rust/tests/ui/rfc-2632-const-trait-impl/feature-gate.rs

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// revisions: stock gated
// gate-test-const_trait_impl
#![cfg_attr(gated, feature(const_trait_impl))]
#![feature(rustc_attrs)]
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struct S;
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#[const_trait] //[stock]~ ERROR `const_trait` is a temporary placeholder
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trait T {}
impl const T for S {}
//[stock]~^ ERROR const trait impls are experimental
#[rustc_error]
fn main() {} //[gated]~ ERROR fatal error triggered by #[rustc_error]