Check.cpp

Check.cpp

#include <iostream>
#include <functional>

class P
    {
    public:
        std::function<void(int)> check = [this](int a)
            {
            std::cout << "Check 1: " << a << "\n";
            check = [this](int a)
                {
                std::cout << "Check 2: " << a << "\n";
                };
            };
    };

int main()
    {
    P p;
    p.check (10);
    p.check (20);
    }