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Check pointee metadata correctly in ui test

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This commit is contained in:
Michael Goulet 2023-03-30 00:52:58 +00:00
parent f5c78c4d3a
commit 321a5dba9e
2 changed files with 9 additions and 13 deletions
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18
tests/ui/traits/new-solver/pointee.rs
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@ -7,17 +7,15 @@ use std::ptr::{DynMetadata, Pointee};
trait Trait<U> {}
struct MyDst<T: ?Sized>(T);
fn works<T>() {
let _: <T as Pointee>::Metadata = ();
let _: <[T] as Pointee>::Metadata = 1_usize;
let _: <str as Pointee>::Metadata = 1_usize;
let _: <dyn Trait<T> as Pointee>::Metadata = give::<DynMetadata<dyn Trait<T>>>();
let _: <MyDst<T> as Pointee>::Metadata = ();
let _: <((((([u8],),),),),) as Pointee>::Metadata = 1_usize;
}
fn meta_is<T: Pointee<Metadata = U> + ?Sized, U>() {}
fn give<U>() -> U {
loop {}
fn works<T>() {
meta_is::<T, ()>();
meta_is::<[T], usize>();
meta_is::<str, usize>();
meta_is::<dyn Trait<T>, DynMetadata<dyn Trait<T>>>();
meta_is::<MyDst<T>, ()>();
meta_is::<((((([u8],),),),),), usize>();
}
fn main() {}