mirror of https://github.com/rust-lang/rust
21 lines
518 B
Rust
21 lines
518 B
Rust
//@ revisions: current next
|
|
//@ ignore-compare-mode-next-solver (explicit revisions)
|
|
//@[next] compile-flags: -Znext-solver
|
|
#![feature(type_alias_impl_trait)]
|
|
|
|
type A = impl Foo; //[current]~ ERROR unconstrained opaque type
|
|
type B = impl Foo;
|
|
|
|
trait Foo {}
|
|
|
|
fn muh(x: A) -> B {
|
|
//[next]~^ ERROR type annotations needed: cannot satisfy `_ == A`
|
|
x // B's hidden type is A (opaquely)
|
|
//[current]~^ ERROR opaque type's hidden type cannot be another opaque type
|
|
}
|
|
|
|
struct Bar;
|
|
impl Foo for Bar {}
|
|
|
|
fn main() {}
|