ShaderManager/typeresolver.cpp

## typeresolver.cpp
#include <stdio.h>
#include <string>

template<typename Arg> const char* type_to_str();

template<typename...> struct VarIterator;

template<typename Head> struct VarIterator<Head>
{
	static std::string eval()
	{
		return type_to_str<Head>();
	};
};

template<typename Head, typename... Rest> struct VarIterator<Head, Rest...>
{
	static std::string eval()
	{
		return VarIterator<Head>::eval() + ";" + VarIterator<Rest...>::eval();
	}
};

template<typename... Args> std::string resolve()
{
   return VarIterator<Args...>::eval();
};

template<> const char* type_to_str<int>()
{
	return "int";
}

template<> const char* type_to_str<float>()
{
	return "float";
}

template<> const char* type_to_str<void>()
{
	return "void";
}

template<typename Result, typename... Args> std::string resolve_func_type(Result(*)(Args...))
{
	return resolve<Result>() + " " + resolve<Args...>();
}

void foo(int, float)
{

}

int main()
{
	printf("%s\n", resolve<int, float>().c_str());
	printf("%s\n", resolve_func_type(foo).c_str());

	return 0;
}
	#include <stdio.h>
	#include <string>

	template<typename Arg> const char* type_to_str();

	template<typename...> struct VarIterator;

	template<typename Head> struct VarIterator<Head>
	{
	static std::string eval()
	{
	return type_to_str<Head>();
	};
	};

	template<typename Head, typename... Rest> struct VarIterator<Head, Rest...>
	{
	static std::string eval()
	{
	return VarIterator<Head>::eval() + ";" + VarIterator<Rest...>::eval();
	}
	};

	template<typename... Args> std::string resolve()
	{
	return VarIterator<Args...>::eval();
	};

	template<> const char* type_to_str<int>()
	{
	return "int";
	}

	template<> const char* type_to_str<float>()
	{
	return "float";
	}

	template<> const char* type_to_str<void>()
	{
	return "void";
	}

	template<typename Result, typename... Args> std::string resolve_func_type(Result(*)(Args...))
	{
	return resolve<Result>() + " " + resolve<Args...>();
	}

	void foo(int, float)
	{

	}

	int main()
	{
	printf("%s\n", resolve<int, float>().c_str());
	printf("%s\n", resolve_func_type(foo).c_str());

	return 0;
	}