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Add comment about RTN feature gating

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Nilstrieb 2023-09-24 10:47:31 +02:00
parent 073feb5e69
commit 845a027ddb
1 changed files with 3 additions and 0 deletions
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compiler/rustc_ast_passes/src/feature_gate.rs
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@ -592,6 +592,9 @@ macro_rules! gate_all_legacy_dont_use {
gate_all_legacy_dont_use!(trait_alias, "trait aliases are experimental");
gate_all_legacy_dont_use!(associated_type_bounds, "associated type bounds are unstable");
// Despite being a new feature, `where T: Trait<Assoc(): Sized>`, which is RTN syntax now,
// used to be gated under associated_type_bounds, which are right above, so RTN needs to
// be too.
gate_all_legacy_dont_use!(return_type_notation, "return type notation is experimental");
gate_all_legacy_dont_use!(decl_macro, "`macro` is experimental");
gate_all_legacy_dont_use!(box_patterns, "box pattern syntax is experimental");