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  1. #include <stdio.h>
  2. #include <stdint.h>
  3.  
  4. class A
  5. {
  6. public:
  7.     A()
  8.     {
  9.         myCtr = ++ctr;
  10.         printf("class A default Constructor - object id: %u\n", myCtr);
  11.     }
  12.  
  13.     A(const A &a2) {
  14.         myCtr = ++ctr;
  15.         printf("class A copy constructor - object id: %u\n", myCtr);
  16.  
  17.     }
  18.  
  19.     A(A &&a2) {
  20.         myCtr = a2.myCtr;
  21.         a2.myCtr = 0;
  22.  
  23.         printf("class A move constructor - object id: %u\n", myCtr);
  24.  
  25.     }
  26.  
  27.     A & operator=(const A &a2) {
  28.         myCtr = ++ctr;
  29.  
  30.         printf("class A copy assignment - from object id: %u - to object id: %u\n", a2.myCtr, myCtr);
  31.  
  32.         return *this;
  33.     }
  34.  
  35.     A & operator=(A &&a2) {
  36.         printf("class A move assignment - from object id: %u - to object id: %u\n", a2.myCtr, myCtr);
  37.  
  38.         if (this != &a2) {
  39.             //myCtr = a2.myCtr;
  40.             //a2.myCtr = 0;
  41.         }
  42.  
  43.         return *this;
  44.     }
  45.  
  46.     ~A()
  47.     {
  48.         printf("class A destructor - object id: %u\n", myCtr);
  49.     }
  50.  
  51. private:
  52.     uint64_t myCtr;
  53.     static uint64_t ctr;
  54. };
  55.  
  56. class B
  57. {
  58. public:
  59.     B() {
  60.  
  61.     }
  62.  
  63.     B(char * input, uint32_t len) {
  64.         for (uint32_t i = 0; i < len; i++)
  65.         {
  66.             /* do something */
  67.         }
  68.     }
  69.  
  70.     B(const B &b2) : characters(b2.characters)
  71.     {
  72.     }
  73.  
  74.     B(B &&b2) {
  75.         characters = A(b2.characters);
  76.     }
  77.  
  78.     B & operator=(const B &b2) {
  79.         characters = A(b2.characters);
  80.     }
  81.  
  82.     B & operator=(B &&b2) {
  83.         characters = A(b2.characters);
  84.     }
  85.  
  86.     ~B() {
  87.  
  88.     }
  89.  
  90.  
  91. private:
  92.     A characters;
  93. };
  94.  
  95. uint64_t A::ctr = 0;
  96.  
  97. int main(int argc, char *argv[]) {
  98.     B b1 = B((char *)"b1", 2);
  99.     B b2 = b1;
  100.  
  101.     return 0;
  102. }
Success #stdin #stdout 0s 4372KB
comments (?)
stdin 
Standard input is empty
stdout 
class A default Constructor - object id: 1
class A copy constructor - object id: 2
class A destructor - object id: 2
class A destructor - object id: 1
https://ideone.com/yqvINu
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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