mirror of https://github.com/rust-lang/rust
31 lines
842 B
Rust
31 lines
842 B
Rust
//@ known-bug: #110395
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// FIXME check-pass
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// This is a non-regression test for const-qualification of unstable items in libcore
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// as explained in issue #67053.
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// const-qualification could miss some `const fn`s if they were unstable and the feature
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// gate was not enabled in libcore.
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#![stable(feature = "core", since = "1.6.0")]
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#![feature(staged_api, const_trait_impl)]
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enum Opt<T> {
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Some(T),
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None,
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}
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impl<T> Opt<T> {
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#[rustc_const_unstable(feature = "foo", issue = "none")]
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#[stable(feature = "rust1", since = "1.0.0")]
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const fn unwrap_or_else<F: ~const FnOnce() -> T>(self, f: F) -> T {
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//FIXME ~^ ERROR destructor of
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//FIXME ~| ERROR destructor of
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match self {
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Opt::Some(t) => t,
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Opt::None => f(),
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//FIXME ~^ ERROR cannot call
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}
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}
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}
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fn main() {}
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