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  1. #include <iostream>
  2.  
  3. template<typename T>
  4. class RAIIpointer
  5. {
  6. private:
  7.     T* _raw_pointer;
  8. public:
  9.     explicit RAIIpointer(T* managed): _raw_pointer(managed)
  10.     {
  11.         std::cout << "\t\tAllocating memory for single object\n";
  12.     }
  13.     ~RAIIpointer()
  14.     {
  15.         std::cout << "\t\tReleasing memory for single object\n";
  16.         delete _raw_pointer;
  17.     }
  18. };
  19.  
  20. template<typename T>
  21. class RAIIpointer<T[]> // array specialization
  22. {
  23. private:
  24.     T* _raw_pointer;
  25. public:
  26.     explicit RAIIpointer(T* managed): _raw_pointer(managed)
  27.     {
  28.         std::cout << "\t\tAllocating memory for array\n";
  29.     }
  30.     ~RAIIpointer()
  31.     {
  32.         std::cout << "\t\tReleasing memory for array\n";
  33.         delete[] _raw_pointer;
  34.     }
  35. };
  36.  
  37. int main()
  38. {
  39.     std::cout << "Before entering RAII scope\n";
  40.     {
  41.         std::cout << "\tCreating a smart pointer...\n";
  42.         RAIIpointer<int> smart_ptr(new int); // that's it, automatic release when scope ends
  43.         RAIIpointer<int[]> smart_ptr_arr(new int[42]); // same
  44.         std::cout << "\tDone with it\n";
  45.     }
  46.     std::cout << "After exiting RAII scope\n";
  47. }
Success #stdin #stdout 0s 3272KB
comments (?)
stdin 
Standard input is empty
stdout 
Before entering RAII scope
	Creating a smart pointer...
		Allocating memory for single object
		Allocating memory for array
	Done with it
		Releasing memory for array
		Releasing memory for single object
After exiting RAII scope
https://ideone.com/aBhAiK
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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