117 lines
3.3 KiB
Rust
117 lines
3.3 KiB
Rust
// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Tests that a heterogeneous list of existential types can be put inside an Arc
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// and shared between tasks as long as all types fulfill Send.
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// ignore-pretty
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#![allow(unknown_features)]
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#![feature(box_syntax)]
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#![feature(unboxed_closures)]
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use std::sync::Arc;
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use std::sync::mpsc::channel;
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use std::thread::Thread;
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trait Pet {
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fn name(&self, blk: Box<FnMut(&str)>);
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fn num_legs(&self) -> uint;
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fn of_good_pedigree(&self) -> bool;
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}
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struct Catte {
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num_whiskers: uint,
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name: String,
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}
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struct Dogge {
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bark_decibels: uint,
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tricks_known: uint,
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name: String,
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}
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struct Goldfyshe {
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swim_speed: uint,
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name: String,
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}
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impl Pet for Catte {
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fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
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fn num_legs(&self) -> uint { 4 }
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fn of_good_pedigree(&self) -> bool { self.num_whiskers >= 4 }
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}
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impl Pet for Dogge {
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fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
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fn num_legs(&self) -> uint { 4 }
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fn of_good_pedigree(&self) -> bool {
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self.bark_decibels < 70 || self.tricks_known > 20
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}
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}
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impl Pet for Goldfyshe {
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fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
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fn num_legs(&self) -> uint { 0 }
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fn of_good_pedigree(&self) -> bool { self.swim_speed >= 500 }
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}
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pub fn main() {
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let catte = Catte { num_whiskers: 7, name: "alonzo_church".to_string() };
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let dogge1 = Dogge {
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bark_decibels: 100,
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tricks_known: 42,
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name: "alan_turing".to_string(),
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};
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let dogge2 = Dogge {
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bark_decibels: 55,
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tricks_known: 11,
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name: "albert_einstein".to_string(),
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};
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let fishe = Goldfyshe {
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swim_speed: 998,
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name: "alec_guinness".to_string(),
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};
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let arc = Arc::new(vec!(box catte as Box<Pet+Sync+Send>,
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box dogge1 as Box<Pet+Sync+Send>,
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box fishe as Box<Pet+Sync+Send>,
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box dogge2 as Box<Pet+Sync+Send>));
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let (tx1, rx1) = channel();
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let arc1 = arc.clone();
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let _t1 = Thread::spawn(move|| { check_legs(arc1); tx1.send(()); });
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let (tx2, rx2) = channel();
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let arc2 = arc.clone();
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let _t2 = Thread::spawn(move|| { check_names(arc2); tx2.send(()); });
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let (tx3, rx3) = channel();
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let arc3 = arc.clone();
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let _t3 = Thread::spawn(move|| { check_pedigree(arc3); tx3.send(()); });
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rx1.recv();
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rx2.recv();
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rx3.recv();
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}
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fn check_legs(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
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let mut legs = 0;
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for pet in &*arc {
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legs += pet.num_legs();
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}
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assert!(legs == 12);
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}
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fn check_names(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
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for pet in &*arc {
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pet.name(box |name| {
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assert!(name.as_bytes()[0] == 'a' as u8 && name.as_bytes()[1] == 'l' as u8);
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})
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}
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}
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fn check_pedigree(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
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for pet in &*arc {
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assert!(pet.of_good_pedigree());
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}
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}
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