Inherits std::tr2::__dynamic_bitset_base< _WordT, _Alloc >.
typedef __dynamic_bitset_base< _WordT, _Alloc > _Base
typedef _Alloc allocator_type
typedef _WordT block_type
typedef bool const_reference
typedef size_t size_type
dynamic_bitset (const allocator_type &__alloc=allocator_type())
All bits set to zero.
dynamic_bitset (size_type __nbits, unsigned long long __val=0ULL, const allocator_type &__alloc=allocator_type())
Initial bits bitwise-copied from a single word (others set to zero).
dynamic_bitset (initializer_list< block_type > __il, const allocator_type &__alloc=allocator_type())
template<typename _CharT , typename _Traits , typename _Alloc1 > dynamic_bitset (const std::basic_string< _CharT, _Traits, _Alloc1 > &__str, typename basic_string< _CharT, _Traits, _Alloc1 >::size_type __pos=0, typename basic_string< _CharT, _Traits, _Alloc1 >::size_type __n=std::basic_string< _CharT, _Traits, _Alloc1 >::npos, _CharT __zero=_CharT('0'), _CharT __one=_CharT('1'), const allocator_type &__alloc=allocator_type())
Use a subset of a string.
dynamic_bitset (const char *__str, const allocator_type &__alloc=allocator_type())
Construct from a string.
dynamic_bitset (const dynamic_bitset &__b)
Copy constructor.
dynamic_bitset (dynamic_bitset &&__b)
Move constructor.
template<typename _CharT , typename _Traits > void _M_copy_from_ptr (const _CharT *, size_t, size_t, size_t, _CharT, _CharT)
template<typename _CharT , typename _Traits , typename _Alloc1 > void _M_copy_from_string (const std::basic_string< _CharT, _Traits, _Alloc1 > &__str, size_t __pos, size_t __n, _CharT __zero=_CharT('0'), _CharT __one=_CharT('1'))
template<typename _CharT , typename _Traits , typename _Alloc1 > void _M_copy_to_string (std::basic_string< _CharT, _Traits, _Alloc1 > &__str, _CharT __zero=_CharT('0'), _CharT __one=_CharT('1')) const
bool all () const
Tests whether all the bits are on.
bool any () const
Tests whether any of the bits are on.
void append (block_type __block)
Append a block.
void append (initializer_list< block_type > __il)
template<typename _BlockInputIterator > void append (_BlockInputIterator __first, _BlockInputIterator __last)
Append an iterator range of blocks.
void clear ()
Clear the bitset.
size_type count () const noexcept
Returns the number of bits which are set.
bool empty () const noexcept
Returns true if the dynamic_bitset is empty.
size_type find_first () const
Finds the index of the first 'on' bit.
size_type find_next (size_t __prev) const
Finds the index of the next 'on' bit after prev.
dynamic_bitset< _WordT, _Alloc > & flip ()
Toggles every bit to its opposite value.
dynamic_bitset< _WordT, _Alloc > & flip (size_type __pos)
Toggles a given bit to its opposite value.
allocator_type get_allocator () const
Return the allocator for the bitset.
bool is_proper_subset_of (const dynamic_bitset &__b) const
bool is_subset_of (const dynamic_bitset &__b) const
constexpr size_type max_size () noexcept
Returns the maximum size of a dynamic_bitset object having the same type as *this. The real answer is max() * bits_per_block but is likely to overflow.
bool none () const
Tests whether any of the bits are on.
size_type num_blocks () const noexcept
Returns the total number of blocks.
dynamic_bitset & operator= (const dynamic_bitset &__b)
Assignment.
dynamic_bitset & operator= (dynamic_bitset &&__b)
Move assignment.
dynamic_bitset< _WordT, _Alloc > operator~ () const
See the no-argument flip().
void push_back (bool __bit)
Push a bit onto the high end of the bitset.
dynamic_bitset< _WordT, _Alloc > & reset ()
Sets every bit to false.
dynamic_bitset< _WordT, _Alloc > & reset (size_type __pos)
Sets a given bit to false.
