\inmodule QtCore More...

#include <qbitarray.h>

Collaboration diagram for QBitArray:

Public Types
typedef QByteArray::DataPointer	DataPtr

Public Member Functions
	QBitArray () noexcept
	Constructs an empty bit array.

	QBitArray (qsizetype size, bool val=false)
	Constructs a bit array containing size bits.

void	swap (QBitArray &other) noexcept

qsizetype	size () const
	Returns the number of bits stored in the bit array.

qsizetype	count () const
	Same as size().

qsizetype	count (bool on) const
	If on is true, this function returns the number of 1-bits stored in the bit array; otherwise the number of 0-bits is returned.

bool	isEmpty () const
	Returns `true` if this bit array has size 0; otherwise returns false.

bool	isNull () const
	Returns `true` if this bit array is null; otherwise returns `false`.

void	resize (qsizetype size)
	Resizes the bit array to size bits.

void	detach ()

bool	isDetached () const

void	clear ()
	Clears the contents of the bit array and makes it empty.

bool	testBit (qsizetype i) const
	Returns `true` if the bit at index position i is 1; otherwise returns `false`.

void	setBit (qsizetype i)
	Sets the bit at index position i to 1.

void	setBit (qsizetype i, bool val)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the bit at index position i to value.

void	clearBit (qsizetype i)
	Sets the bit at index position i to 0.

bool	toggleBit (qsizetype i)
	Inverts the value of the bit at index position i, returning the previous value of that bit as either true (if it was set) or false (if it was unset).

bool	at (qsizetype i) const
	Returns the value of the bit at index position i.

QBitRef	operator[] (qsizetype i)
	Returns the bit at index position i as a modifiable reference.

bool	operator[] (qsizetype i) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QBitArray &	operator&= (QBitArray &&)
	Performs the AND operation between all bits in this bit array and other.

QBitArray &	operator\|= (QBitArray &&)
	Performs the OR operation between all bits in this bit array and other.

QBitArray &	operator^= (QBitArray &&)
	Performs the XOR operation between all bits in this bit array and other.

QBitArray &	operator&= (const QBitArray &)

QBitArray &	operator\|= (const QBitArray &)

QBitArray &	operator^= (const QBitArray &)

bool	fill (bool aval, qsizetype asize=-1)
	Sets every bit in the bit array to value, returning true if successful; otherwise returns `false`.

void	fill (bool val, qsizetype first, qsizetype last)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets bits at index positions begin up to (but not including) end to value.

void	truncate (qsizetype pos)
	Truncates the bit array at index position pos.

const char *	bits () const

quint32	toUInt32 (QSysInfo::Endian endianness, bool *ok=nullptr) const noexcept

DataPtr &	data_ptr ()

const DataPtr &	data_ptr () const

Static Public Member Functions
static QBitArray	fromBits (const char *data, qsizetype len)

Friends
Q_CORE_EXPORT friend QBitArray	operator& (const QBitArray &a1, const QBitArray &a2)

QBitArray	operator& (QBitArray &&a1, const QBitArray &a2)

QBitArray	operator& (const QBitArray &a1, QBitArray &&a2)

QBitArray	operator& (QBitArray &&a1, QBitArray &&a2)
	Returns a bit array that is the AND of the bit arrays a1 and a2.

Q_CORE_EXPORT friend QBitArray	operator\| (const QBitArray &a1, const QBitArray &a2)

QBitArray	operator\| (QBitArray &&a1, const QBitArray &a2)

QBitArray	operator\| (const QBitArray &a1, QBitArray &&a2)

QBitArray	operator\| (QBitArray &&a1, QBitArray &&a2)
	Returns a bit array that is the OR of the bit arrays a1 and a2.

Q_CORE_EXPORT friend QBitArray	operator^ (const QBitArray &a1, const QBitArray &a2)

QBitArray	operator^ (QBitArray &&a1, const QBitArray &a2)

QBitArray	operator^ (const QBitArray &a1, QBitArray &&a2)

QBitArray	operator^ (QBitArray &&a1, QBitArray &&a2)
	Returns a bit array that is the XOR of the bit arrays a1 and a2.

Q_CORE_EXPORT QDataStream &	operator<< (QDataStream &, const QBitArray &)
	Writes bit array ba to stream out.

