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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![feature(struct_variant)]
use std::task;
#[deriving(PartialEq, Show)]
enum Message {
Dropped,
DestructorRan
}
struct SendOnDrop {
sender: Sender<Message>
}
impl Drop for SendOnDrop {
fn drop(&mut self) {
self.sender.send(Dropped);
}
}
enum Foo {
SimpleVariant(Sender<Message>),
NestedVariant(Box<uint>, SendOnDrop, Sender<Message>),
FailingVariant { on_drop: SendOnDrop }
}
impl Drop for Foo {
fn drop(&mut self) {
match self {
&SimpleVariant(ref mut sender) => {
sender.send(DestructorRan);
}
&NestedVariant(_, _, ref mut sender) => {
sender.send(DestructorRan);
}
&FailingVariant { .. } => {
fail!("Failed");
}
}
}
}
pub fn main() {
let (sender, receiver) = channel();
{
let v = SimpleVariant(sender);
}
assert_eq!(receiver.recv(), DestructorRan);
assert_eq!(receiver.recv_opt().ok(), None);
let (sender, receiver) = channel();
{
let v = NestedVariant(box 42u, SendOnDrop { sender: sender.clone() }, sender);
}
assert_eq!(receiver.recv(), DestructorRan);
assert_eq!(receiver.recv(), Dropped);
assert_eq!(receiver.recv_opt().ok(), None);
let (sender, receiver) = channel();
task::spawn(proc() {
let v = FailingVariant { on_drop: SendOnDrop { sender: sender } };
});
assert_eq!(receiver.recv(), Dropped);
assert_eq!(receiver.recv_opt().ok(), None);
let (sender, receiver) = channel();
{
task::spawn(proc() {
let mut v = NestedVariant(box 42u, SendOnDrop {
sender: sender.clone()
}, sender.clone());
v = NestedVariant(box 42u, SendOnDrop { sender: sender.clone() }, sender.clone());
v = SimpleVariant(sender.clone());
v = FailingVariant { on_drop: SendOnDrop { sender: sender } };
});
}
assert_eq!(receiver.recv(), DestructorRan);
assert_eq!(receiver.recv(), Dropped);
assert_eq!(receiver.recv(), DestructorRan);
assert_eq!(receiver.recv(), Dropped);
assert_eq!(receiver.recv(), DestructorRan);
assert_eq!(receiver.recv(), Dropped);
assert_eq!(receiver.recv_opt().ok(), None);
}
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