New upstream version 1.49.0~beta.4+dfsg1

[rustc.git] / src / test / ui / const-generics / issues / issue-61935.rs

// 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([()]);
}