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// run-pass
#![feature(trait_alias)]
use std::marker::PhantomData;
trait Empty {}
trait EmptyAlias = Empty;
trait CloneDefault = Clone + Default;
trait SendSyncAlias = Send + Sync;
trait WhereSendAlias = where Self: Send;
trait SendEqAlias<T> = Send where T: PartialEq<Self>;
trait I32Iterator = Iterator<Item = i32>;
#[allow(dead_code)]
struct Foo<T: SendSyncAlias>(PhantomData<T>);
#[allow(dead_code)]
struct Bar<T>(PhantomData<T>) where T: SendSyncAlias;
impl dyn EmptyAlias {}
impl<T: SendSyncAlias> Empty for T {}
fn a<T: CloneDefault>() -> (T, T) {
let one = T::default();
let two = one.clone();
(one, two)
}
fn b(x: &impl SendEqAlias<i32>) -> bool {
22_i32 == *x
}
fn c<T: I32Iterator>(x: &mut T) -> Option<i32> {
x.next()
}
fn d<T: SendSyncAlias>() {
is_send_and_sync::<T>();
}
fn is_send_and_sync<T: Send + Sync>() {}
fn main() {
let both = a::<i32>();
assert_eq!(both.0, 0);
assert_eq!(both.1, 0);
let both: (i32, i32) = a();
assert_eq!(both.0, 0);
assert_eq!(both.1, 0);
assert!(b(&22));
assert_eq!(c(&mut vec![22].into_iter()), Some(22));
d::<i32>();
}
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