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  1. #include <typeinfo>
  2. #include <string>
  3. #include <map>
  4. #include <iostream>
  5.  
  6. template< typename T >
  7. class declare_type
  8. {
  9.     static int n;
  10. };
  11.  
  12.  
  13. struct GenericClassFactory
  14. {
  15.     ~GenericClassFactory() {};
  16.     virtual void* create( const std::string& rstrClassName ) = 0;
  17. };
  18.  
  19. template <typename T>
  20. struct ClassFactory : public GenericClassFactory
  21. {
  22.     virtual void* create( const std::string& rstrClassName )
  23.     {
  24.         return new T();
  25.     }
  26. };
  27.  
  28. class ClassRegister
  29. {
  30. public:
  31.     virtual ~ClassRegister()
  32.     { // ...
  33.     }
  34.  
  35.     template< typename T >
  36.     static int declare( const std::string& rstrClassName = typeid(T).name() )
  37.     {
  38.     	std::cout << "ClassRegister::declare( " << rstrClassName << " )\n";
  39.     	return 42;
  40.     }
  41.  
  42.     static void create( const std::string& rstrClassName )
  43.     {
  44.     	std::cout << "ClassRegister::create( " << rstrClassName << " )\n";
  45.     }
  46.  
  47. private:
  48. };
  49.  
  50. template< typename T >
  51. int declare_type<T>::n = ClassRegister::declare<T>();
  52.  
  53.  
  54. template< typename T > 
  55. class BaseClass
  56. {
  57.     declare_type<T> m_declaration;
  58. };
  59.  
  60. class SomeClass : public BaseClass<SomeClass>
  61. {
  62. public:
  63.     void meow();
  64. };
  65.  
  66. //template class declare_type<SomeClass>;
  67.  
  68. int main( void )
  69. {
  70. 	ClassRegister::create( "9SomeClass" );
  71.  
  72. 	return 0;
  73. }
Success #stdin #stdout 0s 3472KB
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ClassRegister::create( 9SomeClass )
https://ideone.com/ZMSSJW
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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