mirror of https://github.com/rust-lang/rust
29 lines
585 B
Rust
29 lines
585 B
Rust
#![feature(const_mut_refs)]
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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 equate<T>(x: T, y: T){}
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fn foo<'a>() {
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let y = ();
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equate(InvariantRef::new(&y), const { InvariantRef::<'a>::NEW });
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//~^ ERROR `y` does not live long enough [E0597]
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}
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fn main() {
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foo();
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}
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