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// check-pass
#![feature(generators, generator_trait)]
#![feature(type_alias_impl_trait)]
use std::ops::{Generator, GeneratorState};
use std::pin::Pin;
type RandGenerator<'a> = impl Generator<Return = (), Yield = u64> + 'a;
fn rand_generator<'a>(rng: &'a ()) -> RandGenerator<'a> {
move || {
let _rng = rng;
loop {
yield 0;
}
}
}
pub type RandGeneratorWithIndirection<'c> = impl Generator<Return = (), Yield = u64> + 'c;
pub fn rand_generator_with_indirection<'a>(rng: &'a ()) -> RandGeneratorWithIndirection<'a> {
fn helper<'b>(rng: &'b ()) -> impl 'b + Generator<Return = (), Yield = u64> {
move || {
let _rng = rng;
loop {
yield 0;
}
}
}
helper(rng)
}
fn main() {
let mut gen = rand_generator(&());
match unsafe { Pin::new_unchecked(&mut gen) }.resume(()) {
GeneratorState::Yielded(_) => {}
GeneratorState::Complete(_) => {}
};
}
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