\inmodule QtCore More...

#include <qjsonarray.h>

Collaboration diagram for QJsonArray::const_iterator:

Public Types
typedef std::random_access_iterator_tag	iterator_category
	A synonym for {std::random_access_iterator_tag} indicating this iterator is a random access iterator.

typedef qptrdiff	difference_type

typedef QJsonValue	value_type

typedef const QJsonValueRef	reference

typedef const QJsonValueRef *	pointer

Public Member Functions
	const_iterator ()
	Constructs an uninitialized iterator.

	const_iterator (const QJsonArray *array, qsizetype index)

	const_iterator (const iterator &o)
	Constructs a copy of other.

constexpr	const_iterator (const const_iterator &other)=default

const_iterator &	operator= (const const_iterator &other)

const QJsonValueConstRef	operator* () const
	Returns the current item.

const QJsonValueConstRef *	operator-> () const
	Returns a pointer to the current item.

QJsonValueConstRef	operator[] (qsizetype j) const
	Returns the item at offset j from the item pointed to by this iterator (the item at position {*this + j}).

bool	operator== (const const_iterator &o) const
	Returns `true` if other points to the same item as this iterator; otherwise returns `false`.

bool	operator!= (const const_iterator &o) const
	Returns `true` if other points to a different item than this iterator; otherwise returns `false`.

bool	operator< (const const_iterator &other) const
	Returns `true` if the item pointed to by this iterator is less than the item pointed to by the other iterator.

bool	operator<= (const const_iterator &other) const
	Returns `true` if the item pointed to by this iterator is less than or equal to the item pointed to by the other iterator.

bool	operator> (const const_iterator &other) const
	Returns `true` if the item pointed to by this iterator is greater than the item pointed to by the other iterator.

bool	operator>= (const const_iterator &other) const
	Returns `true` if the item pointed to by this iterator is greater than or equal to the item pointed to by the other iterator.

const_iterator &	operator++ ()
	The prefix {++} operator, {++it}, advances the iterator to the next item in the array and returns an iterator to the new current item.

const_iterator	operator++ (int)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.The postfix {++} operator, {it++}, advances the iterator to the next item in the array and returns an iterator to the previously current item.

const_iterator &	operator-- ()
	The prefix {–} operator, {–it}, makes the preceding item current and returns an iterator to the new current item.

const_iterator	operator-- (int)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.The postfix {–} operator, {it–}, makes the preceding item current and returns an iterator to the previously current item.

const_iterator &	operator+= (qsizetype j)
	Advances the iterator by j items.

const_iterator &	operator-= (qsizetype j)
	Makes the iterator go back by j items.

const_iterator	operator+ (qsizetype j) const
	Returns an iterator to the item at j positions forward from this iterator.

const_iterator	operator- (qsizetype j) const
	Returns an iterator to the item at j positions backward from this iterator.

qsizetype	operator- (const_iterator j) const
	Returns the number of items between the item pointed to by other and the item pointed to by this iterator.

Friends
class	QJsonArray

Detailed Description

\inmodule QtCore

The QJsonArray::const_iterator class provides an STL-style const iterator for QJsonArray.

QJsonArray::const_iterator allows you to iterate over a QJsonArray. If you want to modify the QJsonArray as you iterate over it, use QJsonArray::iterator instead. It is generally a good practice to use QJsonArray::const_iterator on a non-const QJsonArray as well, unless you need to change the QJsonArray through the iterator. Const iterators are slightly faster and improves code readability.

The default QJsonArray::const_iterator constructor creates an uninitialized iterator. You must initialize it using a QJsonArray function like QJsonArray::constBegin(), QJsonArray::constEnd(), or QJsonArray::insert() before you can start iterating.

Most QJsonArray functions accept an integer index rather than an iterator. For that reason, iterators are rarely useful in connection with QJsonArray. One place where STL-style iterators do make sense is as arguments to \l{generic algorithms}.

Multiple iterators can be used on the same array. However, be aware that any non-const function call performed on the QJsonArray will render all existing iterators undefined.

See also: QJsonArray::iterator

Definition at line 130 of file qjsonarray.h.

