mirror of https://github.com/rust-lang/rust.git
35 lines
834 B
Rust
35 lines
834 B
Rust
// ignore-test (This is currently broken)
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#![allow(incomplete_features)]
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#![feature(const_mut_refs)]
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#![feature(inline_const_pat)]
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use std::marker::PhantomData;
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#[derive(PartialEq, Eq)]
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pub struct InvariantRef<'a, T: ?Sized>(&'a T, PhantomData<&'a mut &'a T>);
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impl<'a, T: ?Sized> InvariantRef<'a, T> {
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pub const fn new(r: &'a T) -> Self {
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InvariantRef(r, PhantomData)
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}
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}
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impl<'a> InvariantRef<'a, ()> {
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pub const NEW: Self = InvariantRef::new(&());
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}
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fn match_invariant_ref<'a>() {
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let y = ();
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match InvariantRef::new(&y) {
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//~^ ERROR `y` does not live long enough [E0597]
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// FIXME(nbdd0121): This should give the same error as `InvariantRef::<'a>::NEW` (without
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// const block)
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const { InvariantRef::<'a>::NEW } => (),
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}
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}
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fn main() {
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match_invariant_ref();
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}
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