diff options
| -rw-r--r-- | compiler/rustc_ast_passes/src/feature_gate.rs | 1 | ||||
| -rw-r--r-- | compiler/rustc_parse/src/parser/item.rs | 7 | ||||
| -rw-r--r-- | tests/ui/auto-traits/pre-cfg.rs | 8 | ||||
| -rw-r--r-- | tests/ui/auto-traits/pre-cfg.stderr | 13 | ||||
| -rw-r--r-- | tests/ui/macros/stringify.rs | 1 |
5 files changed, 29 insertions, 1 deletions
diff --git a/compiler/rustc_ast_passes/src/feature_gate.rs b/compiler/rustc_ast_passes/src/feature_gate.rs index 62dc7ae58a2..5d279943f1e 100644 --- a/compiler/rustc_ast_passes/src/feature_gate.rs +++ b/compiler/rustc_ast_passes/src/feature_gate.rs @@ -603,6 +603,7 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) { "exclusive range pattern syntax is experimental" ); gate_all_legacy_dont_use!(try_blocks, "`try` blocks are unstable"); + gate_all_legacy_dont_use!(auto_traits, "`auto` traits are unstable"); visit::walk_crate(&mut visitor, krate); } diff --git a/compiler/rustc_parse/src/parser/item.rs b/compiler/rustc_parse/src/parser/item.rs index aad4edaba90..cc54cc5bebb 100644 --- a/compiler/rustc_parse/src/parser/item.rs +++ b/compiler/rustc_parse/src/parser/item.rs @@ -813,7 +813,12 @@ impl<'a> Parser<'a> { fn parse_item_trait(&mut self, attrs: &mut AttrVec, lo: Span) -> PResult<'a, ItemInfo> { let unsafety = self.parse_unsafety(Case::Sensitive); // Parse optional `auto` prefix. - let is_auto = if self.eat_keyword(kw::Auto) { IsAuto::Yes } else { IsAuto::No }; + let is_auto = if self.eat_keyword(kw::Auto) { + self.sess.gated_spans.gate(sym::auto_traits, self.prev_token.span); + IsAuto::Yes + } else { + IsAuto::No + }; self.expect_keyword(kw::Trait)?; let ident = self.parse_ident()?; diff --git a/tests/ui/auto-traits/pre-cfg.rs b/tests/ui/auto-traits/pre-cfg.rs new file mode 100644 index 00000000000..e6e840dcbab --- /dev/null +++ b/tests/ui/auto-traits/pre-cfg.rs @@ -0,0 +1,8 @@ +// check-pass + +#[cfg(FALSE)] +auto trait Foo {} +//~^ WARN `auto` traits are unstable +//~| WARN unstable syntax can change at any point in the future, causing a hard error! + +fn main() {} diff --git a/tests/ui/auto-traits/pre-cfg.stderr b/tests/ui/auto-traits/pre-cfg.stderr new file mode 100644 index 00000000000..6efa05b4326 --- /dev/null +++ b/tests/ui/auto-traits/pre-cfg.stderr @@ -0,0 +1,13 @@ +warning: `auto` traits are unstable + --> $DIR/pre-cfg.rs:4:1 + | +LL | auto trait Foo {} + | ^^^^ + | + = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information + = help: add `#![feature(auto_traits)]` to the crate attributes to enable + = warning: unstable syntax can change at any point in the future, causing a hard error! + = note: for more information, see issue #65860 <https://github.com/rust-lang/rust/issues/65860> + +warning: 1 warning emitted + diff --git a/tests/ui/macros/stringify.rs b/tests/ui/macros/stringify.rs index 816f99baa84..8b4e6250a30 100644 --- a/tests/ui/macros/stringify.rs +++ b/tests/ui/macros/stringify.rs @@ -3,6 +3,7 @@ // compile-flags: --test #![feature(async_closure)] +#![feature(auto_traits)] #![feature(box_patterns)] #![feature(const_trait_impl)] #![feature(decl_macro)] |