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// run-pass
#![allow(incomplete_features)]
#![feature(const_mut_refs)]
#![feature(inline_const)]
#![feature(inline_const_pat)]
use std::marker::PhantomData;
// rust-lang/rust#78174: ICE: "cannot convert ReErased to a region vid"
fn issue_78174() {
match "foo" {
const { concat!("fo", "o") } => (),
_ => unreachable!(),
}
}
#[derive(PartialEq, Eq)]
pub struct InvariantRef<'a, T: ?Sized>(&'a T, PhantomData<&'a mut &'a T>);
impl<'a, T: ?Sized> InvariantRef<'a, T> {
pub const fn new(r: &'a T) -> Self {
InvariantRef(r, PhantomData)
}
}
fn match_invariant_ref<'a>() {
match const { InvariantRef::<'a, _>::new(&()) } {
const { InvariantRef::<'a, ()>::new(&()) } => {
}
}
}
fn main() {
issue_78174();
match_invariant_ref();
}
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