---
name: "std::bitset_reference"
section: "3cxx"
platform: "linux"
package: "libstdc++-12-doc"
version: "12.4.0-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/std::bitset_reference/3cxx"
---

# std::bitset\_reference(3cxx)

## NAME

std::bitset\< \_Nb \>::reference

## SYNOPSIS

`#include <bitset>`

### Public Member Functions

**reference** (**bitset** &\_\_b, size\_t **\_\_pos**) noexcept\
 **reference** (const **reference** &)=**default**\
 **reference** & **flip** () noexcept\
 **operator bool** () const noexcept\
 **reference** & **operator=** (bool \_\_x) noexcept\
 **reference** & **operator=** (const **reference** &\_\_j) noexcept\
 bool **operator~** () const noexcept\

### Friends

**class** **bitset**\

## Detailed Description

### template\<size\_t \_Nb\>

class std::bitset\< \_Nb \>::reference"This encapsulates the concept of a single bit. An instance of this class is a proxy for an actual bit; this way the individual bit operations are done as faster word-size bitwise instructions.

Most users will never need to use this class directly; conversions to and from bool are automatic and should be transparent. Overloaded operators help to preserve the illusion.

(On a typical system, this *bit reference* is 64 times the size of an actual bit. Ha.)

## Author

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