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// run-pass
#![feature(generic_associated_types)]
// This test unsures that with_opt_const_param returns the
// def_id of the N param in the Bar::Assoc GAT.
trait Bar {
type Assoc<const N: usize>;
}
trait Foo: Bar {
fn foo(&self) -> Self::Assoc<3>;
}
impl Bar for () {
type Assoc<const N: usize> = [(); N];
}
impl Foo for () {
fn foo(&self) -> Self::Assoc<3> {
[(); 3]
}
}
fn main() {
assert_eq!(().foo(), [(); 3]);
}
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