Member Typedef Documentation

◆ difference_type

QJsonArray::const_iterator::difference_type

Definition at line 133 of file qjsonarray.h.

◆ iterator_category

QJsonArray::const_iterator::iterator_category

A synonym for {std::random_access_iterator_tag} indicating this iterator is a random access iterator.

Definition at line 132 of file qjsonarray.h.

◆ pointer

QJsonArray::const_iterator::pointer

Definition at line 136 of file qjsonarray.h.

◆ reference

QJsonArray::const_iterator::reference

Definition at line 135 of file qjsonarray.h.

◆ value_type

QJsonArray::const_iterator::value_type

Definition at line 134 of file qjsonarray.h.

Constructor & Destructor Documentation

◆ const_iterator() [1/4]

QJsonArray::const_iterator::const_iterator ( )

inline

Constructs an uninitialized iterator.

Functions like operator*() and operator++() should not be called on an uninitialized iterator. Use operator=() to assign a value to it before using it.

See also: QJsonArray::constBegin(), QJsonArray::constEnd()

Definition at line 138 of file qjsonarray.h.

◆ const_iterator() [2/4]

QJsonArray::const_iterator::const_iterator	(	const QJsonArray *	array,
		qsizetype	index
	)

inlineexplicit

Definition at line 139 of file qjsonarray.h.

◆ const_iterator() [3/4]

QJsonArray::const_iterator::const_iterator ( const iterator & o )

inline

Constructs a copy of other.

Definition at line 141 of file qjsonarray.h.

◆ const_iterator() [4/4]

constexpr QJsonArray::const_iterator::const_iterator ( const const_iterator & other )

constexprdefault

Member Function Documentation

◆ operator!=()

bool QJsonArray::const_iterator::operator!= ( const const_iterator & other ) const

inline

Returns true if other points to a different item than this iterator; otherwise returns false.

See also: operator==()

Definition at line 156 of file qjsonarray.h.

References o.

◆ operator*()

const QJsonValueRef QJsonArray::const_iterator::operator* ( ) const

inline

Returns the current item.

Definition at line 150 of file qjsonarray.h.

References item.

◆ operator+()

QJsonArray::const_iterator QJsonArray::const_iterator::operator+ ( qsizetype j ) const

inline

Returns an iterator to the item at j positions forward from this iterator.

If j is negative, the iterator goes backward.

See also: operator-(), operator+=()

Definition at line 169 of file qjsonarray.h.

References j.

◆ operator++() [1/2]

QJsonArray::const_iterator & QJsonArray::const_iterator::operator++ ( )

inline

The prefix {++} operator, {++it}, advances the iterator to the next item in the array and returns an iterator to the new current item.

Calling this function on QJsonArray::end() leads to undefined results.

See also: operator--()

Definition at line 163 of file qjsonarray.h.

References item.

◆ operator++() [2/2]

QJsonArray::const_iterator QJsonArray::const_iterator::operator++ ( int )

inline

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.The postfix {++} operator, {it++}, advances the iterator to the next item in the array and returns an iterator to the previously current item.

Definition at line 164 of file qjsonarray.h.

References item.

◆ operator+=()

QJsonArray::const_iterator & QJsonArray::const_iterator::operator+= ( qsizetype j )

inline

Advances the iterator by j items.

If j is negative, the iterator goes backward.

See also: operator-=(), operator+()

Definition at line 167 of file qjsonarray.h.

References item, and j.

◆ operator-() [1/2]

qsizetype QJsonArray::const_iterator::operator- ( const_iterator j ) const

inline

Returns the number of items between the item pointed to by other and the item pointed to by this iterator.

Definition at line 171 of file qjsonarray.h.

References item, and j.

◆ operator-() [2/2]

QJsonArray::const_iterator QJsonArray::const_iterator::operator- ( qsizetype j ) const

inline

Returns an iterator to the item at j positions backward from this iterator.

If j is negative, the iterator goes forward.

See also: operator+(), operator-=()

Definition at line 170 of file qjsonarray.h.

References j, and operator+().

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◆ operator--() [1/2]

QJsonArray::const_iterator & QJsonArray::const_iterator::operator-- ( )

inline

The prefix {–} operator, {–it}, makes the preceding item current and returns an iterator to the new current item.

