1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Ensures that destructors are run for expressions of the form "let _ = e;"
12 // where `e` is a type which requires a destructor.
14 // pretty-expanded FIXME #23616
19 enum FooBar { _Foo(Foo), _Bar(uint) }
21 static mut NUM_DROPS: uint = 0;
25 unsafe { NUM_DROPS += 1; }
30 unsafe { NUM_DROPS += 1; }
35 unsafe { NUM_DROPS += 1; }
38 impl Drop for FooBar {
40 unsafe { NUM_DROPS += 1; }
45 assert_eq!(unsafe { NUM_DROPS }, 0);
47 assert_eq!(unsafe { NUM_DROPS }, 1);
48 { let _x = Bar { x: 21 }; }
49 assert_eq!(unsafe { NUM_DROPS }, 2);
51 assert_eq!(unsafe { NUM_DROPS }, 3);
52 { let _x = FooBar::_Foo(Foo); }
53 assert_eq!(unsafe { NUM_DROPS }, 5);
54 { let _x = FooBar::_Bar(42); }
55 assert_eq!(unsafe { NUM_DROPS }, 6);
58 assert_eq!(unsafe { NUM_DROPS }, 7);
59 { let _ = Bar { x: 21 }; }
60 assert_eq!(unsafe { NUM_DROPS }, 8);
62 assert_eq!(unsafe { NUM_DROPS }, 9);
63 { let _ = FooBar::_Foo(Foo); }
64 assert_eq!(unsafe { NUM_DROPS }, 11);
65 { let _ = FooBar::_Bar(42); }
66 assert_eq!(unsafe { NUM_DROPS }, 12);