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Apache C++ Standard Library Reference Guide

bitset

Library:  Containers


Does not inherit

Local Index

Members

Summary

A class template and related functions for storing and manipulating fixed-size sequences of bits

Synopsis

#include <bitset>

namespace std {
  template <size_t N>
  class bitset;
}

Description

bitset is a class that describes objects that can store a sequence consisting of a fixed number of bits, N. Each bit represents either the value zero (reset) or one (set) and has a non-negative position pos.

Errors and Exceptions

Bitset constructors and member functions may throw the following exceptions:

If exceptions are not supported on your compiler, you get an assertion failure instead of an exception.

Interface

Constructors

bitset();
bitset(unsigned long val);
template<class charT, class traits, class Allocator>
explicit
bitset (const basic_string<charT, traits, Allocator>, 
        typename basic_string<charT, traits,
                              Allocator>::size_type=0, 
        typename basic_string<charT, traits,
                              Allocator>::size_type=
        basic_string<charT, traits, Allocator>::npos);
bitset(const bitset<N>& rhs);

Assignment Operators

bitset<N>& 
operator=(const bitset<N>& rhs);

Operators

bool 
operator==(const bitset<N>& rhs) const;
bool 
operator!=(const bitset<N>& rhs) const;
bitset<N>& 
operator&=(const bitset<N>& rhs);
bitset<N>& 
operator|=(const bitset<N>& rhs);
bitset<N>&
operator^=(const bitset<N>& rhs);
bitset<N>& 
operator<<=(size_t pos);
bitset<N>& 
operator>>=(size_t pos);
bitset<N>&
operator>>(size_t pos) const;
bitset<N>& 
operator<<(size_t pos) const;
bitset<N> 
operator~() const;
bitset<N> 
operator&(const bitset<N>& lhs,
          const bitset<N>& rhs);
bitset<N> 
operator|(const bitset<N>& lhs,
          const bitset<N>& rhs);
bitset<N> 
operator^(const bitset<N>& lhs,
          const bitset<N>& rhs);
template <size_t N>
basic_istream<charT, traits>m& 
operator>>(basic_istream<charT, traits>& is, bitset<N>& x);
template <size_t N>
basic_ostream<charT, traits>& 
operator<<(basic_ostream<charT, traits>& os, const bitset<N>& x);

Member Functions

bool 
any() const;
size_t 
count() const;
bitset<N>& 
flip();
bitset<N>& 
flip(size_t pos);
bool 
none() const;
bitset<N>& 
reset();
bitset<N>& 
reset(size_t pos);
bitset<N>& 
set();
bitset<N>& 
set(size_t pos, bool val = true);
size_t 
size() const;
bool 
test(size_t pos) const;
unsigned long 
to_ulong() const;

Example

00000101

See Also

Containers

Standards Conformance

ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 23.3.5



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