add BoolConstant

ostd/#limits.hh#

@@ -0,0 +1,19 @@
+/* Various type limits.
+ *
+ * This file is part of OctaSTD. See COPYING.md for futher information.
+ */
+
+#ifndef OSTD_LIMTIS_HH
+#define OSTD_LIMITS_HH
+
+#include <limits.h>
+
+namespace ostd {
+
+template<typename>
+struct Limits {
+};
+
+} /* namespace ostd */
+
+#endif

ostd/type_traits.hh

@@ -59,8 +59,11 @@ struct Constant {
     constexpr Value operator()() const { return value; }
 };
 
-using True = Constant<bool, true>;
+template<bool val>
-using False = Constant<bool, false>;
+using BoolConstant = Constant<bool, val>;
+
+using True = BoolConstant<true>;
+using False = BoolConstant<false>;
 
 template<typename T, T val> constexpr T Constant<T, val>::value;