[rustc.git] / src / test / ui / type-alias-impl-trait / issue-53678-generator-and-const-fn.rs

#![feature(generators, generator_trait, rustc_attrs)]
#![feature(type_alias_impl_trait)]

use std::ops::Generator;

type GenOnce<Y, R> = impl Generator<Yield = Y, Return = R>;

const fn const_generator<Y, R>(yielding: Y, returning: R) -> GenOnce<Y, R> {
    move || {
        yield yielding;

        return returning;
    }
}

const FOO: GenOnce<usize, usize> = const_generator(10, 100);

#[rustc_error]
fn main() {} //~ ERROR
Commit	Line	Data
ee023bcb	1	#![feature(generators, generator_trait, rustc_attrs)]
94222f64	2	#![feature(type_alias_impl_trait)]
416331ca XL	3
	4	use std::ops::Generator;
	5
	6	type GenOnce<Y, R> = impl Generator<Yield = Y, Return = R>;
	7
	8	const fn const_generator<Y, R>(yielding: Y, returning: R) -> GenOnce<Y, R> {
	9	move \|\| {
	10	yield yielding;
	11
	12	return returning;
	13	}
	14	}
	15
136023e0	16	const FOO: GenOnce<usize, usize> = const_generator(10, 100);
416331ca	17
6a06907d	18	#[rustc_error]
136023e0	19	fn main() {} //~ ERROR