[rustc.git] / src / test / ui / rfc-2632-const-trait-impl / generic-bound.rs

// run-pass

#![allow(incomplete_features)]
#![feature(const_trait_impl)]
#![feature(const_fn_trait_bound)]

use std::marker::PhantomData;

struct S<T>(PhantomData<T>);

impl<T> Copy for S<T> {}
impl<T> Clone for S<T> {
    fn clone(&self) -> Self {
        S(PhantomData)
    }
}

impl<T> const std::ops::Add for S<T> {
    type Output = Self;

    fn add(self, _: Self) -> Self {
        S(std::marker::PhantomData)
    }
}

const fn twice<T: std::ops::Add>(arg: S<T>) -> S<T> {
    arg + arg
}

fn main() {
    let _ = twice(S(PhantomData::<i32>));
}
Commit	Line	Data
74b04a01 XL	1	// run-pass
	2
	3	#![allow(incomplete_features)]
	4	#![feature(const_trait_impl)]
cdc7bbd5	5	#![feature(const_fn_trait_bound)]
74b04a01 XL	6
	7	use std::marker::PhantomData;
	8
	9	struct S<T>(PhantomData<T>);
	10
	11	impl<T> Copy for S<T> {}
	12	impl<T> Clone for S<T> {
	13	fn clone(&self) -> Self {
	14	S(PhantomData)
	15	}
	16	}
	17
	18	impl<T> const std::ops::Add for S<T> {
	19	type Output = Self;
	20
	21	fn add(self, _: Self) -> Self {
	22	S(std::marker::PhantomData)
	23	}
	24	}
	25
	26	const fn twice<T: std::ops::Add>(arg: S<T>) -> S<T> {
	27	arg + arg
	28	}
	29
	30	fn main() {
	31	let _ = twice(S(PhantomData::<i32>));
	32	}