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//@ run-pass
#![allow(dead_code)]
#![allow(unused_imports)]
// Corrected regression test for #20831. The original did not compile.
// When fixed, it revealed another problem concerning projections that
// appear in associated type bindings in object types, which were not
// being properly flagged.
use std::ops::{Shl, Shr};
use std::cell::RefCell;
pub trait Subscriber {
type Input;
fn dummy(&self) { }
}
pub trait Publisher<'a> {
type Output;
fn subscribe(&mut self, _: Box<dyn Subscriber<Input=Self::Output> + 'a>);
}
pub trait Processor<'a> : Subscriber + Publisher<'a> { }
impl<'a, P> Processor<'a> for P where P : Subscriber + Publisher<'a> { }
struct MyStruct<'a> {
sub: Box<dyn Subscriber<Input=u64> + 'a>
}
impl<'a> Publisher<'a> for MyStruct<'a> {
type Output = u64;
fn subscribe(&mut self, t : Box<dyn Subscriber<Input=u64> + 'a>) {
self.sub = t;
}
}
fn main() {}
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