How do I use std::function in C++?

How do I use std::function in C++?

std::function is a versatile wrapper for callable objects. It can store functions, lambda expressions, and bind expressions.

Can you give me an example of how to declare and use it?

Sure! You can declare it like this: std::function<int(int, int)> add = [](int a, int b) { return a + b; }; Then call it with add(2, 3);.

What are the advantages of using std::function?

It provides type safety, can store any callable type, and simplifies passing functions as parameters.

Are there any performance considerations I should be aware of?

Yes, std::function can have some overhead compared to using function pointers or templates, especially in performance-critical code.