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//@ known-bug: #110395
// FIXME check-pass
// 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 {
//FIXME ~^ ERROR destructor of
//FIXME ~| ERROR destructor of
match self {
Opt::Some(t) => t,
Opt::None => f(),
//FIXME ~^ ERROR cannot call
}
}
}
fn main() {}
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