[rustc.git] / src / test / ui / type-alias-impl-trait / not_a_defining_use.rs

#![feature(type_alias_impl_trait)]

use std::fmt::Debug;

fn main() {}

type Two<T, U> = impl Debug;

fn three<T: Debug, U>(t: T) -> Two<T, U> {
    (t, 5i8)
    //~^ ERROR `T` doesn't implement `Debug`
}

trait Bar {
    type Blub: Debug;
    const FOO: Self::Blub;
}

impl Bar for u32 {
    type Blub = i32;
    const FOO: i32 = 42;
}

fn four<T: Debug, U: Bar>(t: T) -> Two<T, U> {
    (t, <U as Bar>::FOO)
    //~^ ERROR `U: Bar` is not satisfied
    //~| ERROR `T` doesn't implement `Debug`
}

fn is_sync<T: Sync>() {}

fn asdfl() {
    //FIXME(oli-obk): these currently cause cycle errors
    //is_sync::<Two<i32, u32>>();
    //is_sync::<Two<i32, *const i32>>();
}
Commit	Line	Data
94222f64	1	#![feature(type_alias_impl_trait)]
9fa01778 XL	2
	3	use std::fmt::Debug;
	4
	5	fn main() {}
	6
416331ca	7	type Two<T, U> = impl Debug;
9fa01778	8
9fa01778 XL	9	fn three<T: Debug, U>(t: T) -> Two<T, U> {
9fa01778 XL	10	(t, 5i8)
04454e1e	11	//~^ ERROR `T` doesn't implement `Debug`
9fa01778 XL	12	}
	13
	14	trait Bar {
	15	type Blub: Debug;
	16	const FOO: Self::Blub;
	17	}
	18
	19	impl Bar for u32 {
	20	type Blub = i32;
	21	const FOO: i32 = 42;
	22	}
	23
1b1a35ee	24	fn four<T: Debug, U: Bar>(t: T) -> Two<T, U> {
9fa01778	25	(t, <U as Bar>::FOO)
04454e1e FG	26	//~^ ERROR `U: Bar` is not satisfied
04454e1e FG	27	//~\| ERROR `T` doesn't implement `Debug`
9fa01778 XL	28	}
	29
	30	fn is_sync<T: Sync>() {}
	31
	32	fn asdfl() {
	33	//FIXME(oli-obk): these currently cause cycle errors
	34	//is_sync::<Two<i32, u32>>();
	35	//is_sync::<Two<i32, *const i32>>();
	36	}