lua_tinker call with variadic templates (Visual Studio 2013)

lua_tinker.h

#if _MSC_VER >= 1800
	template<typename T, typename ... TArgs>
	void push(lua_State *L, T ret, const TArgs& ... args) { push(L, ret); push(L, args...); }

	template<typename RVal, typename ... TArgs>
	RVal call(lua_State* L, const char* name, const TArgs&... args)
	{
		lua_pushcclosure(L, on_error, 0);
		int errfunc = lua_gettop(L);

		lua_getglobal(L, name);
		if (lua_isfunction(L, -1))
		{
			push(L, args...);

			if (lua_pcall(L, sizeof...(args), 1, errfunc) != 0)
			{
				lua_pop(L, 1);
			}
		}
		else
		{
			print_error(L, "lua_tinker::call() attempt to call global `%s' (not a function)", name);
		}

		lua_remove(L, -2);
		return pop<RVal>(L);
	}
#endif

Lua

function lua_func(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12)
  return arg1 + arg2 + arg3 + arg4 + arg5 + arg6 + arg7 + arg8 + arg9 + arg10 + arg11 + arg12
end

C++

int result = lua_tinker::call<int>(L, "lua_func", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);

Result is 78.