Q_CORE_EXPORT QDataStream &	operator>> (QDataStream &, QBitArray &)
	Reads a bit array into ba from stream in.

Q_CORE_EXPORT size_t	qHash (const QBitArray &key, size_t seed) noexcept

QBitArray	operator~ (QBitArray a)
	Returns a bit array that contains the inverted bits of the bit array a.

bool	comparesEqual (const QBitArray &lhs, const QBitArray &rhs) noexcept

Related Symbols
(Note that these are not member symbols.)
QDataStream &	operator<< (QDataStream &out, const QBitArray &ba)
	Writes bit array ba to stream out.

QDataStream &	operator>> (QDataStream &in, QBitArray &ba)
	Reads a bit array into ba from stream in.

Detailed Description

\inmodule QtCore

The QBitArray class provides an array of bits.

\reentrant

\compares equality

A QBitArray is an array that gives access to individual bits and provides operators (\l{operator&()}{AND}, \l{operator|()}{OR}, \l{operator^()}{XOR}, and \l{operator~()}{NOT}) that work on entire arrays of bits. It uses \l{implicit sharing} (copy-on-write) to reduce memory usage and to avoid the needless copying of data.

The following code constructs a QBitArray containing 200 bits initialized to false (0):

To initialize the bits to true, either pass true as second argument to the constructor, or call fill() later on.

QBitArray uses 0-based indexes, just like C++ arrays. To access the bit at a particular index position, you can use operator[](). On non-const bit arrays, operator[]() returns a reference to a bit that can be used on the left side of an assignment. For example:

For technical reasons, it is more efficient to use testBit() and setBit() to access bits in the array than operator[](). For example:

QBitArray supports {&} (\l{operator&()}{AND}), {|} (\l{operator|()}{OR}), {^} (\l{operator^()}{XOR}), {~} (\l{operator~()}{NOT}), as well as {&=}, {|=}, and {^=}. These operators work in the same way as the built-in C++ bitwise operators of the same name. For example:

QBitArray x(5);
x.setBit(3, true);
// x: [ 0, 0, 0, 1, 0 ]
 
QBitArray y(5);
y.setBit(4, true);
// y: [ 0, 0, 0, 0, 1 ]
 
x |= y;
// x: [ 0, 0, 0, 1, 1 ]

For historical reasons, QBitArray distinguishes between a null bit array and an empty bit array. A null bit array is a bit array that is initialized using QBitArray's default constructor. An empty bit array is any bit array with size 0. A null bit array is always empty, but an empty bit array isn't necessarily null:

QBitArray().isNull();           // returns true
QBitArray().isEmpty();          // returns true
 
QBitArray(0).isNull();          // returns false
QBitArray(0).isEmpty();         // returns true
 
QBitArray(3).isNull();          // returns false
QBitArray(3).isEmpty();         // returns false

All functions except isNull() treat null bit arrays the same as empty bit arrays; for example, QBitArray() compares equal to QBitArray(0). We recommend that you always use isEmpty() and avoid isNull().

See also: QByteArray, QList

Definition at line 12 of file qbitarray.h.

Member Typedef Documentation

◆ DataPtr

QBitArray::DataPtr

Definition at line 136 of file qbitarray.h.

Constructor & Destructor Documentation

◆ QBitArray() [1/2]

QBitArray::QBitArray ( )

inlinenoexcept

Constructs an empty bit array.

See also: isEmpty()

Definition at line 64 of file qbitarray.h.

◆ QBitArray() [2/2]

QBitArray::QBitArray	(	qsizetype	size,
		bool	value = false )

explicit

Constructs a bit array containing size bits.

The bits are initialized with value, which defaults to false (0).

Definition at line 139 of file qbitarray.cpp.

References adjust_head_and_tail(), QByteArray::data(), Q_ASSERT_X, and QByteArray::size().

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Member Function Documentation

◆ at()

bool QBitArray::at ( qsizetype i ) const

inline

Returns the value of the bit at index position i.

i must be a valid index position in the bit array (i.e., 0 <= i < size()).

See also: operator[]()

Definition at line 105 of file qbitarray.h.

References i, and testBit().

