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rust/compiler/rustc_hir_analysis
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Matthias Krüger c00eac3558
Rollup merge of #104592 - ComputerDruid:async_check, r=compiler-errors 
Ensure async trait impls are async (or otherwise return an opaque type)

As a workaround for the full `#[refine]` semantics not being implemented
yet, forbit returning a concrete future type like `Box<dyn Future>` or a
manually implemented Future.

`-> impl Future` is still permitted; while that can also cause
accidental refinement, that's behind a different feature gate
(`return_position_impl_trait_in_trait`) and that problem exists
regardless of whether the trait method is async, so will have to be
solved more generally.

Fixes https://github.com/rust-lang/rust/issues/102745
2022-12-15 12:46:00 +01:00
..
src Rollup merge of #104592 - ComputerDruid:async_check, r=compiler-errors 2022-12-15 12:46:00 +01:00
Cargo.toml Rewrite representability 2022-10-07 09:33:46 -05:00
README.md rustc_typeck to rustc_hir_analysis 2022-09-27 10:37:23 +02:00

README.md

For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.