rust/src/test/ui/impl-trait/issue-55872.rs

19 lines
367 B
Rust

// ignore-compare-mode-chalk
#![feature(type_alias_impl_trait)]
pub trait Bar {
type E: Copy;
fn foo<T>() -> Self::E;
}
impl<S> Bar for S {
type E = impl Copy;
fn foo<T>() -> Self::E {
//~^ ERROR type parameter `T` is part of concrete type but not used in parameter list for the `impl Trait` type alias
|| ()
}
}
fn main() {}