add ext reference_wrapper

alib2std/src/extensions/functional.hpp

+/*
+ * functional.hpp
+ *
+ * Created on: Apr 1, 2013
+ * Author: Jan Travnicek
+ */
+
+#ifndef _FUNCTIONAL_HPP_
+#define _FUNCTIONAL_HPP_
+
+#include <functional>
+
+namespace ext {
+
+template < class T >
+class reference_wrapper : public std::reference_wrapper < T > {
+public:
+#ifdef __clang__
+	using std::reference_wrapper < T >::reference_wrapper;
+	using std::reference_wrapper < T >::operator =;
+#else
+	reference_wrapper ( ) noexcept : std::reference_wrapper < T > ( ) {
+	}
+
+	reference_wrapper ( const reference_wrapper & other ) = default;
+
+	reference_wrapper ( reference_wrapper && other ) = default;
+
+	using std::reference_wrapper < T >::reference_wrapper;
+
+	reference_wrapper & operator = ( reference_wrapper && other ) = default;
+
+	reference_wrapper & operator = ( const reference_wrapper & other ) = default;
+
+	using std::reference_wrapper < T >::operator =;
+#endif
+	using std::reference_wrapper < T >::operator T &;
+};
+
+} /* namespace ext */
+
+#endif /* _FUNCTIONAL_HPP_ */

alib2std/src/functional

 #ifndef __ALIB_INTERNAL_STD_EXTENSION_
 	#define __ALIB_INTERNAL_STD_EXTENSION_
-	#include "functional"
+	#include "extensions/functional.hpp"
 	#undef __ALIB_INTERNAL_STD_EXTENSION_
 #else