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//@ run-pass
// Test equality constraints on associated types in a where clause.
pub trait Foo {
type A;
fn boo(&self) -> <Self as Foo>::A;
}
#[derive(PartialEq)]
pub struct Bar;
impl Foo for isize {
type A = usize;
fn boo(&self) -> usize { 42 }
}
impl Foo for char {
type A = Bar;
fn boo(&self) -> Bar { Bar }
}
fn foo_bar<I: Foo<A=Bar>>(x: I) -> Bar {
x.boo()
}
fn foo_uint<I: Foo<A=usize>>(x: I) -> usize {
x.boo()
}
pub fn main() {
let a = 42;
foo_uint(a);
let a = 'a';
foo_bar(a);
}
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