1 #![feature(generic_const_exprs)]
2 #![allow(incomplete_features)]
5 pub struct EvaluatableU128<const N: u128>;
7 struct HasCastInTraitImpl<const N: usize, const M: u128>;
8 impl<const O: usize> Trait for HasCastInTraitImpl<O, { O as u128 }> {}
10 pub fn use_trait_impl<const N: usize>()
13 EvaluatableU128<{N as u128}>:, {
14 fn assert_impl<T: Trait>() {}
16 // errors are bad but seems to be pre-existing issue #86198
17 assert_impl::<HasCastInTraitImpl<{ N + 1 }, { N as u128 }>>();
18 //~^ Error: mismatched types
19 //~^^ Error: unconstrained generic constant
20 assert_impl::<HasCastInTraitImpl<{ N + 1 }, { N as _ }>>();
21 //~^ Error: mismatched types
22 //~^^ Error: unconstrained generic constant
23 assert_impl::<HasCastInTraitImpl<13, { 12 as u128 }>>();
24 //~^ Error: mismatched types
25 assert_impl::<HasCastInTraitImpl<14, 13>>();
26 //~^ Error: mismatched types
28 pub fn use_trait_impl_2<const N: usize>()
31 EvaluatableU128<{N as _}>:, {
32 fn assert_impl<T: Trait>() {}
34 // errors are bad but seems to be pre-existing issue #86198
35 assert_impl::<HasCastInTraitImpl<{ N + 1 }, { N as u128 }>>();
36 //~^ Error: mismatched types
37 //~^^ Error: unconstrained generic constant
38 assert_impl::<HasCastInTraitImpl<{ N + 1 }, { N as _ }>>();
39 //~^ Error: mismatched types
40 //~^^ Error: unconstrained generic constant
41 assert_impl::<HasCastInTraitImpl<13, { 12 as u128 }>>();
42 //~^ Error: mismatched types
43 assert_impl::<HasCastInTraitImpl<14, 13>>();
44 //~^ Error: mismatched types