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  1. #include <iostream>
  2.  
  3. class A
  4. {
  5. public:
  6.     A( int a ) : a(a) { }
  7.     A operator&&( const A& a )
  8.     {
  9.         std::cout << "operator &&" << std::endl;
  10.         return *this;
  11.     } 
  12.  
  13.     operator bool()
  14.     {
  15.         std::cout << "operator bool : " << a << std::endl;
  16.         return false;
  17.     }
  18.  
  19.     A& operator()() 
  20.     { 
  21.         std::cout << "operator () : " << a << std::endl;
  22.         return *this; 
  23.     }
  24. private:
  25.     const int a;
  26. };
  27.  
  28. int main() {
  29.  
  30.     A a1(1), a2(2), a3(3);
  31.  
  32.     if( a1() && a2() && a3() )
  33.     {
  34.  
  35.     }
  36.  
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 2896KB
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stdin
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Standard input is empty
stdout
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operator () : 3
operator () : 2
operator () : 1
operator &&
operator &&
operator bool : 1
https://ideone.com/YdbmM6
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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