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      std::bit_and

      From cppreference.com
      <cpp‎ |utility‎ |functional
       
       
      Utilities library
       
      Function objects
      Function invocation
      (C++17)(C++23)
      Identity function object
      (C++20)
      Old binders and adaptors
      (until C++17*)
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      Defined in header<functional>
      template<class T>
      struct bit_and;
      		(until C++14)
      template<class T=void>
      struct bit_and;
      		(since C++14)

      Function object for performing bitwise AND. Effectively callsoperator& on typeT.

      Contents

      [edit]Specializations

      The standard library provides a specialization ofstd::bit_and whenT is not specified, which leaves the parameter types and return type to be deduced.

      function object implementingx& y deducing parameter and return types
      (class template specialization)[edit]
      		(since C++14)

      [edit]Member types

      Type Definition
      result_type(deprecated in C++17)(removed in C++20)T
      first_argument_type(deprecated in C++17)(removed in C++20)T
      second_argument_type(deprecated in C++17)(removed in C++20)T

      These member types are obtained via publicly inheritingstd::binary_function<T, T, T>.

      		(until C++11)

      [edit]Member functions

      operator()
      		 returns the result of bitwise AND of two arguments
      (public member function)

      std::bit_and::operator()

      T operator()(const T& lhs,const T& rhs)const;
      		(constexpr since C++14)

      Returns the result of bitwise AND oflhs andrhs.

      Parameters

      lhs, rhs - values to compute bitwise AND of

      Return value

      The result oflhs& rhs.

      [edit]Exceptions

      May throw implementation-defined exceptions.

      Possible implementation

      constexpr T operator()(const T& lhs,const T& rhs)const{return lhs& rhs;}

      [edit]Defect reports

      The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

      DRApplied toBehavior as publishedCorrect behavior
      LWG 660C++98function objects for bitwise operations are missingadded
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