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#![feature(generic_const_exprs)]
#![allow(incomplete_features)]
trait Trait {}
pub struct EvaluatableU128<const N: u128>;
struct HasCastInTraitImpl<const N: usize, const M: u128>;
impl<const O: usize> Trait for HasCastInTraitImpl<O, { O as u128 }> {}
pub fn use_trait_impl<const N: usize>()
where
[(); { N + 1}]:,
EvaluatableU128<{N as u128}>:, {
fn assert_impl<T: Trait>() {}
// errors are bad but seems to be pre-existing issue #86198
assert_impl::<HasCastInTraitImpl<{ N + 1 }, { N as u128 }>>();
//~^ Error: mismatched types
//~^^ Error: unconstrained generic constant
assert_impl::<HasCastInTraitImpl<{ N + 1 }, { N as _ }>>();
//~^ Error: mismatched types
//~^^ Error: unconstrained generic constant
assert_impl::<HasCastInTraitImpl<13, { 12 as u128 }>>();
//~^ Error: mismatched types
assert_impl::<HasCastInTraitImpl<14, 13>>();
//~^ Error: mismatched types
}
pub fn use_trait_impl_2<const N: usize>()
where
[(); { N + 1}]:,
EvaluatableU128<{N as _}>:, {
fn assert_impl<T: Trait>() {}
// errors are bad but seems to be pre-existing issue #86198
assert_impl::<HasCastInTraitImpl<{ N + 1 }, { N as u128 }>>();
//~^ Error: mismatched types
//~^^ Error: unconstrained generic constant
assert_impl::<HasCastInTraitImpl<{ N + 1 }, { N as _ }>>();
//~^ Error: mismatched types
//~^^ Error: unconstrained generic constant
assert_impl::<HasCastInTraitImpl<13, { 12 as u128 }>>();
//~^ Error: mismatched types
assert_impl::<HasCastInTraitImpl<14, 13>>();
//~^ Error: mismatched types
}
fn main() {}
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