C++

参考

<bitset>

bitset

public member class
<bitset>

std::bitset::reference

class reference;
类引用类型
此嵌入类是当应用于非 const 限定 bitset 对象时由 bitset::operator[] 返回的类型。它通过模拟对 bool 的引用的接口来访问单个位。

其原型是
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class bitset::reference {
  friend class bitset;
  reference();                                        // no public constructor
public:
  ~reference();
  operator bool() const;                              // convert to bool
  reference& operator= (bool x);                      // assign bool
  reference& operator= (const reference& x);          // assign bit
  reference& flip();                                  // flip bit value
  bool operator~() const;                             // return inverse value
}
 
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class bitset::reference {
  friend class bitset;
  reference() noexcept;                               // no public constructor
public:
  ~reference();
  operator bool() const noexcept;                     // convert to bool
  reference& operator= (bool x) noexcept;             // assign bool
  reference& operator= (const reference& x) noexcept; // assign bit
  reference& flip() noexcept;                         // flip bit value
  bool operator~() const noexcept;                    // return inverse value
}