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  1. #include <iostream>
  2. #include <map>
  3. #include <string>
  4.  
  5. struct A {
  6.         virtual ~A(){}
  7. };
  8.  
  9. struct B : A
  10. {
  11.         B()
  12.         {
  13.                 std::cout << "B constructed\n";
  14.         }
  15.  
  16.         virtual ~B()
  17.         {
  18.                 std::cout << "B destructed\n";
  19.         }
  20. };
  21.  
  22. struct C : A
  23. {
  24.         C()
  25.         {
  26.                 std::cout << "C constructed\n";
  27.         }
  28.  
  29.         virtual ~C()
  30.         {
  31.                 std::cout << "C destructed\n";
  32.         }
  33. };
  34.  
  35. template <class T>
  36. A* create()
  37. {
  38.         return new T;
  39. }
  40.  
  41. typedef A*(*CreateFN)();
  42.  
  43.  
  44. int main()
  45. {
  46.         std::map<std::string, CreateFN> classMap;
  47.         classMap["B"] = &create<B>;
  48.         classMap["C"] = &create<C>;
  49.  
  50.         delete classMap["B"]();
  51.         delete classMap["C"]();
  52. }
  53.  
Success #stdin #stdout 0.02s 2820KB
comments (?)
stdin
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Standard input is empty
stdout
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B constructed
B destructed
C constructed
C destructed
https://ideone.com/QhKPkR
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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