1#![allow(dead_code, unused_variables)]
2// run-rustfix
3// Check projection of an associated type out of a higher-ranked trait-bound
4// in the context of a function signature.
5
6pub trait Foo<T> {
7    type A;
8
9    fn get(&self, t: T) -> Self::A;
10}
11
12fn foo2<I : for<'x> Foo<&'x isize>>(
13    x: <I as Foo<&isize>>::A)
14    //~^ ERROR cannot use the associated type of a trait with uninferred generic parameters
15{
16    // This case is illegal because we have to instantiate `'x`, and
17    // we don't know what region to instantiate it with.
18    //
19    // This could perhaps be made equivalent to the examples below,
20    // specifically for fn signatures.
21}
22
23fn foo3<I : for<'x> Foo<&'x isize>>(
24    x: <I as Foo<&isize>>::A)
25{
26    // OK, in this case we spelled out the precise regions involved, though we left one of
27    // them anonymous.
28}
29
30fn foo4<'a, I : for<'x> Foo<&'x isize>>(
31    x: <I as Foo<&'a isize>>::A)
32{
33    // OK, in this case we spelled out the precise regions involved.
34}
35
36
37pub fn main() {}
38