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  1. #include <iostream>
  2. #include <map>
  3. using namespace std;
  4.  
  5.  
  6.  
  7. class base {
  8.  
  9.    protected:
  10.      typedef void (base::*fn)() ;
  11.      base(){
  12.      fn_arr["foo"]=&base::foo;  
  13.      }  
  14.      void foo()  {
  15.         cout << "i'm foo" << endl;
  16.      }
  17.  
  18.    public:
  19.      map<std::string, fn> fn_arr;
  20. };
  21.  
  22. class derived : public base {
  23.  
  24.    protected:
  25.       void bar() {
  26.           cout <<"i'm bar" << endl;
  27.       }
  28.  
  29.    public:
  30.       derived() {
  31.           fn_arr["bar"]=static_cast<fn>(&derived::bar);  
  32.       }
  33. };
  34.  
  35. int main() {
  36. 	derived d;
  37. 	void (derived::*fn)()=d.fn_arr["foo"];
  38. 	(d.*fn)();
  39. 	void (derived::*fn_)()=d.fn_arr["bar"];
  40. 	(d.*fn_)();
  41. 	return 0;
  42. }
Success #stdin #stdout 0s 4368KB
comments (?)
stdin
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Standard input is empty
stdout
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i'm foo
i'm bar
https://ideone.com/7IN9Um
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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