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  1. #include <iostream>
  2. #include <algorithm>
  3.  
  4. struct nur_zum_testen_t {} nur_zum_testen;
  5.  
  6. template <typename T>
  7. class List {
  8.   T * items;
  9.   int size, capacity;
  10.  public:
  11.   List(const List& list);
  12.  ~List() { delete[] items; }
  13.  
  14.   List(nur_zum_testen_t, T *items, int size, int capacity)
  15.     : items(items), size(size), capacity(capacity) {}
  16. };
  17.  
  18. template <class T> 
  19. List<T>::List(const List& list) : 
  20.     capacity(list.capacity), 
  21.     items(new T[list.capacity]), 
  22.     size(list.size)
  23. { 
  24.     try
  25.     {
  26.         std::copy( list.items, list.items + size, items ); 
  27.     }
  28.     catch(...)
  29.     {
  30.         delete [] items;
  31.         throw;
  32.     }
  33. }
  34.  
  35. int instances;
  36. struct doofsinn {
  37.   doofsinn() { ++instances; }
  38.   ~doofsinn() { --instances; }
  39.   doofsinn& operator=(doofsinn const&) {
  40.     static int doofsinn_counter = 0;
  41.     if (++doofsinn_counter % 5 == 0)
  42.       throw "Sone";
  43.   }
  44. };
  45.  
  46. int main()
  47. {
  48.   {
  49.     List<doofsinn> l(nur_zum_testen, new doofsinn[10] (), 10, 10);
  50.     try { List<doofsinn> l2(l); } catch(...) {}
  51.   }
  52.   std::cout << instances << " instances still out there ...\n";
  53. }
  54.  
Success #stdin #stdout 0s 3028KB
comments (?)
stdin 
Standard input is empty
stdout 
0 instances still out there ...
https://ideone.com/dWDpzF
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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