QDjango
Public Types | Public Member Functions | Friends | List of all members
QDjangoQuerySet< T >::const_iterator Class Reference

#include <QDjangoQuerySet.h>

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_iteratoroperator++ ()
 
const_iterator operator++ (int)
 
const_iteratoroperator+= (int i)
 
const_iterator operator+ (int i) const
 
const_iteratoroperator-= (int i)
 
const_iterator operator- (int i) const
 
const_iteratoroperator-- ()
 
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:

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: