rust/src/test/run-pass/order-drop-with-match.rs

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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.
// Test to make sure the destructors run in the right order.
// Each destructor sets it's tag in the corresponding entry
// in ORDER matching up to when it ran.
// Correct order is: matched, inner, outer
static mut ORDER: [uint, ..3] = [0, 0, 0];
static mut INDEX: uint = 0;
struct A;
impl Drop for A {
fn drop(&mut self) {
unsafe {
ORDER[INDEX] = 1;
INDEX = INDEX + 1;
}
}
}
struct B;
impl Drop for B {
fn drop(&mut self) {
unsafe {
ORDER[INDEX] = 2;
INDEX = INDEX + 1;
}
}
}
struct C;
impl Drop for C {
fn drop(&mut self) {
unsafe {
ORDER[INDEX] = 3;
INDEX = INDEX + 1;
}
}
}
fn main() {
{
let matched = A;
let _outer = C;
{
match matched {
_s => {}
}
let _inner = B;
}
}
unsafe {
assert_eq!(&[1, 2, 3], ORDER.as_slice());
}
}