void resize (size_type __nbits, bool __value=false)
Resize the bitset.
dynamic_bitset< _WordT, _Alloc > & set ()
Sets every bit to true.
dynamic_bitset< _WordT, _Alloc > & set (size_type __pos, bool __val=true)
Sets a given bit to a particular value.
size_type size () const noexcept
Returns the total number of bits.
void swap (dynamic_bitset &__b)
Swap with another bitset.
bool test (size_type __pos) const
Tests the value of a bit.
template<typename _CharT = char, typename _Traits = std::char_traits<_CharT>, typename _Alloc1 = std::allocator<_CharT>> std::basic_string< _CharT, _Traits, _Alloc1 > to_string (_CharT __zero=_CharT('0'), _CharT __one=_CharT('1')) const
Returns a character interpretation of the dynamic_bitset.
unsigned long long to_ullong () const
Returns a numerical interpretation of the dynamic_bitset.
unsigned long to_ulong () const
Returns a numerical interpretation of the dynamic_bitset.
dynamic_bitset< _WordT, _Alloc > & operator&= (const dynamic_bitset< _WordT, _Alloc > &__rhs)
Operations on dynamic_bitsets.
dynamic_bitset< _WordT, _Alloc > & operator&= (dynamic_bitset< _WordT, _Alloc > &&__rhs)
Operations on dynamic_bitsets.
dynamic_bitset< _WordT, _Alloc > & operator|= (const dynamic_bitset< _WordT, _Alloc > &__rhs)
Operations on dynamic_bitsets.
dynamic_bitset< _WordT, _Alloc > & operator^= (const dynamic_bitset< _WordT, _Alloc > &__rhs)
Operations on dynamic_bitsets.
dynamic_bitset< _WordT, _Alloc > & operator-= (const dynamic_bitset< _WordT, _Alloc > &__rhs)
Operations on dynamic_bitsets.
dynamic_bitset< _WordT, _Alloc > & operator<<= (size_type __pos)
Operations on dynamic_bitsets.
dynamic_bitset< _WordT, _Alloc > & operator>>= (size_type __pos)
Operations on dynamic_bitsets.
reference operator[] (size_type __pos)
Array-indexing support.
const_reference operator[] (size_type __pos) const
Array-indexing support.
dynamic_bitset< _WordT, _Alloc > operator<< (size_type __pos) const
Self-explanatory.
dynamic_bitset< _WordT, _Alloc > operator>> (size_type __pos) const
Self-explanatory.
static const size_type bits_per_block
static const size_type npos
size_t _M_are_all_aux () const
void _M_assign (const __dynamic_bitset_base &__b)
void _M_clear ()
void _M_do_and (const __dynamic_bitset_base &__x)
void _M_do_append_block (block_type __block, size_type __pos)
size_t _M_do_count () const
void _M_do_dif (const __dynamic_bitset_base &__x)
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 ()
void _M_do_left_shift (size_t __shift)
void _M_do_or (const __dynamic_bitset_base &__x)
void _M_do_reset ()
void _M_do_right_shift (size_t __shift)
void _M_do_set ()
unsigned long long _M_do_to_ullong () const
unsigned long _M_do_to_ulong () const
void _M_do_xor (const __dynamic_bitset_base &__x)
allocator_type _M_get_allocator () const
block_type & _M_getword (size_type __pos)
block_type _M_getword (size_type __pos) const
block_type & _M_hiword ()
block_type _M_hiword () const
bool _M_is_any () const
bool _M_is_equal (const __dynamic_bitset_base &__x) const
bool _M_is_less (const __dynamic_bitset_base &__x) const
bool _M_is_proper_subset_of (const __dynamic_bitset_base &__b) const
bool _M_is_subset_of (const __dynamic_bitset_base &__b)
void _M_resize (size_t __nbits, bool __value)
size_type _M_size () const noexcept
void _M_swap (__dynamic_bitset_base &__b)
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
std::vector< block_type, allocator_type > _M_w
0 is the least significant word.
static const size_type _S_bits_per_block
bool operator< (const dynamic_bitset< _WordT, _Alloc > &__lhs, const dynamic_bitset< _WordT, _Alloc > &__rhs)
bool operator== (const dynamic_bitset< _WordT, _Alloc > &__lhs, const dynamic_bitset< _WordT, _Alloc > &__rhs)
class reference
See N2050, Proposal to Add a Dynamically Sizeable Bitset to the Standard Library.
