Can I use a lambda function or std::function object in place of a function pointer?

Question

I\'ve got a library that I need to use that defines the following:

typedef void CallbackFunction(const int& i);

and has a function to regis

Answer 1

Short Answer: No

Long Answer:

Lamda's are just syntactic sugar for functors.
Functors are objects that act like functions.

A function pointer is not the same type of thing. In general you can not use functors where you need a function pointer.

Extra:

On the other hand it is easy to wrap a function to become a functor.

Historically:

Function pointers are generally used by C libraries. As C++ libraries will use an interface to achieve the same affect. Thus you can see why it is hard to pass functors where a function pointer is requried (the C code has no way to understand how to use the functor).