Added systems

It's now officially an ECS, yay!


Former-commit-id: e2aacaa5c9fd362921cf3d064e346d11f942bd59

SDK/include/NDK/System.inl

@@ -0,0 +1,27 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Development Kit"
+// For conditions of distribution and use, see copyright notice in Prerequesites.hpp
+
+#include <Ndk/Algorithm.hpp>
+#include <type_traits>
+
+namespace Ndk
+{
+	template<typename SystemType>
+	System<SystemType>::System() :
+	BaseSystem(GetSystemId<SystemType>())
+	{
+	}
+
+	template<typename SystemType>
+	System<SystemType>::~System() = default;
+
+	template<typename SystemType>
+	BaseSystem* System<SystemType>::Clone() const
+	{
+		///FIXME: Pas encore supporté par GCC (4.9.2)
+		//static_assert(std::is_trivially_copy_constructible<SystemType>::value, "SystemType should be copy-constructible");
+
+		return new SystemType(static_cast<const SystemType&>(*this));
+	}
+}