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  1. class A {
  2.  public:
  3.   class B {public: bool value;};
  4.  
  5.   A() {}
  6.   B b_;
  7.  protected:
  8.   void DoStuff(B& b) { return DoStuffImpl(b); }
  9.  private:
  10.   virtual void DoStuffImpl(B& b) = 0;
  11. };
  12.  
  13. class X : public A {
  14.  public:
  15.   X() {}
  16.   void Trigger();
  17.  private:
  18.   virtual void DoStuffImpl(B& b);
  19. };
  20.  
  21. void X::Trigger() {
  22.     DoStuff(b_);
  23. }
  24. void X::DoStuffImpl(B& b) {
  25.     b.value = true;
  26. }
  27.  
  28. int main(){
  29.     X x;
  30.     x.Trigger();
  31.     return x.b_.value;
  32. }
Runtime error #stdin #stdout 0.02s 2676KB
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https://ideone.com/HBAqQO
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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