//@ run-pass #![allow(non_upper_case_globals)] // FIXME(static_mut_refs): this could use an atomic #![allow(static_mut_refs)] 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); } }