| // revisions: full min |
| #![cfg_attr(full, feature(const_generics))] |
| #![cfg_attr(full, allow(incomplete_features))] |
| #![cfg_attr(min, feature(min_const_generics))] |
| |
| trait Foo {} |
| |
| impl<const N: usize> Foo for [(); N] |
| where |
| Self:FooImpl<{N==0}> |
| //[full]~^ERROR constant expression depends on a generic parameter |
| //[min]~^^ERROR generic parameters may not be used in const operations |
| {} |
| |
| trait FooImpl<const IS_ZERO: bool>{} |
| |
| impl FooImpl<true> for [(); 0] {} |
| |
| impl<const N:usize> FooImpl<false> for [();N] {} |
| |
| fn foo(_: impl Foo) {} |
| |
| fn main() { |
| foo([]); |
| foo([()]); |
| } |