Referenced by QTriangulator< T >::ComplexToSimple::decompose(), and QTriangulator< T >::SimpleToMonotone::decompose().

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◆ bits()

const char * QBitArray::bits ( ) const

inline

Since: 5.11

Returns a pointer to a dense bit array for this QBitArray. Bits are counted upwards from the least significant bit in each byte. The number of bits relevant in the last byte is given by {size() % 8}.

See also: fromBits(), size()

Definition at line 130 of file qbitarray.h.

References d, and nullptr.

◆ clear()

void QBitArray::clear ( )

inline

Clears the contents of the bit array and makes it empty.

See also: resize(), isEmpty()

Definition at line 87 of file qbitarray.h.

References d.

Referenced by QHeaderViewPrivate::clear(), QIconModeViewBase::clear(), and QHeaderViewPrivate::prepareSectionSelected().

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◆ clearBit()

void QBitArray::clearBit ( qsizetype i )

inline

Sets the bit at index position i to 0.

i must be a valid index position in the bit array (i.e., 0 <= i < size()).

See also: setBit(), toggleBit()

Definition at line 95 of file qbitarray.h.

References i.

Referenced by QRhiVulkan::beginFrame(), and QRhiVulkan::endOffscreenFrame().

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◆ count() [1/2]

qsizetype QBitArray::count ( ) const

inline

Same as size().

Definition at line 77 of file qbitarray.h.

◆ count() [2/2]

qsizetype QBitArray::count ( bool on ) const

If on is true, this function returns the number of 1-bits stored in the bit array; otherwise the number of 0-bits is returned.

Definition at line 166 of file qbitarray.cpp.

References QByteArray::data(), QByteArray::end(), and qPopulationCount().

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◆ data_ptr() [1/2]

DataPtr & QBitArray::data_ptr ( )

inline

Definition at line 137 of file qbitarray.h.

References d.

◆ data_ptr() [2/2]

const DataPtr & QBitArray::data_ptr ( ) const

inline

Definition at line 138 of file qbitarray.h.

References d.

◆ detach()

void QBitArray::detach ( )

inline

Definition at line 85 of file qbitarray.h.

References d.

◆ fill() [1/2]

bool QBitArray::fill	(	bool	value,
		qsizetype	size = -1 )

inline

Sets every bit in the bit array to value, returning true if successful; otherwise returns false.

If size is different from -1 (the default), the bit array is resized to size beforehand.

Example:

QBitArray ba(8);
ba.fill(true);
// ba: [ 1, 1, 1, 1, 1, 1, 1, 1 ]
 
ba.fill(false, 2);
// ba: [ 0, 0 ]

See also: resize()

Definition at line 124 of file qbitarray.h.

References QBitArray().

Referenced by QHeaderViewPrivate::prepareSectionSelected(), and QGridLayoutRowData::reset().

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◆ fill() [2/2]

void QBitArray::fill	(	bool	value,
		qsizetype	begin,
		qsizetype	end )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets bits at index positions begin up to (but not including) end to value.

begin must be a valid index position in the bit array (0 <= begin < size()).

end must be either a valid index position or equal to size(), in which case the fill operation runs until the end of the array (0 <= end <= size()).

Example:

QBitArray ba(4);
ba.fill(true, 1, 2);            // ba: [ 0, 1, 0, 0 ]
ba.fill(true, 1, 3);            // ba: [ 0, 1, 1, 0 ]
ba.fill(true, 1, 4);            // ba: [ 0, 1, 1, 1 ]

Definition at line 271 of file qbitarray.cpp.

References begin(), QByteArray::data(), and setBit().

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◆ fromBits()

QBitArray QBitArray::fromBits	(	const char *	data,
		qsizetype	size )

static

Since: 5.11

Creates a QBitArray with the dense bit array located at data, with size bits. The byte array at data must be at least size / 8 (rounded up) bytes long.

If size is not a multiple of 8, this function will include the lowest size % 8 bits from the last byte in data.

See also: bits()

Definition at line 309 of file qbitarray.cpp.

References adjust_head_and_tail(), allocation_size(), QByteArray::data(), Q_ASSERT_X, QByteArray::resize(), and QByteArray::size().

