21 lines
298 B
Rust
21 lines
298 B
Rust
//@ 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() {}
|