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#![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
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