QTaggedIterator 是包裹迭代器并暴露标准迭代器特质的模板类。 更多...
| 头： | #include <QTaggedIterator> |
| CMake: |
find_package(Qt6 REQUIRED COMPONENTS Core)
target_link_libraries(mytarget PRIVATE Qt6::Core) |
| qmake: | QT += core |
| Since: | Qt 6.0 |
| QTaggedIterator (Iterator && it ) | |
| bool | operator!= (const QTaggedIterator<Iterator, IteratorCategory> & other ) const |
| QTaggedIterator<Iterator, IteratorCategory> | operator+ (qsizetype j ) const |
| QTaggedIterator<Iterator, IteratorCategory> & | operator++ () |
| QTaggedIterator<Iterator, IteratorCategory> | operator++ (int x ) |
| QTaggedIterator<Iterator, IteratorCategory> & | operator+= (qsizetype j ) |
| QTaggedIterator<Iterator, IteratorCategory> | operator- (qsizetype j ) const |
| qsizetype | operator- (const QTaggedIterator<Iterator, IteratorCategory> & j ) const |
| QTaggedIterator<Iterator, IteratorCategory> & | operator-- () |
| QTaggedIterator<Iterator, IteratorCategory> | operator-- (int x ) |
| QTaggedIterator<Iterator, IteratorCategory> & | operator-= (qsizetype j ) |
| bool | operator== (const QTaggedIterator<Iterator, IteratorCategory> & other ) const |
| QTaggedIterator<Iterator, IteratorCategory> | operator+ (qsizetype j , const QTaggedIterator<Iterator, IteratorCategory> & k ) |
In order to use an iterator any of the standard algorithms, its iterator traits need to be known. As QSequentialIterable can work with many different kinds of containers, we cannot declare the traits in the iterator classes themselves. A QTaggedIterator gives you a way to explicitly declare a trait for a concrete instance of an iterator or QConstIterator .
Constructs a QTaggedIterator from an iterator or QConstIterator it . Checks whether the IteratorCategory passed as template argument matches the run time capabilities of it ; if there's no match, it is refused.
返回
true
if
other
指向与此迭代器不同的项；否则返回
false
.
另请参阅 operator== ().
Returns an iterator to the item at j positions forward from this iterator.
另请参阅 operator- () 和 operator+= ().
The prefix
++
operator (
++it
) advances the iterator to the next item in the container and returns an iterator to the new current item.
Calling this function on QSequentialIterable::end() leads to undefined results.
另请参阅 operator-- ().
这是重载函数。
The postfix
++
operator (
it++
) advances the iterator to the next item in the container and returns an iterator to the previously current item.
Advances the iterator by j 项。
另请参阅 operator-= () 和 operator+ ().
Returns an iterator to the item at j positions backward from this iterator.
If the container in the QVariant does not support bi-directional iteration, calling this function leads to undefined results.
另请参阅 operator+ (), operator-= ()，和 QIterable::canReverseIterate ().
Returns the distance between this iterator and j .
另请参阅 operator+ (), operator-= ()，和 QIterable::canReverseIterate ().
The prefix
--
operator (
--it
) makes the preceding item current and returns an iterator to the new current item.
Calling this function on QSequentialIterable::begin() leads to undefined results.
If the container in the QVariant does not support bi-directional iteration, calling this function leads to undefined results.
另请参阅 operator++ () 和 QIterable::canReverseIterate ().
这是重载函数。
The postfix
--
operator (
it--
) makes the preceding item current and returns an iterator to the previously current item.
If the container in the QVariant does not support bi-directional iteration, calling this function leads to undefined results.
另请参阅 QIterable::canReverseIterate ().
Makes the iterator go back by j 项。
If the container in the QVariant does not support bi-directional iteration, calling this function leads to undefined results.
另请参阅 operator+= (), operator- ()，和 QIterable::canReverseIterate ().
返回
true
if
other
points to the same item as this iterator; otherwise returns
false
.
另请参阅 operator!= ().
Returns an iterator to the item at j positions forward from iterator k .
