Objective-C++ ARC: Improve the conversion to a const __unsafe_unretained reference.

Under ARC++, a reference to a const Objective-C pointer is implicitly
treated as __unsafe_unretained, and can be initialized with (e.g.) a
__strong lvalue. Make sure this behavior does not break template
argument deduction and (related) that partial ordering still prefers a
'T* const&' template over a 'T const&' template when this case kicks
in. Fixes <rdar://problem/14467941>.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194239 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/test/SemaObjCXX/arc-templates.mm b/test/SemaObjCXX/arc-templates.mm
index ef68b94e72..b3519b9573 100644
--- a/test/SemaObjCXX/arc-templates.mm
+++ b/test/SemaObjCXX/arc-templates.mm
@@ -292,3 +292,13 @@ namespace rdar12367446 {
     A<id()> value;
   }
 }
+
+namespace rdar14467941 {
+  template<typename T> int &takePtr(const T &);
+  template<typename T> float &takePtr(T * const &);
+
+  void testTakePtr(A *a) {
+    float &fr1 = takePtr(a);
+    float &fr2 = takePtr<A>(a);
+  }
+}