so that we can do further experiments in nightly.

A little rewrite has been applied to `for await` lowering. It was previously `unsafe { Pin::unchecked_new(into_async_iter(..)) }`. Under the edition 2024 rule, however, `into_async_iter` gets dropped at the end of the `unsafe` block. This presumably the first Edition 2024 migration rule goes by hoisting `into_async_iter(..)` into `match` one level above, so it now looks like the following.
```rust
match into_async_iter($iter_expr) {
  ref mut iter => match unsafe { Pin::unchecked_new(iter) } {
    ...
  }
}
```
2024-06-19 01:51:38 +01:00
..
src Rollup merge of #125293 - dingxiangfei2009:tail-expr-temp-lifetime, r=estebank,davidtwco 2024-06-19 01:51:38 +01:00
Cargo.toml Clean up rustc_*/Cargo.toml. 2023-10-30 08:46:02 +11:00
messages.ftl Add tests for illegal use bound syntax 2024-06-17 22:35:25 -04:00