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◆ isDetached()

bool QBitArray::isDetached ( ) const

inline

Definition at line 86 of file qbitarray.h.

References d.

◆ isEmpty()

bool QBitArray::isEmpty ( ) const

inline

Returns true if this bit array has size 0; otherwise returns false.

See also: size()

Definition at line 80 of file qbitarray.h.

References d.

◆ isNull()

bool QBitArray::isNull ( ) const

inline

Returns true if this bit array is null; otherwise returns false.

Example:

QBitArray().isNull();           // returns true
QBitArray(0).isNull();          // returns false
QBitArray(3).isNull();          // returns false

Qt makes a distinction between null bit arrays and empty bit arrays for historical reasons. For most applications, what matters is whether or not a bit array contains any data, and this can be determined using isEmpty().

See also: isEmpty()

Definition at line 81 of file qbitarray.h.

References d.

◆ operator&=() [1/2]

QBitArray & QBitArray::operator&= ( const QBitArray & other )

Definition at line 662 of file qbitarray.cpp.

References other(), and performBitwiseOperation().

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◆ operator&=() [2/2]

QBitArray & QBitArray::operator&= ( QBitArray && other )

Performs the AND operation between all bits in this bit array and other.

Assigns the result to this bit array, and returns a reference to it.

The result has the length of the longest of the two bit arrays, with any missing bits (if one array is shorter than the other) taken to be 0.

Example:

QBitArray a(3);
QBitArray b(2);
a[0] = 1; a[1] = 0; a[2] = 1;   // a: [ 1, 0, 1 ]
b[0] = 1; b[1] = 1;             // b: [ 1, 1 ]
a &= b;                         // a: [ 1, 0, 0 ]

See also: operator&(), operator|=(), operator^=(), operator~()

Definition at line 657 of file qbitarray.cpp.

References other(), and performBitwiseOperation().

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◆ operator[]() [1/2]

QBitRef QBitArray::operator[] ( qsizetype i )

inline

Returns the bit at index position i as a modifiable reference.

i must be a valid index position in the bit array (i.e., 0 <= i < size()).

Example:

QBitArray a(3);
a[0] = false;
a[1] = true;
a[2] = a[0] ^ a[1];

The return value is of type QBitRef, a helper class for QBitArray. When you get an object of type QBitRef, you can assign to it, and the assignment will apply to the bit in the QBitArray from which you got the reference.

The functions testBit(), setBit(), and clearBit() are slightly faster.

See also: at(), testBit(), setBit(), clearBit()

Definition at line 163 of file qbitarray.h.

References i, and Q_ASSERT.

◆ operator[]() [2/2]

bool QBitArray::operator[] ( qsizetype i ) const

inline

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 107 of file qbitarray.h.

References i, and testBit().

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◆ operator^=() [1/2]

QBitArray & QBitArray::operator^= ( const QBitArray & other )

Definition at line 718 of file qbitarray.cpp.

References other(), and performBitwiseOperation().

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◆ operator^=() [2/2]

QBitArray & QBitArray::operator^= ( QBitArray && other )

Performs the XOR operation between all bits in this bit array and other.

Assigns the result to this bit array, and returns a reference to it.

The result has the length of the longest of the two bit arrays, with any missing bits (if one array is shorter than the other) taken to be 0.

Example:

QBitArray a(3);
QBitArray b(2);
a[0] = 1; a[1] = 0; a[2] = 1;   // a: [ 1, 0, 1 ]
b[0] = 1; b[1] = 1;             // b: [ 1, 1 ]
a ^= b;                         // a: [ 0, 1, 1 ]

See also: operator^(), operator&=(), operator|=(), operator~()

Definition at line 713 of file qbitarray.cpp.

References other(), and performBitwiseOperation().

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◆ operator|=() [1/2]

QBitArray & QBitArray::operator|= ( const QBitArray & other )

Definition at line 690 of file qbitarray.cpp.

References other(), and performBitwiseOperation().

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◆ operator|=() [2/2]

QBitArray & QBitArray::operator|= ( QBitArray && other )

Performs the OR operation between all bits in this bit array and other.

Assigns the result to this bit array, and returns a reference to it.

The result has the length of the longest of the two bit arrays, with any missing bits (if one array is shorter than the other) taken to be 0.