In the general unoptimized case, storage is allocated in word-sized blocks. Let B be the number of bits in a word, then (Nb+(B-1))/B words will be used for storage. B - NbB bits are unused. (They are the high-order bits in the highest word.) It is a class invariant that those unused bits are always zero.
If you think of dynamic_bitset as 'a simple array of bits,' be aware that your mental picture is reversed: a dynamic_bitset behaves the same way as bits in integers do, with the bit at index 0 in the 'least significant / right-hand' position, and the bit at index Nb-1 in the 'most significant / left-hand' position. Thus, unlike other containers, a dynamic_bitset's index 'counts from right to left,' to put it very loosely.
This behavior is preserved when translating to and from strings. For example, the first line of the following program probably prints 'b('a') is 0001100001' on a modern ASCII system.
#include <dynamic_bitset> #include <iostream> #include <sstream> using namespace std; int main() { long a = 'a'; dynamic_bitset<> b(a); cout << "b('a') is " << b << endl; ostringstream s; s << b; string str = s.str(); cout << "index 3 in the string is " << str[3] << " but << "index 3 in the bitset is " << b[3] << endl; }
Most of the actual code isn't contained in dynamic_bitset<> itself, but in the base class __dynamic_bitset_base. The base class works with whole words, not with individual bits. This allows us to specialize __dynamic_bitset_base for the important special case where the dynamic_bitset is only a single word.
Extra confusion can result due to the fact that the storage for __dynamic_bitset_base is a vector, and is indexed as such. This is carefully encapsulated.
Definition at line 413 of file dynamic_bitset.
All bits set to zero.
Definition at line 574 of file dynamic_bitset.
Initial bits bitwise-copied from a single word (others set to zero).
Definition at line 580 of file dynamic_bitset.
Use a subset of a string.
Parameters:
Exceptions:
Definition at line 605 of file dynamic_bitset.
References std::basic_string< _CharT, _Traits, _Alloc >::size().
Construct from a string.
Parameters:
Exceptions:
Definition at line 634 of file dynamic_bitset.
References std::tr2::dynamic_bitset< _WordT, _Alloc >::resize().
Copy constructor.
Definition at line 650 of file dynamic_bitset.
Move constructor.
Definition at line 657 of file dynamic_bitset.
Tests whether all the bits are on.
Returns:
Definition at line 1046 of file dynamic_bitset.
Tests whether any of the bits are on.
Returns:
Definition at line 1054 of file dynamic_bitset.
Append a block.
Definition at line 740 of file dynamic_bitset.
Referenced by std::tr2::dynamic_bitset< _WordT, _Alloc >::append().
Append an iterator range of blocks.
Definition at line 758 of file dynamic_bitset.
References std::tr2::dynamic_bitset< _WordT, _Alloc >::append().
Clear the bitset.
Definition at line 718 of file dynamic_bitset.
Returns the number of bits which are set.
Definition at line 1002 of file dynamic_bitset.
Returns true if the dynamic_bitset is empty.
Definition at line 1017 of file dynamic_bitset.
Finds the index of the first 'on' bit.
Returns:
See also:
Definition at line 1082 of file dynamic_bitset.
Finds the index of the next 'on' bit after prev.
Returns:
Parameters:
See also:
Definition at line 1092 of file dynamic_bitset.
Toggles every bit to its opposite value.
Definition at line 897 of file dynamic_bitset.
Referenced by std::tr2::dynamic_bitset< _WordT, _Alloc >::operator~().
Toggles a given bit to its opposite value.
