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