1 // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Tests that a heterogeneous list of existential types can be put inside an Arc
12 // and shared between threads as long as all types fulfill Send.
14 // ignore-emscripten no threads support
16 #![feature(box_syntax)]
19 use std::sync::mpsc::channel;
23 fn name(&self, blk: Box<FnMut(&str)>);
24 fn num_legs(&self) -> usize;
25 fn of_good_pedigree(&self) -> bool;
45 fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
46 fn num_legs(&self) -> usize { 4 }
47 fn of_good_pedigree(&self) -> bool { self.num_whiskers >= 4 }
50 fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
51 fn num_legs(&self) -> usize { 4 }
52 fn of_good_pedigree(&self) -> bool {
53 self.bark_decibels < 70 || self.tricks_known > 20
56 impl Pet for Goldfyshe {
57 fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
58 fn num_legs(&self) -> usize { 0 }
59 fn of_good_pedigree(&self) -> bool { self.swim_speed >= 500 }
63 let catte = Catte { num_whiskers: 7, name: "alonzo_church".to_string() };
67 name: "alan_turing".to_string(),
72 name: "albert_einstein".to_string(),
74 let fishe = Goldfyshe {
76 name: "alec_guinness".to_string(),
78 let arc = Arc::new(vec![box catte as Box<Pet+Sync+Send>,
79 box dogge1 as Box<Pet+Sync+Send>,
80 box fishe as Box<Pet+Sync+Send>,
81 box dogge2 as Box<Pet+Sync+Send>]);
82 let (tx1, rx1) = channel();
83 let arc1 = arc.clone();
84 let t1 = thread::spawn(move|| { check_legs(arc1); tx1.send(()); });
85 let (tx2, rx2) = channel();
86 let arc2 = arc.clone();
87 let t2 = thread::spawn(move|| { check_names(arc2); tx2.send(()); });
88 let (tx3, rx3) = channel();
89 let arc3 = arc.clone();
90 let t3 = thread::spawn(move|| { check_pedigree(arc3); tx3.send(()); });
99 fn check_legs(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
101 for pet in arc.iter() {
102 legs += pet.num_legs();
106 fn check_names(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
107 for pet in arc.iter() {
108 pet.name(Box::new(|name| {
109 assert!(name.as_bytes()[0] == 'a' as u8 && name.as_bytes()[1] == 'l' as u8);
113 fn check_pedigree(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
114 for pet in arc.iter() {
115 assert!(pet.of_good_pedigree());