bjoernager/rust
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Introduce ~const

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- [x] Removed `?const` and change uses of `?const`
 - [x] Added `~const` to the AST. It is gated behind const_trait_impl.
 - [x] Validate `~const` in ast_validation.
 - [ ] Add enum `BoundConstness` to the HIR. (With variants `NotConst` and
 `ConstIfConst` allowing future extensions)
 - [ ] Adjust trait selection and pre-existing code to use `BoundConstness`.
 - [ ] Optional steps (*for this PR, obviously*)
      - [ ] Fix #88155
      - [ ] Do something with constness bounds in chalk
This commit is contained in:
Deadbeef 2021-08-25 11:53:16 +00:00
parent d5cd3205fd
commit 8660832086
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GPG key ID: 027DF9338862ADDD
16 changed files with 178 additions and 125 deletions
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3
compiler/rustc_feature/src/active.rs
View file

@ -515,9 +515,6 @@ declare_features! (
/// Allows `impl const Trait for T` syntax.
(active, const_trait_impl, "1.42.0", Some(67792), None),
/// Allows `T: ?const Trait` syntax in bounds.
(incomplete, const_trait_bound_opt_out, "1.42.0", Some(67794), None),
/// Allows the use of `no_sanitize` attribute.
(active, no_sanitize, "1.42.0", Some(39699), None),

3
compiler/rustc_feature/src/removed.rs
View file

@ -123,6 +123,9 @@ declare_features! (
/// Allows overlapping impls of marker traits.
(removed, overlapping_marker_traits, "1.42.0", Some(29864), None,
Some("removed in favor of `#![feature(marker_trait_attr)]`")),
/// Allows `T: ?const Trait` syntax in bounds.
(removed, const_trait_bound_opt_out, "1.42.0", Some(67794), None,
Some("Removed in favor of `~const` bound in #![feature(const_trait_impl)]")),
/// Allows `#[no_debug]`.
(removed, no_debug, "1.43.0", Some(29721), None, Some("removed due to lack of demand")),
/// Allows comparing raw pointers during const eval.