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-rw-r--r--tests/ui/binding/func-arg-ref-pattern.rs26
1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/binding/func-arg-ref-pattern.rs b/tests/ui/binding/func-arg-ref-pattern.rs
new file mode 100644
index 000000000..2d75c1214
--- /dev/null
+++ b/tests/ui/binding/func-arg-ref-pattern.rs
@@ -0,0 +1,26 @@
+// run-pass
+
+// Test argument patterns where we create refs to the inside of
+// boxes. Make sure that we don't free the box as we match the
+// pattern.
+
+#![feature(box_patterns)]
+
+fn getaddr(box ref x: Box<usize>) -> *const usize {
+ let addr: *const usize = &*x;
+ addr
+}
+
+fn checkval(box ref x: Box<usize>) -> usize {
+ *x
+}
+
+pub fn main() {
+ let obj: Box<_> = Box::new(1);
+ let objptr: *const usize = &*obj;
+ let xptr = getaddr(obj);
+ assert_eq!(objptr, xptr);
+
+ let obj = Box::new(22);
+ assert_eq!(checkval(obj), 22);
+}