| //@ check-pass | |
| #![feature(generic_const_exprs)] | |
| #![allow(incomplete_features)] | |
| pub trait IsTrue<const T: bool> {} | |
| impl IsTrue<true> for () {} | |
| pub trait IsZST {} | |
| impl<T> IsZST for T | |
| where | |
| (): IsTrue<{ std::mem::size_of::<T>() == 0 }> | |
| {} | |
| fn _func() -> impl IsZST { | |
| || {} | |
| } | |
| fn main() {} |