[rustc.git] / src / test / ui / const-generics / lazy-normalization / issue-71922.rs

// run-pass
#![feature(const_generics)]
#![allow(incomplete_features)]
trait Foo {}

impl<const N: usize> Foo for [(); N] where Self: FooImpl<{ N == 0 }> {}

trait FooImpl<const IS_ZERO: bool> {}

impl FooImpl<{ 0u8 == 0u8 }> for [(); 0] {}

impl<const N: usize> FooImpl<{ 0u8 != 0u8 }> for [(); N] {}

fn foo<T: Foo>(_: T) {}

fn main() {
    foo([]);
    foo([()]);
}
Commit	Line	Data
f9f354fc XL	1	// run-pass
	2	#![feature(const_generics)]
	3	#![allow(incomplete_features)]
	4	trait Foo {}
	5
	6	impl<const N: usize> Foo for [(); N] where Self: FooImpl<{ N == 0 }> {}
	7
	8	trait FooImpl<const IS_ZERO: bool> {}
	9
	10	impl FooImpl<{ 0u8 == 0u8 }> for [(); 0] {}
	11
	12	impl<const N: usize> FooImpl<{ 0u8 != 0u8 }> for [(); N] {}
	13
	14	fn foo<T: Foo>(_: T) {}
	15
	16	fn main() {
	17	foo([]);
	18	foo([()]);
	19	}