How to pass a callback function (with arguments) as a parameter of another function

[hashbrown]

I know how to pass a callback function as a parameter of a class constructor function, and store its reference in the class...
(hope that made sense)

public:
	using Callback = void();

	Game (std::vector<GameObject> &gameObjects,
		  Callback &updateCB): m_gameObjects(gameObjects), m_gameUpdate(updateCB) {
		// Game Setup
	}

private:
        std::vector<GameObject> &m_gameObjects;

	// Callbacks
	Callback &m_gameUpdate;

...but I'm trying to find out how to pass a callback function that expects 1 or more arguments:

void someCallback(int a); 

I asked a related question a few days ago, and using templates was suggested for more flexibility, but if I change "using Callback = void();" for "template<typename func_type>", I get a compiler error:

'Callback' does not name a type // Can't find it, i did something wrong. 

I put the template definition right below the public keyword, maybe I'm using it wrong or placing it in the incorrect place, and is there any other way to accomplish this?

[kevinkjt2000]

You may be interested in std::function from <functional> http://en.cppreference.com/w/cpp/utility/functional/function

[cire]

Don't store an alias to the callback, store a copy.

Suppose you get this working. m_gameUpdate takes an arbitrary number of parameters. How do you expect to call it? How are you going to decide what arguments to feed it?

[hashbrown]

Thanks Cire and Kevin for your answers. I got a better understanding now.