rust/compiler/rustc_ast_lowering
bors 2cad938a81 Auto merge of #116447 - oli-obk:gen_fn, r=compiler-errors
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
2023-10-29 00:03:52 +00:00
..
src Auto merge of #116447 - oli-obk:gen_fn, r=compiler-errors 2023-10-29 00:03:52 +00:00
Cargo.toml Add rustc_fluent_macro to decouple fluent from rustc_macros 2023-04-18 18:56:22 +00:00
messages.ftl s/generator/coroutine/ 2023-10-20 21:14:01 +00:00