44 lines
1.3 KiB
Rust
44 lines
1.3 KiB
Rust
// Copyright 2013 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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static mut drop_count: usize = 0;
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struct Foo {
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dropped: bool
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}
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impl Drop for Foo {
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fn drop(&mut self) {
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// Test to make sure we haven't dropped already
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assert!(!self.dropped);
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self.dropped = true;
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// And record the fact that we dropped for verification later
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unsafe { drop_count += 1; }
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}
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}
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pub fn main() {
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// An `if true { expr }` statement should compile the same as `{ expr }`.
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if true {
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let _a = Foo{ dropped: false };
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}
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// Check that we dropped already (as expected from a `{ expr }`).
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unsafe { assert_eq!(drop_count, 1); }
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// An `if false {} else { expr }` statement should compile the same as `{ expr }`.
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if false {
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panic!();
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} else {
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let _a = Foo{ dropped: false };
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}
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// Check that we dropped already (as expected from a `{ expr }`).
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unsafe { assert_eq!(drop_count, 2); }
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}
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