File: const_eval_resolve_canonical.rs

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// check-pass

#![feature(generic_const_exprs)]
#![allow(incomplete_features)]

trait Foo<const N: usize> {
    type Assoc: Default;
}

impl Foo<0> for () {
    type Assoc = u32;
}

impl Foo<3> for () {
    type Assoc = i64;
}

fn foo<T, const N: usize>(_: T) -> <() as Foo<{ N + 1 }>>::Assoc
where
    (): Foo<{ N + 1 }>,
{
    Default::default()
}

fn main() {
    let mut _q = Default::default();
    _q = foo::<_, 2>(_q);
}