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  1. #include <iostream>    
  2.     #include <vector>
  3.  
  4.     class A{
  5.     public:
  6.         A(int i){
  7.             std::cout << "Constructor "<< i <<std::endl;
  8.             for(int l = 0; l<i;l++){
  9.                 vec.push_back(l);
  10.             }
  11.         };
  12.  
  13.         A(A && ref): vec(std::move(ref.vec))
  14.         {
  15.            std::cout << "Move constructor"<<std::endl;
  16.         }
  17.  
  18.         A & operator=(A && ref){
  19.            if(this != &ref){
  20.                 vec = std::move(ref.vec);
  21.            }
  22.            std::cout << "Move assignment"<<std::endl;
  23.            return *this;
  24.  
  25.         }
  26.  
  27.         std::vector<int> vec;
  28.  
  29.     private:
  30.         A(const A & ref);
  31.         A(A & ref);
  32.         A & operator=(A & ref);
  33.     };
  34.  
  35.  
  36.     A makeA(){
  37.         A a(3);
  38.         return a;
  39.     }
  40.  
  41.     int main(){
  42.         A b1(makeA()) ;
  43.         A b2 = makeA();
  44.         A b3 = A(3);
  45.         A b4(A(3));
  46.         std::cout << b4.vec[2] << std::endl;
  47.     };
Success #stdin #stdout 0s 3476KB
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Constructor 3
Constructor 3
Constructor 3
Constructor 3
2
https://ideone.com/bZPnyY
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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