std::bit_not (3) - Linux Manuals

std::bit_not: std::bit_not


std::bit_not - std::bit_not


Defined in header <functional>
template< class T = void > (since C++14)
struct bit_not;

Function object for performing bitwise NOT. Effectively calls operator~ on type T.


The standard library provides a specialization of std::bit_not when T is not specified, which leaves the parameter types and return type to be deduced.

              function object implementing ~x deducing argument and return types
bit_not<void> (class template specialization)

Member types

                                              (until C++20)
Type Definition
result_type(deprecated in C++17) T
argument_type(deprecated in C++17) T

Member functions

           returns the result of bitwise NOT of its argument
operator() (public member function)


constexpr T operator()( const T& arg ) const;

Returns the result of bitwise NOT of arg.


arg - value to compute bitwise NOT of

Return value

The result of ~arg.



Possible implementation

  constexpr T operator()(const T& arg) const
      return ~arg;