std::function in C++

std::function is a versatile class template in the C++ Standard Library that can store and invoke callable objects, such as functions, lambdas, or functors. It provides a flexible way to work with different types of callables in a uniform manner.

Here's a simple example:


#include <functional> // Include for std::function

void myFunction() {
    std::cout << "Hello, World!" << std::endl;
}

int main() {
    std::function<void()> func = myFunction;
    func(); // Output: Hello, World!
    return 0;
}

std::function is particularly useful when you need to pass functions or callbacks as arguments to other functions or store them for later use.