Example:

QBitArray a(3);
QBitArray b(2);
a[0] = 1; a[1] = 0; a[2] = 1;   // a: [ 1, 0, 1 ]
b[0] = 1; b[1] = 1;             // b: [ 1, 1 ]
a |= b;                         // a: [ 1, 1, 1 ]

See also: operator|(), operator&=(), operator^=(), operator~()

Definition at line 685 of file qbitarray.cpp.

References other(), and performBitwiseOperation().

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◆ resize()

void QBitArray::resize ( qsizetype size )

Resizes the bit array to size bits.

If size is greater than the current size, the bit array is extended to make it size bits with the extra bits added to the end. The new bits are initialized to false (0).

If size is less than the current size, bits are removed from the end.

See also: size()

Definition at line 208 of file qbitarray.cpp.

References adjust_head_and_tail(), allocation_size(), QByteArray::data(), Q_ASSERT_X, QByteArray::resize(), and QByteArray::size().

Referenced by QHeaderViewPrivate::sectionsHiddenToBitVector(), and QLCDNumber::setDigitCount().

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◆ setBit() [1/2]

bool QBitArray::setBit ( qsizetype i )

inline

Sets the bit at index position i to 1.

i must be a valid index position in the bit array (i.e., 0 <= i < size()).

See also: clearBit(), toggleBit()

Definition at line 91 of file qbitarray.h.

References i.

Referenced by QRhiVulkan::beginFrame(), QRhiVulkan::beginOffscreenFrame(), QTriangulator< T >::ComplexToSimple::decompose(), QTriangulator< T >::SimpleToMonotone::decompose(), fill(), and QHeaderViewPrivate::isSectionSelected().

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◆ setBit() [2/2]

void QBitArray::setBit	(	qsizetype	i,
		bool	val )

inline

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the bit at index position i to value.

Definition at line 93 of file qbitarray.h.

References i, and setBit().

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◆ size()

qsizetype QBitArray::size ( ) const

inline

Returns the number of bits stored in the bit array.

See also: resize()

Definition at line 76 of file qbitarray.h.

References d.

Referenced by QRhiVulkan::beginFrame(), QRhiVulkan::beginOffscreenFrame(), QHeaderViewPrivate::isSectionSelected(), and QHeaderViewPrivate::prepareSectionSelected().

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◆ swap()

void QBitArray::swap ( QBitArray & other )

inlinenoexcept

Since: 4.8

Swaps bit array other with this bit array. This operation is very fast and never fails.

Definition at line 74 of file qbitarray.h.

References d, and other().

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◆ testBit()

bool QBitArray::testBit ( qsizetype i ) const

inline

Returns true if the bit at index position i is 1; otherwise returns false.

i must be a valid index position in the bit array (i.e., 0 <= i < size()).

See also: setBit(), clearBit()

Definition at line 89 of file qbitarray.h.

References i.

Referenced by QRhiVulkan::beginFrame(), QRhiVulkan::beginOffscreenFrame(), QGridLayoutRowData::calculateGeometries(), QHeaderViewPrivate::isSectionSelected(), QGridLayoutRowData::stealBox(), and QGridLayoutRowData::totalBox().

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◆ toggleBit()

bool QBitArray::toggleBit ( qsizetype i )

inline

Inverts the value of the bit at index position i, returning the previous value of that bit as either true (if it was set) or false (if it was unset).

If the previous value was 0, the new value will be 1. If the previous value was 1, the new value will be 0.

i must be a valid index position in the bit array (i.e., 0 <= i < size()).

See also: setBit(), clearBit()

Definition at line 97 of file qbitarray.h.

References i.

◆ toUInt32()

quint32 QBitArray::toUInt32	(	QSysInfo::Endian	endianness,
		bool *	ok = nullptr ) const

noexcept

Since: 6.0

Returns the array of bit converted to an int. The conversion is based on endianness. Converts up to the first 32 bits of the array to quint32 and returns it, obeying endianness. If ok is not a null pointer, and the array has more than 32 bits, ok is set to false and this function returns zero; otherwise, it's set to true.

Definition at line 332 of file qbitarray.cpp.

References i, QSysInfo::LittleEndian, ok, and testBit().

