[bitset.operators]

# 22 General utilities library [[utilities]](./#utilities)

## 22.9 Bitsets [[bitset]](bitset#operators)

### 22.9.4 bitset operators [bitset.operators]

[🔗](#lib:operator&,bitset)

`template<size_t N>
  constexpr bitset<N> operator&(const bitset<N>& lhs, const bitset<N>& rhs) noexcept;
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L11121)

*Returns*: bitset<N>(lhs) &= rhs[.](#1.sentence-1)

[🔗](#lib:operator%7c,bitset)

`template<size_t N>
  constexpr bitset<N> operator|(const bitset<N>& lhs, const bitset<N>& rhs) noexcept;
`

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L11133)

*Returns*: bitset<N>(lhs) |= rhs[.](#2.sentence-1)

[🔗](#lib:operator%5e,bitset)

`template<size_t N>
  constexpr bitset<N> operator^(const bitset<N>& lhs, const bitset<N>& rhs) noexcept;
`

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L11145)

*Returns*: bitset<N>(lhs) ^= rhs[.](#3.sentence-1)

[🔗](#lib:operator%3e%3e,bitset)

`template<class charT, class traits, size_t N>
  basic_istream<charT, traits>&
    operator>>(basic_istream<charT, traits>& is, bitset<N>& x);
`

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L11158)

A formatted input function ([[istream.formatted]](istream.formatted "31.7.5.3 Formatted input functions"))[.](#4.sentence-1)

[5](#5)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L11161)

*Effects*: Extracts up to N characters from is[.](#5.sentence-1)

Stores these characters in a temporary object str of typebasic_string<charT, traits>,
then evaluates the expressionx = bitset<N>(str)[.](#5.sentence-2)

Characters are extracted and stored until any of the following occurs:

- [(5.1)](#5.1)

N characters have been extracted and stored;

- [(5.2)](#5.2)

end-of-file occurs on the input sequence;

- [(5.3)](#5.3)

the next input character is neitheris.widen('0') noris.widen('1') (in which case the input character is not extracted)[.](#5.sentence-3)

[6](#6)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L11183)

If N > 0 and no characters are stored in str,ios_base​::​failbit is set in the input function's local error state
before setstate is called[.](#6.sentence-1)

[7](#7)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L11188)

*Returns*: is[.](#7.sentence-1)

[🔗](#lib:operator%3c%3c,bitset)

`template<class charT, class traits, size_t N>
  basic_ostream<charT, traits>&
    operator<<(basic_ostream<charT, traits>& os, const bitset<N>& x);
`

[8](#8)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L11201)

*Returns*: os << x.template to_string<charT, traits, allocator<charT>>( use_facet<ctype<charT>>(os.getloc()).widen('0'),
 use_facet<ctype<charT>>(os.getloc()).widen('1')) (see [[ostream.formatted]](ostream.formatted "31.7.6.3 Formatted output functions"))[.](#8.sentence-1)