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pub trait Element<S> {
type Array;
}
impl<T> Element<()> for T {
type Array = T;
}
impl<T: Element<S>, S> Element<[S; 3]> for T {
type Array = [T::Array; 3];
}
trait Foo<I>
where
u8: Element<I>,
{
fn foo(self, x: <u8 as Element<I>>::Array);
}
impl<I> Foo<I> for u16
where
u8: Element<I>,
{
fn foo(self, _: <u8 as Element<I>>::Array) {}
}
fn main() {
let b: [u8; 3] = [0u8; 3];
0u16.foo(b); //~ ERROR type annotations needed
//~^ ERROR type annotations needed
//<u16 as Foo<[(); 3]>>::foo(0u16, b);
}
|
