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| author | bors <bors@rust-lang.org> | 2022-09-14 18:10:51 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2022-09-14 18:10:51 +0000 |
| commit | 6153d3cbe6abc74fb37e4ebe48cc825484fd6bbf (patch) | |
| tree | bef7759236490fe278aa160a8ac63f41d37ecd27 /compiler/rustc_feature/src | |
| parent | a92669638461836f41f54f95e396f9082bb91391 (diff) | |
| parent | 0faafbf1d91f7b9ea4c775cd33cf12008575a35b (diff) | |
| download | rust-6153d3cbe6abc74fb37e4ebe48cc825484fd6bbf.tar.gz rust-6153d3cbe6abc74fb37e4ebe48cc825484fd6bbf.zip | |
Auto merge of #101212 - eholk:dyn-star, r=compiler-errors
Initial implementation of dyn* This PR adds extremely basic and incomplete support for [dyn*](https://smallcultfollowing.com/babysteps//blog/2022/03/29/dyn-can-we-make-dyn-sized/). The goal is to get something in tree behind a flag to make collaboration easier, and also to make sure the implementation so far is not unreasonable. This PR does quite a few things: * Introduce `dyn_star` feature flag * Adds parsing for `dyn* Trait` types * Defines `dyn* Trait` as a sized type * Adds support for explicit casts, like `42usize as dyn* Debug` * Including const evaluation of such casts * Adds codegen for drop glue so things are cleaned up properly when a `dyn* Trait` object goes out of scope * Adds codegen for method calls, at least for methods that take `&self` Quite a bit is still missing, but this gives us a starting point. Note that this is never intended to become stable surface syntax for Rust, but rather `dyn*` is planned to be used as an implementation detail for async functions in dyn traits. Joint work with `@nikomatsakis` and `@compiler-errors.` r? `@bjorn3`
Diffstat (limited to 'compiler/rustc_feature/src')
| -rw-r--r-- | compiler/rustc_feature/src/active.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/rustc_feature/src/active.rs b/compiler/rustc_feature/src/active.rs index d9f9416a345..c28fa654a6c 100644 --- a/compiler/rustc_feature/src/active.rs +++ b/compiler/rustc_feature/src/active.rs @@ -384,6 +384,8 @@ declare_features! ( (active, doc_cfg_hide, "1.57.0", Some(43781), None), /// Allows `#[doc(masked)]`. (active, doc_masked, "1.21.0", Some(44027), None), + /// Allows `dyn* Trait` objects. + (incomplete, dyn_star, "CURRENT_RUSTC_VERSION", Some(91611), None), /// Allows `X..Y` patterns. (active, exclusive_range_pattern, "1.11.0", Some(37854), None), /// Allows exhaustive pattern matching on types that contain uninhabited types. |