STL style const iterator for QHash. More...
Public Methods | |
| const_iterator () = default | |
| const_iterator (iterator other) | |
| const Key & | key () const |
| bool | operator!= (const_iterator other) const |
| const Val & | operator* () const |
| const_iterator | operator+ (size_type n) const |
| const_iterator & | operator++ () |
| const_iterator | operator++ (int) |
| const_iterator & | operator+= (size_type n) |
| const_iterator | operator- (size_type n) const |
| const_iterator & | operator-= (size_type n) |
| const Val * | operator-> () const |
| bool | operator== (const_iterator other) const |
| const std::pair< const Key, Val > & | pair () const |
| const Val & | value () const |
Friends | |
| bool | operator!= (iterator iter1, const_iterator iter2) |
| bool | operator== (iterator iter1, const_iterator iter2) |
| class | QHash< Key, Val, Hash, KeyEqual > |
Detailed Description
template<typename Key, typename Val, typename Hash, typename KeyEqual>
class QHash< Key, Val, Hash, KeyEqual >::const_iterator
The QHash::const_iterator class provides an STL style const iterator for QHash. QHash features both STL style iterators and Java style iterators.
QHash::const_iterator allows you to iterate over a QHash. If you want to modify the QHash as you iterate over it use QHash::iterator instead.
After construction you must initialize the iterator using a method like QHash::constBegin(), QHash::constEnd(), or QHash::find() before you can start iterating. The following is an example which prints all of the (key, value) pairs in the container.
Unlike QMap which orders its items by key, QHash stores its items in an arbitrary order.
- See also
- QHash::iterator
Constructor & Destructor Documentation
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default |
Constructs an uninitialized iterator.
Methods like key(), value(), and operator++() must not be called on an uninitialized iterator. Use operator=() to assign a value to it before using it.
- See also
- QHash::constBegin(), QHash::constEnd()
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inline |
Constructs a copy of other.
Method Documentation
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inline |
Returns the current item's key.
- See also
- value()
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inline |
Returns true if other points to a different item than this iterator, otherwise it returns false.
- See also
- operator==()
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inline |
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inline |
Returns an iterator to the item at n positions forward from this iterator. If n is negative, the iterator goes backward.
This operation can be slow for large values of n.
- See also
- operator-()
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inline |
The prefix ++ operator (++i) advances the iterator to the next item in the hash and returns an iterator to the new current item.
Calling this method on QHash::end() leads to undefined behavior.
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inline |
The postfix ++ operator (i++) advances the iterator to the next item in the hash and returns an iterator to the previously current item.
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inline |
Advances the iterator by n items. If n is negative the iterator goes backward.
This operation can be slow for large values of n.
- See also
- operator-=(), operator+()
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inline |
Returns an iterator to the item at n positions backward from this iterator. If n is negative the iterator goes forward.
This operation can be slow for large values of n.
- See also
- operator+()
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inline |
Makes the iterator go back by n items. If n is negative the iterator goes forward.
This operation can be slow for large values of n.
- See also
- operator+=(), operator-()
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inline |
Returns a pointer to the current item's value.
- See also
- value()
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inline |
Returns true if other points to the same item as this iterator, otherwise it returns false.
- See also
- operator!=()
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inline |
Returns the current item's key and value as a pair.
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inline |
Returns the current item's value.
- See also
- key(), operator*()
Friends And Related Function Documentation
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friend |
Returns true if iter1 points to a different item than iter2, otherwise it returns false.
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friend |
Returns true if iter1 points to the same item as iter2, otherwise it returns false.
- Generated on Thu Feb 29 2024 16:30 by
1.6.0