mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 07:14:28 +00:00
32 lines
619 B
Rust
32 lines
619 B
Rust
// Test that an impl with only one bound region `'a` cannot be used to
|
|
// satisfy a constraint where there are two bound regions.
|
|
|
|
trait Foo<X> {
|
|
fn foo(&self, x: X) { }
|
|
}
|
|
|
|
fn want_foo2<T>()
|
|
where T : for<'a,'b> Foo<(&'a isize, &'b isize)>
|
|
{
|
|
}
|
|
|
|
fn want_foo1<T>()
|
|
where T : for<'z> Foo<(&'z isize, &'z isize)>
|
|
{
|
|
}
|
|
|
|
// Expressed as a where clause
|
|
|
|
struct SomeStruct;
|
|
|
|
impl<'a> Foo<(&'a isize, &'a isize)> for SomeStruct
|
|
{
|
|
}
|
|
|
|
fn a() { want_foo1::<SomeStruct>(); } // OK -- foo wants just one region
|
|
fn b() { want_foo2::<SomeStruct>(); }
|
|
//~^ ERROR implementation of
|
|
//~| ERROR implementation of
|
|
|
|
fn main() { }
|