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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. class Serializable {
  6. public:
  7.     virtual  bool eq( const string & qs) const = 0;
  8.     virtual  bool eq( const Serializable * o) const = 0;
  9. };
  10.  
  11. class JSONSerializable : virtual public Serializable {
  12. public:
  13.     virtual  string toJSON( void) const = 0;
  14.  
  15.     virtual  bool eq( const string & qs) const {
  16.                  return toJSON() == qs;
  17.              }
  18.     virtual  bool eq( const Serializable * o) const {
  19.                  return eq(dynamic_cast<const JSONSerializable*>(o)->toJSON());
  20.              }
  21. };
  22.  
  23. class A : virtual public Serializable {  };
  24.  
  25. class B : virtual public A,
  26.           public JSONSerializable {
  27. public:
  28.     virtual  string toJSON( void) const {
  29.                  return string( "test!");
  30.              }
  31. };
  32.  
  33.  
  34. int main() {
  35. 	B b;
  36. 	return 0;
  37. }
Success #stdin #stdout 0s 3292KB
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https://ideone.com/4QrAbt
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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