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[rust.git] / src / test / ui / type-alias-impl-trait / issue-53678-generator-and-const-fn.rs
1 #![feature(generators, generator_trait, rustc_attrs)]
2 #![feature(type_alias_impl_trait)]
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
16 const FOO: GenOnce<usize, usize> = const_generator(10, 100);
17
18 #[rustc_error]
19 fn main() {} //~ ERROR