Fix http://llvm.org/bugs/show_bug.cgi?id=11459. Patch supplied by Alberto Ganesh Barbati.

llvm-svn: 145703

1 files changed, 10 insertions, 0 deletions

diff --git a/libcxx/include/type_traits b/libcxx/include/type_traits
index 14fa4c4dbce..924a60261c5 100644
--- a/libcxx/include/type_traits
+++ b/libcxx/include/type_traits
@@ -741,6 +741,14 @@ struct _LIBCPP_VISIBLE is_base_of
 
 // is_empty
 
+#if __has_feature(is_empty)
+
+template <class _Tp>
+struct _LIBCPP_VISIBLE is_empty
+    : public integral_constant<bool, __is_empty(_Tp)> {};
+
+#else  // __has_feature(is_empty)
+
 template <class _Tp>
 struct __is_empty1
     : public _Tp
@@ -760,6 +768,8 @@ template <class _Tp> struct __libcpp_empty<_Tp, false> : public false_type {};
 
 template <class _Tp> struct _LIBCPP_VISIBLE is_empty : public __libcpp_empty<_Tp> {};
 
+#endif  // __has_feature(is_empty)
+
 // is_polymorphic
 
 template <class _Tp> struct __is_polymorphic1 : public _Tp {};