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Diffstat (limited to 'tests/ui/for-loop-while/cleanup-rvalue-during-if-and-while.rs')
-rw-r--r--tests/ui/for-loop-while/cleanup-rvalue-during-if-and-while.rs41
1 files changed, 41 insertions, 0 deletions
diff --git a/tests/ui/for-loop-while/cleanup-rvalue-during-if-and-while.rs b/tests/ui/for-loop-while/cleanup-rvalue-during-if-and-while.rs
new file mode 100644
index 000000000..afc77355a
--- /dev/null
+++ b/tests/ui/for-loop-while/cleanup-rvalue-during-if-and-while.rs
@@ -0,0 +1,41 @@
+// run-pass
+// This test verifies that temporaries created for `while`'s and `if`
+// conditions are dropped after the condition is evaluated.
+
+struct Temporary;
+
+static mut DROPPED: isize = 0;
+
+impl Drop for Temporary {
+ fn drop(&mut self) {
+ unsafe { DROPPED += 1; }
+ }
+}
+
+impl Temporary {
+ fn do_stuff(&self) -> bool {true}
+}
+
+fn borrow() -> Box<Temporary> { Box::new(Temporary) }
+
+
+pub fn main() {
+ let mut i = 0;
+
+ // This loop's condition
+ // should call `Temporary`'s
+ // `drop` 6 times.
+ while borrow().do_stuff() {
+ i += 1;
+ unsafe { assert_eq!(DROPPED, i) }
+ if i > 5 {
+ break;
+ }
+ }
+
+ // This if condition should
+ // call it 1 time
+ if borrow().do_stuff() {
+ unsafe { assert_eq!(DROPPED, i + 1) }
+ }
+}