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◆ truncate()

void QBitArray::truncate ( qsizetype pos )

inline

Truncates the bit array at index position pos.

If pos is beyond the end of the array, nothing happens.

See also: resize()

Definition at line 128 of file qbitarray.h.

References pos, and resize().

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Friends And Related Symbol Documentation

◆ comparesEqual

bool comparesEqual	(	const QBitArray &	lhs,
		const QBitArray &	rhs )

friend

Definition at line 141 of file qbitarray.h.

◆ operator& [1/4]

QBitArray QBitArray::operator&	(	const QBitArray &	a1,
		const QBitArray &	a2 )

friend

Definition at line 784 of file qbitarray.cpp.

◆ operator& [2/4]

QBitArray QBitArray::operator&	(	const QBitArray &	a1,
		QBitArray &&	a2 )

friend

Definition at line 17 of file qbitarray.h.

◆ operator& [3/4]

QBitArray QBitArray::operator&	(	QBitArray &&	a1,
		const QBitArray &	a2 )

friend

Definition at line 15 of file qbitarray.h.

◆ operator& [4/4]

QBitArray QBitArray::operator&	(	QBitArray &&	a1,
		QBitArray &&	a2 )

friend

Returns a bit array that is the AND of the bit arrays a1 and a2.

The result has the length of the longest of the two bit arrays, with any missing bits (if one array is shorter than the other) taken to be 0.

Example:

QBitArray a(3);
QBitArray b(2);
QBitArray c;
a[0] = 1; a[1] = 0; a[2] = 1;   // a: [ 1, 0, 1 ]
b[0] = 1; b[1] = 1;             // b: [ 1, 1 ]
c = a & b;                      // c: [ 1, 0, 0 ]

See also: {QBitArray::}{operator&=()}, {QBitArray::}{operator|()}, {QBitArray::}{operator^()}

Definition at line 19 of file qbitarray.h.

◆ operator<< [1/2]

QDataStream & operator<<	(	QDataStream &	out,
		const QBitArray &	ba )

friend

Writes bit array ba to stream out.

See also: {Serializing Qt Data Types}{Format of the QDataStream operators}

Definition at line 897 of file qbitarray.cpp.

◆ operator<<() [2/2]

QDataStream & operator<<	(	QDataStream &	out,
		const QBitArray &	ba )

See also: {Serializing Qt Data Types}{Format of the QDataStream operators}

Definition at line 897 of file qbitarray.cpp.

◆ operator>> [1/2]

QDataStream & operator>>	(	QDataStream &	in,
		QBitArray &	ba )

friend

Reads a bit array into ba from stream in.

See also: {Serializing Qt Data Types}{Format of the QDataStream operators}

Definition at line 922 of file qbitarray.cpp.

◆ operator>>() [2/2]

QDataStream & operator>>	(	QDataStream &	in,
		QBitArray &	ba )

See also: {Serializing Qt Data Types}{Format of the QDataStream operators}

Definition at line 922 of file qbitarray.cpp.

◆ operator^ [1/4]

QBitArray QBitArray::operator^	(	const QBitArray &	a1,
		const QBitArray &	a2 )

friend

Definition at line 836 of file qbitarray.cpp.

◆ operator^ [2/4]

QBitArray QBitArray::operator^	(	const QBitArray &	a1,
		QBitArray &&	a2 )

friend

Definition at line 33 of file qbitarray.h.

◆ operator^ [3/4]

QBitArray QBitArray::operator^	(	QBitArray &&	a1,
		const QBitArray &	a2 )

friend

Definition at line 31 of file qbitarray.h.

◆ operator^ [4/4]

QBitArray QBitArray::operator^	(	QBitArray &&	a1,
		QBitArray &&	a2 )

friend

Returns a bit array that is the XOR of the bit arrays a1 and a2.

The result has the length of the longest of the two bit arrays, with any missing bits (if one array is shorter than the other) taken to be 0.

Example:

QBitArray a(3);
QBitArray b(2);
QBitArray c;
a[0] = 1; a[1] = 0; a[2] = 1;   // a: [ 1, 0, 1 ]
b[0] = 1; b[1] = 1;             // b: [ 1, 1 ]
c = a ^ b;                      // c: [ 0, 1, 1 ]

See also: {QBitArray}{operator^=()}, {QBitArray}{operator&()}, {QBitArray}{operator|()}

Definition at line 35 of file qbitarray.h.

