QDjangoQuerySet< T >::const_iterator Class Reference

#include <QDjangoQuerySet.h>

List of all members.

Public Types
typedef std::bidirectional_iterator_tag	iterator_category
Public Member Functions
	const_iterator ()
	const_iterator (const const_iterator &other)
const T &	operator* () const
const T *	operator-> () const
bool	operator== (const const_iterator &other) const
bool	operator!= (const const_iterator &other) const
bool	operator< (const const_iterator &other) const
bool	operator<= (const const_iterator &other) const
bool	operator> (const const_iterator &other) const
bool	operator>= (const const_iterator &other) const
const_iterator &	operator++ ()
const_iterator	operator++ (int)
const_iterator &	operator+= (int i)
const_iterator	operator+ (int i) const
const_iterator &	operator-= (int i)
const_iterator	operator- (int i) const
const_iterator &	operator-- ()
const_iterator	operator-- (int)
difference_type	operator- (const const_iterator &other) const
Friends
class	QDjangoQuerySet

---

Detailed Description

template<class T>
class QDjangoQuerySet< T >::const_iterator

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

QDjangoQuerySet::const_iterator allows you to iterate over a QDjangoQuerySet. As a const iterator it doesn't permit you to modify the QDjangoQuerySet.

The default QDjangoQuerySet::const_iterator constructor creates an uninitialized iterator. You must initialize it using a QDjangoQuerySet function like QDjangoQuerySet::constBegin(), or QDjangoQuerySet::constEnd() before you can start iterating. Here's a typical loop that prints all the objects stored in a set:

  QDjangoQuerySet<Weblog::Post> posts;

  foreach(const Weblog::Post &p, posts) {
      cout << p << endl;
  }

---

Member Typedef Documentation

template<class T>

typedef std::bidirectional_iterator_tag QDjangoQuerySet< T >::const_iterator::iterator_category

A synonym for std::bidirectional_iterator_tag indicating this iterator permits bidirectional access.

---

Constructor & Destructor Documentation

template<class T>

QDjangoQuerySet< T >::const_iterator::const_iterator

(

)

[inline]

Constructs an uninitialized iterator.

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

See also:

See also QDjangoQuerySet::constBegin() and QDjangoQuerySet::constEnd().

template<class T>

QDjangoQuerySet< T >::const_iterator::const_iterator

(

const const_iterator &

other

)

[inline]

Constructs a copy of other.

---

Member Function Documentation

template<class T>

bool QDjangoQuerySet< T >::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==()

template<class T>

const T& QDjangoQuerySet< T >::const_iterator::operator*

(

)

const [inline]

Returns the current item.

See also:

operator->()

template<class T>

const_iterator QDjangoQuerySet< T >::const_iterator::operator+

(

int

i

)

const [inline]

Returns an iterator to the item at i positions forward from this iterator. (If i is negative, the iterator goes backward.)

See also:

operator-() and operator+=()

template<class T>

const_iterator& QDjangoQuerySet< T >::const_iterator::operator++

(

)

[inline]

The prefix ++ operator (++it) advances the iterator to the next item in the set and returns an iterator to the new current item.

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

See also:

operator--()

template<class T>

const_iterator QDjangoQuerySet< T >::const_iterator::operator++

(

int

)

[inline]

The postfix ++ operator (it++) advances the iterator to the next item in the set and returns an iterator to the previously current item.

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

See also:

operator--(int)

template<class T>

const_iterator& QDjangoQuerySet< T >::const_iterator::operator+=

(

int

i

)

[inline]

Advances the iterator by i items. (If i is negative, the iterator goes backward.)

See also:

operator-=() and operator+().

template<class T>

const_iterator QDjangoQuerySet< T >::const_iterator::operator-

(

int

i

)

const [inline]

Returns an iterator to the item at i positions backward from this iterator. (If i is negative, the iterator goes forward.)

See also:

operator+() and operator-=()

template<class T>

difference_type QDjangoQuerySet< T >::const_iterator::operator-

(

const const_iterator &

other

)

const [inline]

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

template<class T>

const_iterator& QDjangoQuerySet< T >::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 QDjangoQuerySet::begin() leads to undefined results.

See also:

operator++().

template<class T>

const_iterator QDjangoQuerySet< T >::const_iterator::operator--

(

int

)

[inline]

The postfix -- operator (it--) makes the preceding item current and returns an iterator to the previously current item.

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

See also:

operator++(int).

template<class T>

const_iterator& QDjangoQuerySet< T >::const_iterator::operator-=

(

int

i

)

[inline]

Makes the iterator go back by i items. (If i is negative, the iterator goes forward.)

See also:

operator+=() and operator-()

template<class T>

const T* QDjangoQuerySet< T >::const_iterator::operator->

(

)

const [inline]

Returns a pointer to the current item.

See also:

operator*()

template<class T>

bool QDjangoQuerySet< T >::const_iterator::operator<

(

const const_iterator &

other

)

const [inline]

Returns true if other points to a position behind this iterator; otherwise returns false.

template<class T>

bool QDjangoQuerySet< T >::const_iterator::operator<=

(

const const_iterator &

other

)

const [inline]

Returns true if other points to a position behind or equal this iterator; otherwise returns false.

template<class T>

bool QDjangoQuerySet< T >::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!=()

template<class T>

bool QDjangoQuerySet< T >::const_iterator::operator>

(

const const_iterator &

other

)

const [inline]

Returns true if other points to a position before this iterator; otherwise returns false.

template<class T>

bool QDjangoQuerySet< T >::const_iterator::operator>=

(

const const_iterator &

other

)

const [inline]

Returns true if other points to a position before or equal this iterator; otherwise returns false.

---

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

• QDjangoQuerySet.h