mirror of https://github.com/rust-lang/rust
34 lines
704 B
Rust
34 lines
704 B
Rust
//@ run-pass
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#![allow(unused_must_use)]
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#![allow(unused_mut)]
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//@ needs-threads
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use std::thread;
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use std::sync::mpsc::{channel, Sender};
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fn start(tx: &Sender<Sender<String>>) {
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let (tx2, rx) = channel();
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tx.send(tx2).unwrap();
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let mut a;
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let mut b;
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a = rx.recv().unwrap();
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assert_eq!(a, "A".to_string());
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println!("{}", a);
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b = rx.recv().unwrap();
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assert_eq!(b, "B".to_string());
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println!("{}", b);
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}
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pub fn main() {
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let (tx, rx) = channel();
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let child = thread::spawn(move|| { start(&tx) });
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let mut c = rx.recv().unwrap();
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c.send("A".to_string()).unwrap();
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c.send("B".to_string()).unwrap();
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thread::yield_now();
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child.join();
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}
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