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#![feature(generic_associated_types)]
#[derive(Default)]
struct E<T> {
data: T,
}
trait TestMut {
type Output<'a>;
fn test_mut<'a>(&'a mut self) -> Self::Output<'a>;
}
impl<T> TestMut for E<T>
where
T: 'static,
{
type Output<'a> = &'a mut T;
fn test_mut<'a>(&'a mut self) -> Self::Output<'a> {
&mut self.data
}
}
fn test_simpler<'a>(dst: &'a mut impl TestMut<Output = &'a mut f32>)
//~^ ERROR missing generics for associated type
{
for n in 0i16..100 {
*dst.test_mut() = n.into();
}
}
fn main() {
let mut t1: E<f32> = Default::default();
test_simpler(&mut t1);
}
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