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Auto merge of #116447 - oli-obk:gen_fn, r=compiler-errors

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Implement `gen` blocks in the 2024 edition

Coroutines tracking issue https://github.com/rust-lang/rust/issues/43122
`gen` block tracking issue https://github.com/rust-lang/rust/issues/117078

This PR implements `gen` blocks that implement `Iterator`. Most of the logic with `async` blocks is shared, and thus I renamed various types that were referring to `async` specifically.

An example usage of `gen` blocks is

```rust
fn foo() -> impl Iterator<Item = i32> {
    gen {
        yield 42;
        for i in 5..18 {
            if i.is_even() { continue }
            yield i * 2;
        }
    }
}
```

The limitations (to be resolved) of the implementation are listed in the tracking issue
This commit is contained in:
bors 2023-10-29 00:03:52 +00:00
commit 2cad938a81
75 changed files with 1096 additions and 148 deletions
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3
compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
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@ -560,6 +560,9 @@ pub fn push_item_name(tcx: TyCtxt<'_>, def_id: DefId, qualified: bool, output: &
fn coroutine_kind_label(coroutine_kind: Option<CoroutineKind>) -> &'static str {
match coroutine_kind {
Some(CoroutineKind::Gen(CoroutineSource::Block)) => "gen_block",
Some(CoroutineKind::Gen(CoroutineSource::Closure)) => "gen_closure",
Some(CoroutineKind::Gen(CoroutineSource::Fn)) => "gen_fn",
Some(CoroutineKind::Async(CoroutineSource::Block)) => "async_block",
Some(CoroutineKind::Async(CoroutineSource::Closure)) => "async_closure",
Some(CoroutineKind::Async(CoroutineSource::Fn)) => "async_fn",