make move iterator

make_move_iterator.cpp

#include <iostream>
#include <vector>

struct Point {
    int x;
    
    Point(int x)
    : x(x)
    {
    }
};

int main(int argc, const char * argv[]) {
    
    std::vector<std::unique_ptr<Point>> v;
   
    for (int i = 0; i < 5; ++i) {
        v.push_back(std::make_unique<Point>(i));
    }
    
    auto it = v.begin() + 2;
    it = v.erase(it);
    
    std::vector<std::unique_ptr<Point>> v2;
    v2.assign(std::make_move_iterator(v.begin()),
              std::make_move_iterator(v.end()));
    
    for (const auto& pt: v) {
        if (pt) {
            printf("%d\n", pt->x);
        } else {
            printf("empty\n");
        }
    }
    
    return 0;
}