090040bf40
for `~str`/`~[]`. Note that `~self` still remains, since I forgot to add support for `Box<self>` before the snapshot. How to update your code: * Instead of `~EXPR`, you should write `box EXPR`. * Instead of `~TYPE`, you should write `Box<Type>`. * Instead of `~PATTERN`, you should write `box PATTERN`. [breaking-change]
53 lines
1.2 KiB
Rust
53 lines
1.2 KiB
Rust
// Copyright 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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// This test verifies that temporaries created for `while`'s and `if`
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// conditions are dropped after the condition is evaluated.
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struct Temporary;
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static mut DROPPED: int = 0;
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impl Drop for Temporary {
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fn drop(&mut self) {
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unsafe { DROPPED += 1; }
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}
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}
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impl Temporary {
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fn do_stuff(&self) -> bool {true}
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}
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fn borrow() -> Box<Temporary> { box Temporary }
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pub fn main() {
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let mut i = 0;
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// This loop's condition
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// should call `Temporary`'s
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// `drop` 6 times.
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while borrow().do_stuff() {
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i += 1;
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unsafe { assert_eq!(DROPPED, i) }
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if i > 5 {
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break;
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}
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}
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// This if condition should
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// call it 1 time
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if borrow().do_stuff() {
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unsafe { assert_eq!(DROPPED, i + 1) }
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}
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}
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