Parameters:
Exceptions:
Definition at line 910 of file dynamic_bitset.
Return the allocator for the bitset.
Definition at line 698 of file dynamic_bitset.
Returns the maximum size of a dynamic_bitset object having the same type as *this. The real answer is max() * bits_per_block but is likely to overflow.
Definition at line 1024 of file dynamic_bitset.
References std::numeric_limits< _Tp >::max().
Tests whether any of the bits are on.
Returns:
Definition at line 1062 of file dynamic_bitset.
Returns the total number of blocks.
Definition at line 1012 of file dynamic_bitset.
Operations on dynamic_bitsets.
Parameters:
These should be self-explanatory.
Definition at line 773 of file dynamic_bitset.
Operations on dynamic_bitsets.
Parameters:
These should be self-explanatory.
Definition at line 780 of file dynamic_bitset.
Operations on dynamic_bitsets.
Parameters:
These should be self-explanatory.
Definition at line 801 of file dynamic_bitset.
Self-explanatory.
Definition at line 1068 of file dynamic_bitset.
Operations on dynamic_bitsets.
Parameters:
These should be self-explanatory.
Definition at line 816 of file dynamic_bitset.
Assignment.
Definition at line 675 of file dynamic_bitset.
Move assignment.
Definition at line 688 of file dynamic_bitset.
References std::tr2::dynamic_bitset< _WordT, _Alloc >::swap().
Self-explanatory.
Definition at line 1072 of file dynamic_bitset.
Operations on dynamic_bitsets.
Parameters:
These should be self-explanatory.
Definition at line 829 of file dynamic_bitset.
Array-indexing support.
Parameters:
Returns:
Note:
Definition at line 932 of file dynamic_bitset.
Array-indexing support.
Parameters:
Returns:
Note:
Definition at line 936 of file dynamic_bitset.
Operations on dynamic_bitsets.
Parameters:
These should be self-explanatory.
Definition at line 794 of file dynamic_bitset.
Operations on dynamic_bitsets.
Parameters:
These should be self-explanatory.
Definition at line 787 of file dynamic_bitset.
See the no-argument flip().
Definition at line 919 of file dynamic_bitset.
References std::tr2::dynamic_bitset< _WordT, _Alloc >::flip().
Push a bit onto the high end of the bitset.
Definition at line 728 of file dynamic_bitset.
References std::tr2::dynamic_bitset< _WordT, _Alloc >::size().
Sets every bit to false.
Definition at line 872 of file dynamic_bitset.
Sets a given bit to false.
Parameters:
Exceptions:
Same as writing set(__pos, false).
Definition at line 886 of file dynamic_bitset.
Resize the bitset.
Definition at line 705 of file dynamic_bitset.
Referenced by std::tr2::dynamic_bitset< _WordT, _Alloc >::dynamic_bitset().
Sets every bit to true.
Definition at line 847 of file dynamic_bitset.
Sets a given bit to a particular value.
Parameters:
Exceptions:
Definition at line 861 of file dynamic_bitset.
Returns the total number of bits.
Definition at line 1007 of file dynamic_bitset.
Referenced by std::tr2::operator>>(), and std::tr2::dynamic_bitset< _WordT, _Alloc >::push_back().
Swap with another bitset.
Definition at line 665 of file dynamic_bitset.
Referenced by std::tr2::dynamic_bitset< _WordT, _Alloc >::operator=().
Tests the value of a bit.
Parameters:
Returns:
Exceptions:
Definition at line 1034 of file dynamic_bitset.
Returns a character interpretation of the dynamic_bitset.
Returns:
Note the ordering of the bits: decreasing character positions correspond to increasing bit positions (see the main class notes for an example).
Definition at line 972 of file dynamic_bitset.
Returns a numerical interpretation of the dynamic_bitset.
Returns:
Exceptions:
Definition at line 957 of file dynamic_bitset.
Returns a numerical interpretation of the dynamic_bitset.
Returns:
Exceptions:
Definition at line 947 of file dynamic_bitset.
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