Fix for PR17606 - result_of (and INVOKE) works incorrectly for member function pointers with ref qualifiers. Also a drive-by fix for common_type in C++03 mode. Thanks to Michel Morin for the bug report and the proposed fix.

llvm-svn: 201101

1 files changed, 50 insertions, 0 deletions

diff --git a/libcxx/test/utilities/function.objects/func.require/invoke.pass.cpp b/libcxx/test/utilities/function.objects/func.require/invoke.pass.cpp
new file mode 100644
index 00000000000..25681630a80
--- /dev/null
+++ b/libcxx/test/utilities/function.objects/func.require/invoke.pass.cpp
@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// [func.require]
+
+// INVOKE
+#if __cplusplus < 201103L
+int main () {}      // no __invoke in C++03
+#else
+
+#include <type_traits>
+
+template <typename T, int N>
+struct Array
+{
+    typedef T type[N];
+};
+
+struct Type
+{
+    Array<char, 1>::type& f1();
+    Array<char, 2>::type& f2() const;
+    
+    Array<char, 1>::type& g1()        &;
+    Array<char, 2>::type& g2() const  &;
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    Array<char, 3>::type& g3()       &&;
+    Array<char, 4>::type& g4() const &&;
+#endif
+};
+
+int main()
+{
+    static_assert(sizeof(std::__invoke(&Type::f1, std::declval<Type        >())) == 1, "");
+    static_assert(sizeof(std::__invoke(&Type::f2, std::declval<Type const  >())) == 2, "");
+    
+    static_assert(sizeof(std::__invoke(&Type::g1, std::declval<Type       &>())) == 1, "");
+    static_assert(sizeof(std::__invoke(&Type::g2, std::declval<Type const &>())) == 2, "");
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    static_assert(sizeof(std::__invoke(&Type::g3, std::declval<Type      &&>())) == 3, "");
+    static_assert(sizeof(std::__invoke(&Type::g4, std::declval<Type const&&>())) == 4, "");
+#endif
+}
+#endif