◆ operator| [1/4]

QBitArray QBitArray::operator\|	(	const QBitArray &	a1,
		const QBitArray &	a2 )

friend

Definition at line 810 of file qbitarray.cpp.

◆ operator| [2/4]

QBitArray QBitArray::operator\|	(	const QBitArray &	a1,
		QBitArray &&	a2 )

friend

Definition at line 25 of file qbitarray.h.

◆ operator| [3/4]

QBitArray QBitArray::operator\|	(	QBitArray &&	a1,
		const QBitArray &	a2 )

friend

Definition at line 23 of file qbitarray.h.

◆ operator| [4/4]

QBitArray QBitArray::operator\|	(	QBitArray &&	a1,
		QBitArray &&	a2 )

friend

Returns a bit array that is the OR of the bit arrays a1 and a2.

The result has the length of the longest of the two bit arrays, with any missing bits (if one array is shorter than the other) taken to be 0.

Example:

QBitArray a(3);
QBitArray b(2);
QBitArray c;
a[0] = 1; a[1] = 0; a[2] = 1;   // a: [ 1, 0, 1 ]
b[0] = 1; b[1] = 1;             // b: [ 1, 1 ]
c = a | b;                      // c: [ 1, 1, 1 ]

See also: QBitArray::operator|=(), operator&(), operator^()

Definition at line 27 of file qbitarray.h.

◆ operator~

QBitArray QBitArray::operator~ ( QBitArray a )

friend

Returns a bit array that contains the inverted bits of the bit array a.

Example:

QBitArray a(3);
QBitArray b;
a[0] = 1; a[1] = 0; a[2] = 1;   // a: [ 1, 0, 1 ]
b = ~a;                         // b: [ 0, 1, 0 ]

See also: operator&(), operator|(), operator^()

Definition at line 43 of file qbitarray.h.

◆ qHash

Q_CORE_EXPORT size_t qHash	(	const QBitArray &	key,
		size_t	seed )

friend

Definition at line 1125 of file qhash.cpp.

The documentation for this class was generated from the following files:

qtbase/src/corelib/tools/qbitarray.h (2606c0966669fe76300d4c818f8c05e778aacd23)
qtbase/src/corelib/tools/qbitarray.cpp (2606c0966669fe76300d4c818f8c05e778aacd23)

Public Types

Public Member Functions

Static Public Member Functions

Friends

Related Symbols

Detailed Description

Member Typedef Documentation

◆ DataPtr

Constructor & Destructor Documentation

◆ QBitArray() [1/2]

◆ QBitArray() [2/2]

Member Function Documentation

◆ at()

◆ bits()

◆ clear()

◆ clearBit()

◆ count() [1/2]

◆ count() [2/2]

◆ data_ptr() [1/2]

◆ data_ptr() [2/2]

◆ detach()

◆ fill() [1/2]

◆ fill() [2/2]

◆ fromBits()

◆ isDetached()

◆ isEmpty()

◆ isNull()

◆ operator&=() [1/2]

◆ operator&=() [2/2]

◆ operator[]() [1/2]

◆ operator[]() [2/2]

◆ operator^=() [1/2]

◆ operator^=() [2/2]

◆ operator|=() [1/2]

◆ operator|=() [2/2]

◆ resize()

◆ setBit() [1/2]

◆ setBit() [2/2]

◆ size()

◆ swap()

◆ testBit()

◆ toggleBit()

◆ toUInt32()

◆ truncate()

Friends And Related Symbol Documentation

◆ comparesEqual

◆ operator& [1/4]

◆ operator& [2/4]

◆ operator& [3/4]

◆ operator& [4/4]

◆ operator<< [1/2]

◆ operator<<() [2/2]

◆ operator>> [1/2]

◆ operator>>() [2/2]

◆ operator^ [1/4]

◆ operator^ [2/4]

◆ operator^ [3/4]

◆ operator^ [4/4]

◆ operator| [1/4]

◆ operator| [2/4]

◆ operator| [3/4]

◆ operator| [4/4]

◆ operator~

◆ qHash