rustc: Implement "mutable?". Add a test case and XFAIL it in rustboot for now.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/test/run-pass/maybe-mutable.rs b/src/test/run-pass/maybe-mutable.rs
new file mode 100644
index 00000000000..c0af0867faa
--- /dev/null
+++ b/src/test/run-pass/maybe-mutable.rs
@@ -0,0 +1,17 @@
+// -*- rust -*-
+
+fn len(vec[mutable? int] v) -> uint {
+    auto i = 0u;
+    for (int x in v) {
+        i += 1u;
+    }
+    ret i;
+}
+
+fn main() {
+    auto v0 = vec(1, 2, 3, 4, 5);
+    log len(v0);
+    auto v1 = vec(mutable 1, 2, 3, 4, 5);
+    log len(v1);
+}
+