C++ delete

delete

• 함수를 사용하지 못하도록 막는 역할을 하는 키워드이다.

  #include <iostream>
  #include <cassert>
  
  class Fraction
  {
    int    numerator_;
    int    denominator_;
  
  public:
    Fraction(char) = delete;
  
    explicit Fraction(int num = 0, int den = 1)
      : numerator_(num), denominator_(den)
    {
      std::cout << "Default constructor" << std::endl;
      assert(den != 0);
    }
  
    Fraction(const Fraction& fraction)
      : numerator_(fraction.numerator_), denominator_(fraction.denominator_)
    {
      std::cout << "Copy constructor called" << std::endl;
    }
  
    friend std::ostream& operator << (std::ostream& out, const Fraction& f)
    {
      out << f.numerator_ << " / " << f.denominator_;
      return (out);
    }
  };
  
  void    doSomething(Fraction frac)
  {
    std::cout << frac << std::endl;
  }
  
  int        main()
  {
    using namespace std;
  
    Fraction frac('c');  // 에러
  }

  • 빌드하면 아래와 같은 에러가 발생한다.

    error C2280: 'Fraction::Fraction(char)': attempting to reference a deleted function