---
name: "std::tr2::__dynamic_bitset_base"
section: "3"
platform: "linux"
package: "gcc"
version: "16.2.1+r23+gd564253eb6c8-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/std::tr2::__dynamic_bitset_base"
---

# std::tr2::\_\_dynamic\_bitset\_base(3)

## NAME

std::tr2::\_\_dynamic\_bitset\_base\< \_WordT, \_Alloc \>

## SYNOPSIS

\#include \<dynamic\_bitset\>

Inherited by **std::tr2::dynamic\_bitset\< \_WordT, \_Alloc \>** \[private\].

### Public Types

typedef \_Alloc **allocator\_type**\
 typedef \_WordT **block\_type**\
 typedef size\_t **size\_type**\

### Public Member Functions

**\_\_dynamic\_bitset\_base** (\_\_dynamic\_bitset\_base &&\_\_b)=default\
 **\_\_dynamic\_bitset\_base** (const \_\_dynamic\_bitset\_base &)=default\
 **\_\_dynamic\_bitset\_base** (const allocator\_type &\_\_alloc)\
 **\_\_dynamic\_bitset\_base** (size\_type \_\_nbits, unsigned long long \_\_val=0ULL, const allocator\_type &\_\_alloc=allocator\_type())\
 size\_t **\_M\_are\_all\_aux** () const noexcept\
 void **\_M\_clear** () noexcept\
 void **\_M\_do\_and** (const \_\_dynamic\_bitset\_base &\_\_x) noexcept\
 void **\_M\_do\_append\_block** (block\_type \_\_block, size\_type \_\_pos)\
 size\_t **\_M\_do\_count** () const noexcept\
 void **\_M\_do\_dif** (const \_\_dynamic\_bitset\_base &\_\_x) noexcept\
 size\_type **\_M\_do\_find\_first** (size\_t \_\_not\_found) const\
 size\_type **\_M\_do\_find\_next** (size\_t \_\_prev, size\_t \_\_not\_found) const\
 void **\_M\_do\_flip** () noexcept\
 void **\_M\_do\_left\_shift** (size\_t \_\_shift)\
 void **\_M\_do\_or** (const \_\_dynamic\_bitset\_base &\_\_x) noexcept\
 void **\_M\_do\_reset** () noexcept\
 void **\_M\_do\_right\_shift** (size\_t \_\_shift)\
 void **\_M\_do\_set** () noexcept\
 unsigned long long **\_M\_do\_to\_ullong** () const\
 unsigned long **\_M\_do\_to\_ulong** () const\
 void **\_M\_do\_xor** (const \_\_dynamic\_bitset\_base &\_\_x) noexcept\
 allocator\_type **\_M\_get\_allocator** () const noexcept\
 block\_type **\_M\_getword** (size\_type \_\_pos) const noexcept\
 block\_type & **\_M\_getword** (size\_type \_\_pos) noexcept\
 block\_type **\_M\_hiword** () const noexcept\
 block\_type & **\_M\_hiword** () noexcept\
 bool **\_M\_is\_any** () const noexcept\
 bool **\_M\_is\_equal** (const \_\_dynamic\_bitset\_base &\_\_x) const noexcept\
 bool **\_M\_is\_less** (const \_\_dynamic\_bitset\_base &\_\_x) const noexcept\
 bool **\_M\_is\_proper\_subset\_of** (const \_\_dynamic\_bitset\_base &\_\_b) const noexcept\
 bool **\_M\_is\_subset\_of** (const \_\_dynamic\_bitset\_base &\_\_b) noexcept\
 void **\_M\_resize** (size\_t \_\_nbits, bool \_\_value)\
 size\_type **\_M\_size** () const noexcept\
 void **\_M\_swap** (\_\_dynamic\_bitset\_base &\_\_b) noexcept\
 \_\_dynamic\_bitset\_base & **operator=** (\_\_dynamic\_bitset\_base &&)=default\
 \_\_dynamic\_bitset\_base & **operator=** (const \_\_dynamic\_bitset\_base &)=default\

### Static Public Member Functions

static block\_type **\_S\_maskbit** (size\_type \_\_pos) noexcept\
 static size\_type **\_S\_whichbit** (size\_type \_\_pos) noexcept\
 static size\_type **\_S\_whichbyte** (size\_type \_\_pos) noexcept\
 static size\_type **\_S\_whichword** (size\_type \_\_pos) noexcept\

### Public Attributes

**std::vector**\< block\_type, allocator\_type \> **\_M\_w**\
 0 is the least significant word.

### Static Public Attributes

static const size\_type **\_S\_bits\_per\_block**\
 static const size\_type **npos**\

## Detailed Description

### template\<typename \_WordT = unsigned long long, typename \_Alloc = std::allocator\<\_WordT\>\>

struct std::tr2::\_\_dynamic\_bitset\_base\< \_WordT, \_Alloc \>"Base class, general case.

See documentation for dynamic\_bitset.

## Member Data Documentation

### template\<typename \_WordT = unsigned long long, typename \_Alloc = std::allocator\<\_WordT\>\> std::vector\<block\_type, allocator\_type\> std::tr2::\_\_dynamic\_bitset\_base\< \_WordT, \_Alloc \>::\_M\_w

0 is the least significant word.

## Author

Generated automatically by Doxygen for libstdc++ from the source code.