src/test/ui/builtin-superkinds/builtin-superkinds-capabilities-xc.rs

   1 // run-pass
   2 // aux-build:trait_superkinds_in_metadata.rs
   3
   4 // Tests "capabilities" granted by traits with super-builtin-kinds,
   5 // even when using them cross-crate.
   6
   7
   8 extern crate trait_superkinds_in_metadata;
   9
  10 use std::sync::mpsc::{channel, Sender, Receiver};
  11 use trait_superkinds_in_metadata::{RequiresRequiresShareAndSend, RequiresShare};
  12
  13 #[derive(PartialEq, Debug)]
  14 struct X<T>(T);
  15
  16 impl <T: Sync> RequiresShare for X<T> { }
  17 impl <T: Sync+Send> RequiresRequiresShareAndSend for X<T> { }
  18
  19 fn foo<T: RequiresRequiresShareAndSend + 'static>(val: T, chan: Sender<T>) {
  20     chan.send(val).unwrap();
  21 }
  22
  23 pub fn main() {
  24     let (tx, rx): (Sender<X<isize>>, Receiver<X<isize>>) = channel();
  25     foo(X(31337), tx);
  26     assert_eq!(rx.recv().unwrap(), X(31337));
  27 }