rustc: Add support of warning on unused imports

Fixes issue #889

1 files changed, 19 insertions, 0 deletions

diff --git a/src/test/compile-fail/unused-imports-warn.rs b/src/test/compile-fail/unused-imports-warn.rs
new file mode 100644
index 00000000000..88e42e0490a
--- /dev/null
+++ b/src/test/compile-fail/unused-imports-warn.rs
@@ -0,0 +1,19 @@
+// error-pattern:unused import
+import cal = bar::c::cc;
+
+mod foo {
+    type point = {x: int, y: int};
+    type square = {p: point, h: uint, w: uint};
+}
+
+mod bar {
+    mod c {
+        import foo::point;
+        import foo::square;
+        fn cc(p: point) -> str { ret 2 * (p.x + p.y); }
+    }
+}
+
+fn main() {
+    cal({x:3, y:9});
+}