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| author | bors <bors@rust-lang.org> | 2024-02-06 15:04:01 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2024-02-06 15:04:01 +0000 |
| commit | 4a2fe4491ea616983a0cf0cbbd145a39768f4e7a (patch) | |
| tree | 3ee31f8af96390f25ff12e1772aa224ba09a4828 /compiler/rustc_ast_lowering/messages.ftl | |
| parent | 037f515caf46846d2bffae55883eebc6c1ccb861 (diff) | |
| parent | ed7fca1f8805b4348b801f23f444e0dda42f7aed (diff) | |
| download | rust-4a2fe4491ea616983a0cf0cbbd145a39768f4e7a.tar.gz rust-4a2fe4491ea616983a0cf0cbbd145a39768f4e7a.zip | |
Auto merge of #120361 - compiler-errors:async-closures, r=oli-obk
Rework support for async closures; allow them to return futures that borrow from the closure's captures
This PR implements a new lowering for async closures via `TyKind::CoroutineClosure` which handles the curious relationship between the closure and the coroutine that it returns.
I wrote up a bunch in [this hackmd](https://hackmd.io/`@compiler-errors/S1HvqQxca)` which will be copied to the dev guide after this PR lands, and hopefully left sufficient comments in the source code explaining why this change is as large as it is.
This also necessitates that they begin implementing the `AsyncFn`-family of traits, rather than the `Fn`-family of traits -- if you need `Fn` implementations, you should probably use the non-sugar `|| async {}` syntax instead.
Notably this PR does not yet implement `async Fn()` syntax sugar for bounds, but I expect to add those soon (**edit:** #120392). For now, users must use `AsyncFn()` traits directly, which necessitates adding the `async_fn_traits` feature gate as well. I will add this as a follow-up very soon.
r? oli-obk
This is based on top of #120322, but that PR is minimal.
Diffstat (limited to 'compiler/rustc_ast_lowering/messages.ftl')
| -rw-r--r-- | compiler/rustc_ast_lowering/messages.ftl | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/compiler/rustc_ast_lowering/messages.ftl b/compiler/rustc_ast_lowering/messages.ftl index e0dc227ca4c..37e45379ba9 100644 --- a/compiler/rustc_ast_lowering/messages.ftl +++ b/compiler/rustc_ast_lowering/messages.ftl @@ -123,9 +123,6 @@ ast_lowering_never_pattern_with_guard = a guard on a never pattern will never be run .suggestion = remove this guard -ast_lowering_not_supported_for_lifetime_binder_async_closure = - `for<...>` binders on `async` closures are not currently supported - ast_lowering_previously_used_here = previously used here ast_lowering_register1 = register `{$reg1_name}` |