1 files changed, 21 insertions, 0 deletions
diff --git a/clang/test/SemaObjC/id.m b/clang/test/SemaObjC/id.m
new file mode 100644
index 0000000..27b84de
--- /dev/null
+++ b/clang/test/SemaObjC/id.m
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+@protocol Foo;
+
+Class T;
+id<Foo> S;
+id R;
+void foo() {
+  // Test assignment compatibility of Class and id.  No warning should be
+  // produced.
+  // rdar://6770142 - Class and id<foo> are compatible.
+  S = T; // expected-warning {{incompatible pointer types assigning to 'id<Foo>' from 'Class'}}
+  T = S; // expected-warning {{incompatible pointer types assigning to 'Class' from 'id<Foo>'}}
+  R = T; T = R;
+  R = S; S = R;
+}
+
+// Test attempt to redefine 'id' in an incompatible fashion.
+typedef int id;  // FIXME: Decide how we want to deal with this (now that 'id' is more of a built-in type).
+id b;
+