Use BSS default constructor

include/PSX/Auxiliary/type_traits.hpp

@@ -2,6 +2,27 @@
 #define __JABYENGINE_TYPE_TRAITS_HPP__
 
 namespace JabyEngine {
+    template <class T, T v>
+    struct integral_constant {
+        static constexpr T value = v;
+  
+        typedef T                      value_type;
+        typedef integral_constant<T,v> type;
+
+        constexpr operator T() const {
+            return v; 
+        }
+    
+        constexpr T operator()() const {
+            return v; 
+        }
+    };
+
+    typedef integral_constant<bool, true>  true_type;
+    typedef integral_constant<bool, false> false_type;
+
+    // #############################################
+
     template<bool B, class T = void>
     struct enable_if {};
  
@@ -53,6 +74,8 @@ namespace JabyEngine {
 
     template<typename T, typename... Ts>
     using variadic_force_same = enable_if<conjunction<is_same<T, Ts>...>::value>::type;
+
+    // #############################################
 }
 
 #endif //! __JABYENGINE_TYPE_TRAITS_HPP__