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Implement a explicit_generic_args_with_impl_trait feature gate

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When this gate is enabled, explicit generic arguments can be specified even
if `impl Trait` is used in argument position. Generic arguments can only be
specified for explicit generic parameters but not for the synthetic type
parameters from  `impl Trait`
This commit is contained in:
Gary Guo 2021-06-09 20:56:41 +01:00
parent 337181e07d
commit 9b90e7e980
10 changed files with 139 additions and 4 deletions
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3
compiler/rustc_feature/src/active.rs
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@ -687,6 +687,9 @@ declare_features! (
/// Trait upcasting is casting, e.g., `dyn Foo -> dyn Bar` where `Foo: Bar`.
(incomplete, trait_upcasting, "1.56.0", Some(65991), None),
/// Allows explicit generic arguments specification with `impl Trait` present.
(active, explicit_generic_args_with_impl_trait, "1.56.0", Some(83701), None),
// -------------------------------------------------------------------------
// feature-group-end: actual feature gates
// -------------------------------------------------------------------------