// revisions: full min #![cfg_attr(full, feature(const_generics))] #![cfg_attr(full, allow(incomplete_features))] trait Foo {} impl 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{} impl FooImpl for [(); 0] {} impl FooImpl for [();N] {} fn foo(_: impl Foo) {} fn main() { foo([]); foo([()]); }