mirror of https://github.com/rust-lang/rust
41 lines
958 B
Rust
41 lines
958 B
Rust
//@ run-pass
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#![allow(dead_code)]
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#![allow(unused_imports)]
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// Corrected regression test for #20831. The original did not compile.
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// When fixed, it revealed another problem concerning projections that
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// appear in associated type bindings in object types, which were not
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// being properly flagged.
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//@ pretty-expanded FIXME #23616
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use std::ops::{Shl, Shr};
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use std::cell::RefCell;
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pub trait Subscriber {
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type Input;
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fn dummy(&self) { }
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}
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pub trait Publisher<'a> {
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type Output;
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fn subscribe(&mut self, _: Box<dyn Subscriber<Input=Self::Output> + 'a>);
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}
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pub trait Processor<'a> : Subscriber + Publisher<'a> { }
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impl<'a, P> Processor<'a> for P where P : Subscriber + Publisher<'a> { }
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struct MyStruct<'a> {
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sub: Box<dyn Subscriber<Input=u64> + 'a>
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}
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impl<'a> Publisher<'a> for MyStruct<'a> {
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type Output = u64;
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fn subscribe(&mut self, t : Box<dyn Subscriber<Input=u64> + 'a>) {
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self.sub = t;
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}
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}
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fn main() {}
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