| // 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 |
| |
| fn main() { } |
