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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7. struct A_s {
  8.     unsigned int l;
  9.     int *arr;
  10.  
  11.     A_s(unsigned int size) : l(size), arr(new int[size])
  12.     {
  13.         cout<< "\t con addr: " << this << " Arr: " << arr <<endl;
  14.     }
  15.     A_s(const A_s &) = delete; // cannot copy
  16.     A_s& operator=(const A_s &) = delete; // cannot assign
  17.  
  18.     A_s(A_s && src): l(src.l), arr(src.arr)
  19.     {
  20.         cout << "\t mov addr: " << this << " Arr: " << arr << " from " << &src <<endl;
  21.         src.arr = nullptr;
  22.         src.l = 0;
  23.     }
  24.     A_s& operator=(A_s && src)
  25.     {
  26.         std::swap(arr, src.arr);
  27.         std::swap(l, src.l);
  28.         cout << "\t ass addr: " << this << " Arr: " << arr << " from " << &src <<endl;
  29.         return *this;
  30.     }
  31.     ~A_s() {
  32.         if (arr != nullptr)
  33.         {
  34.             cout << "\t des addr: " << this << " Arr: " << arr << endl;
  35.         }
  36.         delete[] arr;               // works if line is removed
  37.     }
  38. };
  39.  
  40. vector<A_s> vec;
  41.  
  42. int main() {
  43.     cout<<"vec 0"<<endl;
  44.     vec.emplace_back(1);
  45.  
  46.     cout<<"vec 1"<<endl;
  47.     vec.emplace_back(1);
  48.  
  49.     cout<<"vec 2"<<endl;
  50.     vec.emplace_back(1);
  51.  
  52.     cout<<"vec 3"<<endl;
  53.     vec.emplace_back(1);
  54.  
  55.     cout<<"Remove vec 1"<<endl;
  56.     vec.erase(vec.begin());
  57.  
  58.     for(unsigned int i = 0; i < vec.size(); i++)
  59.     cout<< "addr: " << &vec[i] << " Arr: " << vec[i].arr <<endl;
  60.  
  61.     cout<<"end"<<endl;
  62.     return 0;
  63. }
  64.  
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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Standard input is empty
stdout
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vec 0
	 con addr: 0x55b6006dfc30 Arr: 0x55b6006dfc50
vec 1
	 con addr: 0x55b6006dfc80 Arr: 0x55b6006dfca0
	 mov addr: 0x55b6006dfc70 Arr: 0x55b6006dfc50 from 0x55b6006dfc30
vec 2
	 con addr: 0x55b6006dfce0 Arr: 0x55b6006dfc30
	 mov addr: 0x55b6006dfcc0 Arr: 0x55b6006dfc50 from 0x55b6006dfc70
	 mov addr: 0x55b6006dfcd0 Arr: 0x55b6006dfca0 from 0x55b6006dfc80
vec 3
	 con addr: 0x55b6006dfcf0 Arr: 0x55b6006dfd10
Remove vec 1
	 ass addr: 0x55b6006dfcc0 Arr: 0x55b6006dfca0 from 0x55b6006dfcd0
	 ass addr: 0x55b6006dfcd0 Arr: 0x55b6006dfc30 from 0x55b6006dfce0
	 ass addr: 0x55b6006dfce0 Arr: 0x55b6006dfd10 from 0x55b6006dfcf0
	 des addr: 0x55b6006dfcf0 Arr: 0x55b6006dfc50
addr: 0x55b6006dfcc0 Arr: 0x55b6006dfca0
addr: 0x55b6006dfcd0 Arr: 0x55b6006dfc30
addr: 0x55b6006dfce0 Arr: 0x55b6006dfd10
end
	 des addr: 0x55b6006dfcc0 Arr: 0x55b6006dfca0
	 des addr: 0x55b6006dfcd0 Arr: 0x55b6006dfc30
	 des addr: 0x55b6006dfce0 Arr: 0x55b6006dfd10
https://ideone.com/hxe8PV
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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