rust/tests/ui/consts/unstable-const-fn-in-libcore.rs
2023-01-11 09:32:08 +00:00

28 lines
746 B
Rust

// This is a non-regression test for const-qualification of unstable items in libcore
// as explained in issue #67053.
// const-qualification could miss some `const fn`s if they were unstable and the feature
// gate was not enabled in libcore.
#![stable(feature = "core", since = "1.6.0")]
#![feature(staged_api, const_trait_impl)]
enum Opt<T> {
Some(T),
None,
}
impl<T> Opt<T> {
#[rustc_const_unstable(feature = "foo", issue = "none")]
#[stable(feature = "rust1", since = "1.0.0")]
const fn unwrap_or_else<F: ~const FnOnce() -> T>(self, f: F) -> T {
//~^ ERROR destructor of
//~| ERROR destructor of
match self {
Opt::Some(t) => t,
Opt::None => f(),
}
}
}
fn main() {}