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  1. #include <iostream>
  2.  
  3. struct Base
  4. {
  5.     void f() const
  6.     {
  7.         pre_f();
  8.         std::cout << "f() stuff\n";
  9.         post_f();
  10.     }
  11.  
  12.     virtual ~Base() {}
  13.  
  14. private:
  15.     virtual void pre_f() const = 0;
  16.     virtual void post_f() const = 0;
  17. };
  18.  
  19. struct Derived : Base
  20. {
  21. private:
  22.     virtual void pre_f() const override
  23.     {
  24.         std::cout << "pre f() stuff\n";
  25.     }
  26.  
  27.     virtual void post_f() const override
  28.     {
  29.         std::cout << "post f() stuff\n";
  30.     }
  31. };
  32.  
  33. int main()
  34. {
  35.     Derived d;
  36.     d.f();
  37. }
Success #stdin #stdout 0s 2896KB
comments (?)
stdin
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Standard input is empty
stdout
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pre f() stuff
f() stuff
post f() stuff
https://ideone.com/UZ1Fid
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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