Calling this function on QJsonArray::begin() leads to undefined results.

See also: operator++()

Definition at line 165 of file qjsonarray.h.

References item.

◆ operator--() [2/2]

QJsonArray::const_iterator QJsonArray::const_iterator::operator-- ( int )

inline

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.The postfix {–} operator, {it–}, makes the preceding item current and returns an iterator to the previously current item.

Definition at line 166 of file qjsonarray.h.

References item.

◆ operator-=()

QJsonArray::const_iterator & QJsonArray::const_iterator::operator-= ( qsizetype j )

inline

Makes the iterator go back by j items.

If j is negative, the iterator goes forward.

See also: operator+=(), operator-()

Definition at line 168 of file qjsonarray.h.

References item, and j.

◆ operator->()

const QJsonValueRef * QJsonArray::const_iterator::operator-> ( ) const

inline

Returns a pointer to the current item.

Definition at line 151 of file qjsonarray.h.

References item.

◆ operator<()

bool QJsonArray::const_iterator::operator< ( const const_iterator & other ) const

inline

Returns true if the item pointed to by this iterator is less than the item pointed to by the other iterator.

Definition at line 157 of file qjsonarray.h.

References item, other(), and Q_ASSERT.

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◆ operator<=()

bool QJsonArray::const_iterator::operator<= ( const const_iterator & other ) const

inline

Returns true if the item pointed to by this iterator is less than or equal to the item pointed to by the other iterator.

Definition at line 159 of file qjsonarray.h.

References item, other(), and Q_ASSERT.

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◆ operator=()

const_iterator & QJsonArray::const_iterator::operator= ( const const_iterator & other )

inline

Definition at line 144 of file qjsonarray.h.

References item, and other().

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◆ operator==()

bool QJsonArray::const_iterator::operator== ( const const_iterator & other ) const

inline

Returns true if other points to the same item as this iterator; otherwise returns false.

See also: operator!=()

Definition at line 154 of file qjsonarray.h.

References item, and o.

◆ operator>()

bool QJsonArray::const_iterator::operator> ( const const_iterator & other ) const

inline

Returns true if the item pointed to by this iterator is greater than the item pointed to by the other iterator.

Definition at line 161 of file qjsonarray.h.

References other().

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◆ operator>=()

bool QJsonArray::const_iterator::operator>= ( const const_iterator & other ) const

inline

Returns true if the item pointed to by this iterator is greater than or equal to the item pointed to by the other iterator.

Definition at line 162 of file qjsonarray.h.

References other().

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◆ operator[]()

QJsonValue QJsonArray::const_iterator::operator[] ( qsizetype j ) const

inline

Returns the item at offset j from the item pointed to by this iterator (the item at position {*this + j}).

This function is provided to make QJsonArray iterators behave like C++ pointers.

See also: operator+()

Definition at line 153 of file qjsonarray.h.

References j.

Friends And Related Symbol Documentation

◆ QJsonArray

friend class QJsonArray

friend

Definition at line 175 of file qjsonarray.h.

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

qtbase/src/corelib/serialization/qjsonarray.h
qtbase/src/corelib/serialization/qjsonarray.cpp

Public Types

Public Member Functions

Friends

Detailed Description

Member Typedef Documentation

◆ difference_type

◆ iterator_category

◆ pointer

◆ reference

◆ value_type

Constructor & Destructor Documentation

◆ const_iterator() [1/4]

◆ const_iterator() [2/4]

◆ const_iterator() [3/4]

◆ const_iterator() [4/4]

Member Function Documentation

◆ operator!=()

◆ operator*()

◆ operator+()

◆ operator++() [1/2]

◆ operator++() [2/2]

◆ operator+=()

◆ operator-() [1/2]

◆ operator-() [2/2]

◆ operator--() [1/2]

◆ operator--() [2/2]

◆ operator-=()

◆ operator->()

◆ operator<()

◆ operator<=()

◆ operator=()

◆ operator==()

◆ operator>()

◆ operator>=()

◆ operator[]()

Friends And Related Symbol Documentation

◆ QJsonArray