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rust/src/test/ui/rfc-2632-const-trait-impl/std-impl-gate.rs

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2021-08-16 15:55:35 +00:00
// This tests feature gates for const impls in the standard library.
// revisions: stock gated
//[gated] run-pass
#![cfg_attr(gated, feature(const_trait_impl, const_default_impls))]
fn non_const_context() -> Vec<usize> {
Default::default()
}
const fn const_context() -> Vec<usize> {
Default::default()
//[stock]~^ ERROR calls in constant functions are limited
}
fn main() {
const VAL: Vec<usize> = const_context();
assert_eq!(VAL, non_const_context());
}