librustc: Make sure to run destructors in the right order when matching on moved value.

src/test/run-pass/order-drop-with-match.rs

@@ -0,0 +1,64 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+
+// Test to make sure the destructors run in the right order.
+// Each destructor sets it's tag in the corresponding entry
+// in ORDER matching up to when it ran.
+// Correct order is: matched, inner, outer
+
+static mut ORDER: [uint, ..3] = [0, 0, 0];
+static mut INDEX: uint = 0;
+
+struct A;
+impl Drop for A {
+    fn drop(&mut self) {
+        unsafe {
+            ORDER[INDEX] = 1;
+            INDEX = INDEX + 1;
+        }
+    }
+}
+
+struct B;
+impl Drop for B {
+    fn drop(&mut self) {
+        unsafe {
+            ORDER[INDEX] = 2;
+            INDEX = INDEX + 1;
+        }
+    }
+}
+
+struct C;
+impl Drop for C {
+    fn drop(&mut self) {
+        unsafe {
+            ORDER[INDEX] = 3;
+            INDEX = INDEX + 1;
+        }
+    }
+}
+
+fn main() {
+    {
+        let matched = A;
+        let _outer = C;
+        {
+            match matched {
+                _s => {}
+            }
+            let _inner = B;
+        }
+    }
+    unsafe {
+        assert_eq!(&[1, 2, 3], ORDER.as_slice());
+    }
+}