Way to do a yield statement in C++.

yield.cpp

#include <iostream>

// clang++ -Wno-c++11-extensions yield.cpp;./a.out 

class range {

    private:
        int last;
        int iter;
        bool finished;

    public:
        range(int end): last(end),
                        iter(0),
                        finished(false){
        }

        // Iterable functions
        const range& begin() const { return *this; }
        const range& end() const { return *this; }

        // Iterator functions
        bool operator!=(const range&) const { return finished; }
        
        void operator++(){ 
            if (iter >= last){ finished = true; }
            ++iter;
        }
        
        int operator*() const { return iter; }
};



int main() {

    for (int i: range(10)){
        std::cout << i << std::endl;
    }
    return 0;
}