ReverseConstHashIterator Class Reference

reverse constant iterator class for QoreHashNode, to be only created on the stack More...

`#include <QoreHashNode.h>`

Inheritance diagram for ReverseConstHashIterator:
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Collaboration diagram for ReverseConstHashIterator:
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## Public Member Functions

DLLEXPORT | ReverseConstHashIterator (const QoreHashNode *h)
| initializes the iterator with the passed hash
DLLEXPORT | ReverseConstHashIterator (const QoreHashNode &h)
| initializes the iterator with the passed hash
DLLEXPORT | ~ReverseConstHashIterator ()
| Destroys the iterator.
DLLEXPORT bool | first () const
| returns true if on the last key of the hash
DLLEXPORT bool | last () const
| returns true if on the first key of the hash
DLLEXPORT bool | next ()
| moves to the next element in reverse order, returns false when there are no more elements to iterate More...
DLLEXPORT bool | prev ()
| moves to the previous element in reverse order, returns false when there are no more elements to iterate More...
Public Member Functions inherited from ConstHashIterator
DLLEXPORT | ConstHashIterator (const QoreHashNode *h)
| initializes the iterator with the passed hash
DLLEXPORT | ConstHashIterator (const QoreHashNode &h)
| initializes the iterator with the passed hash
DLLLOCAL | ConstHashIterator (const ConstHashIterator &)
| copy constructor
DLLEXPORT | ~ConstHashIterator ()
| Destroys the iterator.
DLLEXPORT bool | empty () const
| returns true if the hash is empty
DLLEXPORT bool | first () const
| returns true if on the first key of the hash
DLLEXPORT const QoreValue | get () const
| returns the value of the current key
DLLEXPORT const QoreHashNode * | getHash () const
| returns the hash
DLLEXPORT const char * | getKey () const
| returns the current key
DLLEXPORT QoreString * | getKeyString () const
| returns a QoreString for the current key, the caller owns QoreString returned
DLLEXPORT QoreValue | getReferenced () const
| returns the value of the current key with an incremented reference count
DLLEXPORT const QoreTypeInfo * | getTypeInfo () const
| returns the type info for the current value
DLLEXPORT bool | last () const
| returns true if on the last key of the hash
DLLEXPORT bool | next ()
| moves to the next element, returns false when there are no more elements to iterate More...
DLLEXPORT bool | prev ()
| moves to the previous element, returns false when there are no more elements to iterate More...
DLLEXPORT void | reset ()
| resets the iterator to its initial state
DLLEXPORT bool | valid () const
| returns true if the iterator is currently pointing at a valid element

## Additional Inherited Members

Protected Member Functions inherited from ConstHashIterator
DLLLOCAL ConstHashIterator & | operator= (const HashIterator &)
| this function is not implemented; it is here as a protected function in order to prohibit it from being used

## Detailed Description

reverse constant iterator class for QoreHashNode, to be only created on the stack

ReverseConstHashIterator hi(h);
while (hi.next()) {
QoreStringValueHelper str(hi.get());
printf("key: '%s', value: '%s'\n", hi.getKey(), str->getBuffer());
}

## Member Function Documentation

## next()

DLLEXPORT bool ReverseConstHashIterator::next | ( |  | ) |

moves to the next element in reverse order, returns false when there are no more elements to iterate

also moves to the last element if the object has just been initialized after a complete iteration (assuming there is at least one element in the hash)

## prev()

DLLEXPORT bool ReverseConstHashIterator::prev | ( |  | ) |

moves to the previous element in reverse order, returns false when there are no more elements to iterate

also moves to the first element if the object has just been initialized after a complete iteration (assuming there is at least one element in the hash)

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

- include/qore/QoreHashNode.h