Create make_signed.hpp

LB-- · LB-- · commit 7a1d92e8fec8 · 2013-11-18T23:32:08.000-06:00
diff --git a/tmp-make_signed/make_signed.hpp b/tmp-make_signed/make_signed.hpp
@@ -0,0 +1,17 @@
+#ifndef TemplateMetaprogramming_MakeSigned_HeaderPlusPlus
+#define TemplateMetaprogramming_MakeSigned_HeaderPlusPlus
+
+#include <type_traits>
+#include "identity.hpp" //see ../tmp-identity/
+
+#include <type_traits>
+
+template<typename T>
+using make_signed = typename std::conditional
+<
+	std::is_integral<T>::value,
+	std::make_signed<T>,
+	identity<T>
+>::type;
+
+#endif
