Captures.cpp

//
//
// g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.69.0/gcc-8.3.0/include -std=c++17 
//
//

#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

int main() {

    int x = 1, y = 1;    
        
    std::cout << x << " " << y << std::endl;
    
    auto func1 = [&x, &y]() { cout << ++x << " " << ++y << endl; };
    func1();        
           

    auto func2 = [=]() mutable{ cout << ++x << " " << endl;  };
    func2();        
    
    auto func3 = [&]() mutable{ cout << ++x << " " << endl; };
    func3();            
    
    auto func4 = [x, &y]()mutable { cout << ++x << " " << ++y << endl; };
    func4();         
}