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Syntatically accept become expressions

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Maybe Waffle 2022-11-16 18:36:17 +00:00
parent 8d1fa473dd
commit d7713feb99
14 changed files with 71 additions and 2 deletions
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compiler/rustc_ast_passes/src/feature_gate.rs
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@ -555,6 +555,7 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session) {
gate_all!(dyn_star, "`dyn*` trait objects are experimental");
gate_all!(const_closures, "const closures are experimental");
gate_all!(builtin_syntax, "`builtin #` syntax is unstable");
gate_all!(explicit_tail_calls, "`become` expression is experimental");
if !visitor.features.negative_bounds {
for &span in spans.get(&sym::negative_bounds).iter().copied().flatten() {