GEEKING

Base/include/rbx/callable.h

@@ -0,0 +1,212 @@
+
+#include "boost/type_traits/function_traits.hpp"
+
+namespace rbx
+{
+	// icallable and callable are a lightweight wrapper similar to boost::function,
+	// but with more efficient storage. Because the instances are special-cased for
+	// the functor involved you can't treat callable generically - it has to be
+	// used in the context of template code that knows what to do with it.
+
+	// See rbx::signals for an implementation that uses this in lieu of boost::function
+
+	template<int arity, typename Signature>
+	class icallable;
+
+	template<typename Signature>
+	class icallable<0, Signature>
+	{
+	public:
+		virtual void call() = 0;
+	};
+
+	template<typename Signature>
+	class icallable<1, Signature>
+	{
+	public:
+		virtual void call(typename boost::function_traits<Signature>::arg1_type arg1) = 0;
+	};
+
+	template<typename Signature>
+	class icallable<2, Signature>
+	{
+	public:
+		virtual void call(typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2) = 0;
+	};
+
+	template<typename Signature>
+	class icallable<3, Signature>
+	{
+	public:
+		virtual void call(typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2,
+			typename boost::function_traits<Signature>::arg3_type arg3) = 0;
+	};
+
+	template<typename Signature>
+	class icallable<4, Signature>
+	{
+	public:
+		virtual void call(typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2,
+			typename boost::function_traits<Signature>::arg3_type arg3,
+			typename boost::function_traits<Signature>::arg4_type arg4) = 0;
+	};
+    
+    template<typename Signature>
+	class icallable<5, Signature>
+	{
+	public:
+		virtual void call(typename boost::function_traits<Signature>::arg1_type arg1,
+                          typename boost::function_traits<Signature>::arg2_type arg2,
+                          typename boost::function_traits<Signature>::arg3_type arg3,
+                          typename boost::function_traits<Signature>::arg4_type arg4,
+                          typename boost::function_traits<Signature>::arg5_type arg5) = 0;
+	};
+
+	template<typename Signature>
+	class icallable<6, Signature>
+	{
+	public:
+		virtual void call(typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2,
+			typename boost::function_traits<Signature>::arg3_type arg3,
+			typename boost::function_traits<Signature>::arg4_type arg4,
+			typename boost::function_traits<Signature>::arg5_type arg5,
+			typename boost::function_traits<Signature>::arg6_type arg6) = 0;
+	};
+
+	template<typename Signature>
+	class icallable<7, Signature>
+	{
+	public:
+		virtual void call(typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2,
+			typename boost::function_traits<Signature>::arg3_type arg3,
+			typename boost::function_traits<Signature>::arg4_type arg4,
+			typename boost::function_traits<Signature>::arg5_type arg5,
+			typename boost::function_traits<Signature>::arg6_type arg6,
+			typename boost::function_traits<Signature>::arg7_type arg7) = 0;
+	};
+
+	template<class Base, class Delegate, int arity, typename Signature>
+	class callable;
+
+	template<class Base, class Delegate, typename Signature>
+	class callable<Base, Delegate, 0, Signature> : public Base
+	{
+		Delegate deleg;
+	public:
+		template<typename Arg1>
+		callable(const Delegate& d, Arg1 arg1)
+			:Base(arg1)
+			,deleg(d) 
+		{}
+		virtual void call() { deleg(); }
+	};
+
+	template<class Base, class Delegate, typename Signature>
+	class callable<Base, Delegate, 1, Signature> : public Base
+	{
+		Delegate deleg;
+	public:
+		template<typename Arg1>
+		callable(const Delegate& deleg, Arg1 arg1):Base(arg1),deleg(deleg) {}
+		virtual void call(typename boost::function_traits<Signature>::arg1_type arg1) { deleg(arg1); }
+	};
+		
+	template<class Base, class Delegate, typename Signature>
+	class callable<Base, Delegate, 2, Signature> : public Base
+	{
+		Delegate deleg;
+	public:
+		template<typename Arg1>
+		callable(const Delegate& deleg, Arg1 arg1):Base(arg1),deleg(deleg) {}
+		virtual void call(
+			typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2
+			) { deleg(arg1, arg2); }
+	};
+	
+	template<class Base, class Delegate, typename Signature>
+	class callable<Base, Delegate, 3, Signature> : public Base
+	{
+		Delegate deleg;
+	public:
+		template<typename Arg1>
+		callable(const Delegate& deleg, Arg1 arg1):Base(arg1),deleg(deleg) {}
+		virtual void call(
+			typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2,
+			typename boost::function_traits<Signature>::arg3_type arg3
+			) { deleg(arg1, arg2, arg3); }
+	};
+	
+	template<class Base, class Delegate, typename Signature>
+	class callable<Base, Delegate, 4, Signature> : public Base
+	{
+		Delegate deleg;
+	public:
+		template<typename Arg1>
+		callable(const Delegate& deleg, Arg1 arg1):Base(arg1),deleg(deleg) {}
+		virtual void call(
+			typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2,
+			typename boost::function_traits<Signature>::arg3_type arg3,
+			typename boost::function_traits<Signature>::arg4_type arg4
+			) { deleg(arg1, arg2, arg3, arg4); }
+	};
+    
+    template<class Base, class Delegate, typename Signature>
+	class callable<Base, Delegate, 5, Signature> : public Base
+	{
+		Delegate deleg;
+	public:
+		template<typename Arg1>
+		callable(const Delegate& deleg, Arg1 arg1):Base(arg1),deleg(deleg) {}
+		virtual void call(
+                          typename boost::function_traits<Signature>::arg1_type arg1,
+                          typename boost::function_traits<Signature>::arg2_type arg2,
+                          typename boost::function_traits<Signature>::arg3_type arg3,
+                          typename boost::function_traits<Signature>::arg4_type arg4,
+                          typename boost::function_traits<Signature>::arg5_type arg5
+                          ) { deleg(arg1, arg2, arg3, arg4, arg5); }
+	};
+
+	template<class Base, class Delegate, typename Signature>
+	class callable<Base, Delegate, 6, Signature> : public Base
+	{
+		Delegate deleg;
+	public:
+		template<typename Arg1>
+		callable(const Delegate& deleg, Arg1 arg1):Base(arg1),deleg(deleg) {}
+		virtual void call(
+			typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2,
+			typename boost::function_traits<Signature>::arg3_type arg3,
+			typename boost::function_traits<Signature>::arg4_type arg4,
+			typename boost::function_traits<Signature>::arg5_type arg5,
+			typename boost::function_traits<Signature>::arg6_type arg6
+			) { deleg(arg1, arg2, arg3, arg4, arg5, arg6); }
+	};
+
+	template<class Base, class Delegate, typename Signature>
+	class callable<Base, Delegate, 7, Signature> : public Base
+	{
+		Delegate deleg;
+	public:
+		template<typename Arg1>
+		callable(const Delegate& deleg, Arg1 arg1):Base(arg1),deleg(deleg) {}
+		virtual void call(
+			typename boost::function_traits<Signature>::arg1_type arg1,
+			typename boost::function_traits<Signature>::arg2_type arg2,
+			typename boost::function_traits<Signature>::arg3_type arg3,
+			typename boost::function_traits<Signature>::arg4_type arg4,
+			typename boost::function_traits<Signature>::arg5_type arg5,
+			typename boost::function_traits<Signature>::arg6_type arg6,
+			typename boost::function_traits<Signature>::arg7_type arg7
+			) { deleg(arg1, arg2, arg3, arg4, arg5, arg6, arg7); }
+	};
+	
+}