const_iterator Class
(Qt3D::QCircularBuffer::const_iterator)The Qt3D::QCircularBuffer::const_iterator class provides an STL-style const iterator for QCircularBuffer. More...
Header: | #include <Qt3D> |
qmake: | QT += 3dcore |
Public Types
typedef | iterator_category |
Public Functions
const_iterator() | |
const_iterator(const QCircularBuffer<T> * buff, int idx) | |
bool | operator!=(const const_iterator & other) const |
const T & | operator*() const |
const_iterator | operator+(int j) const |
const_iterator & | operator++() |
const_iterator | operator++(int) |
const_iterator & | operator+=(int j) |
const_iterator | operator-(int j) const |
int | operator-(const_iterator other) const |
const_iterator & | operator--() |
const_iterator | operator--(int) |
const_iterator & | operator-=(int j) |
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 |
const T & | operator[](int j) const |
Detailed Description
The Qt3D::QCircularBuffer::const_iterator class provides an STL-style const iterator for QCircularBuffer.
QCircularBuffer provides both STL-Style Iterators and Java-Style Iterators.
See also Qt3D::QCircularBuffer::constBegin(), Qt3D::QCircularBuffer::constEnd(), and Qt3D::QCircularBuffer::iterator.
Member Type Documentation
typedef const_iterator::iterator_category
A synonym for std::random_access_iterator_tag indicating this iterator is a random access iterator.
Member Function Documentation
const_iterator::const_iterator()
Constructs an uninitialized const 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 Qt3D::QCircularBuffer::begin() and Qt3D::QCircularBuffer::end().
const_iterator::const_iterator(const QCircularBuffer<T> * buff, int idx)
bool const_iterator::operator!=(const const_iterator & other) const
Returns true if other points to a different item than this iterator; otherwise returns false.
See also operator==().
const T & const_iterator::operator*() const
Returns a const reference to the current item.
See also operator->().
const_iterator const_iterator::operator+(int j) const
Returns an iterator to the item at j positions forward from this iterator. (If j is negative, the iterator goes backward.)
See also operator-() and operator+=().
const_iterator & const_iterator::operator++()
The prefix ++ operator (++it
) advances the iterator to the next item in the circular buffer and returns an iterator to the new current item.
Calling this function on Qt3D::QCircularBuffer::constEnd() leads to undefined results.
See also operator--().
const_iterator const_iterator::operator++(int)
This is an overloaded function.
The postfix ++ operator (it++
) advances the iterator to the next item in the circular buffer and returns an iterator to the previously current item.
const_iterator & const_iterator::operator+=(int j)
Advances the iterator by j items. (If j is negative, the iterator goes backward.)
See also operator-=() and operator+().
const_iterator const_iterator::operator-(int j) const
Returns an iterator to the item at j positions backward from this iterator. (If j is negative, the iterator goes forward.)
See also operator+() and operator-=().
int const_iterator::operator-(const_iterator other) const
Returns the number of items between the item pointed to by other and the item pointed to by this iterator.
const_iterator & const_iterator::operator--()
The prefix -- operator (--it
) makes the preceding item the current and returns an iterator to the new current item.
Calling this function on Qt3D::QCircularBuffer::constBegin() leads to undefined results.
See also operator++().
const_iterator const_iterator::operator--(int)
This is an overloaded function.
The postfix -- operator (it--
) makes the preceding item the current and returns an iterator to the previously current item.
const_iterator & const_iterator::operator-=(int j)
Makes the iterator go back by j items. (If j is negative, the iterator goes forward.)
See also operator+=() and operator-().
const T * const_iterator::operator->() const
Returns a pointer to the current item.
See also operator*().
bool const_iterator::operator<(const const_iterator & other) const
Returns true if the item pointed to by this iterator occurs before the item pointed to by the other iterator.
bool const_iterator::operator<=(const const_iterator & other) const
Returns true if the item pointed to by this iterator occurs before, or at the same position as the item pointed to by the other iterator.
bool const_iterator::operator==(const const_iterator & other) const
Returns true if other points to the same item as this iterator; otherwise returns false.
See also operator!=().
bool const_iterator::operator>(const const_iterator & other) const
Returns true if the item pointed to by this iterator occurs after the item pointed to by the other iterator.
bool const_iterator::operator>=(const const_iterator & other) const
Returns true if the item pointed to by this iterator occurs after, or at the same position as the item pointed to by the other iterator.
const T & const_iterator::operator[](int j) const
Returns a const reference to the item at position *this + j.
This function is provided to make QCircularBuffer iterators behave like C++ pointers.
See also operator+().