rust/src/test/ui/rfc-2632-const-trait-impl/const-impl-trait.rs

// check-pass
#![feature(associated_type_bounds, const_trait_impl, const_cmp)]

use std::marker::Destruct;

const fn cmp(a: &impl ~const PartialEq) -> bool {
    a == a
}

const fn wrap(x: impl ~const PartialEq + ~const Destruct) -> impl ~const PartialEq + ~const Destruct {
    x
}

const _: () = {
    assert!(cmp(&0xDEADBEEFu32));
    assert!(cmp(&()));
    assert!(wrap(123) == wrap(123));
    assert!(wrap(123) != wrap(456));
};

#[const_trait]
trait T {}
struct S;
impl const T for S {}

const fn rpit() -> impl ~const T { S }

const fn apit(_: impl ~const T + ~const Destruct) {}

const fn rpit_assoc_bound() -> impl IntoIterator<Item: ~const T> { Some(S) }

const fn apit_assoc_bound(_: impl IntoIterator<Item: ~const T> + ~const Destruct) {}

fn main() {}