mirror of https://github.com/rust-lang/rust
35 lines
744 B
Rust
35 lines
744 B
Rust
//@ run-pass
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#![feature(const_mut_refs)]
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use std::marker::PhantomData;
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// rust-lang/rust#78174: ICE: "cannot convert ReErased to a region vid"
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fn issue_78174() {
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let foo = const { "foo" };
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assert_eq!(foo, "foo");
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}
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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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fn get_invariant_ref<'a>() -> InvariantRef<'a, ()> {
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const { InvariantRef::<'a, ()>::new(&()) }
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}
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fn get_invariant_ref2<'a>() -> InvariantRef<'a, ()> {
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// Try some type inference
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const { InvariantRef::new(&()) }
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}
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fn main() {
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issue_78174();
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get_invariant_ref();
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get_invariant_ref2();
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}
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