tqt3/doc/tqptrstack.doc

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** TQPtrStack class documentation
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/*****************************************************************************
  TQPtrStack documentation
 *****************************************************************************/

/*!
    \class TQPtrStack tqptrstack.h
    \brief The TQPtrStack class is a template class that provides a stack.

    \ingroup tools

    TQValueStack is an STL-compatible alternative to this class.

    Define a template instance TQPtrStack\<X\> to create a stack that
    operates on pointers to X, (X*). 

    A stack is a last in, first out (LIFO) structure. Items are added
    to the top of the stack with push() and retrieved from the top
    with pop(). Use top() to get a reference to the top element
    without changing the stack.

    You can control the stack's deletion policy with setAutoDelete().

    For compatibility with the TQPtrCollection classes current() and
    remove() are provided; they both operate on the top().

    \sa TQPtrList TQPtrQueue
*/

/*!
    \fn TQPtrStack::TQPtrStack () 

    Creates an empty stack.
*/

/*!
    \fn TQPtrStack::TQPtrStack (const TQPtrStack<type>& s) 

    Creates a stack by making a shallow copy of another stack \a s.
*/

/*!
    \fn TQPtrStack::~TQPtrStack () 

    Destroys the stack. All items will be deleted if autoDelete() is
    TRUE.
*/

/*!
    \fn TQPtrStack<type>& TQPtrStack::operator= (const TQPtrStack<type>& s) 

    Sets the contents of this stack by making a shallow copy of
    another stack \a s. Elements currently in this stack will be
    deleted if autoDelete() is TRUE.
*/

/*!
    \fn bool TQPtrStack::isEmpty () const 

    Returns TRUE if the stack contains no elements; otherwise returns
    FALSE.
*/

/*!
    \fn void TQPtrStack::push (const type* d) 

    Adds an element \a d to the top of the stack. Last in, first out.
*/

/*!
    \fn type* TQPtrStack::pop () 

    Removes the top item from the stack and returns it. The stack must
    not be empty.
*/

/*!
    \fn bool TQPtrStack::remove () 

    Removes the top item from the stack and deletes it if autoDelete()
    is TRUE. Returns TRUE if there was an item to pop; otherwise
    returns FALSE.

    \sa clear()
*/

/*!
    \fn void TQPtrStack::clear()

    Removes all items from the stack, deleting them if autoDelete() is
    TRUE.

    \sa remove()
*/

/*!
    \fn uint TQPtrStack::count() const

    Returns the number of items in the stack.

    \sa isEmpty()
*/

/*!
    \fn type* TQPtrStack::top () const 

    Returns a pointer to the top item on the stack (most recently
    pushed). The stack is not changed. Returns 0 if the stack is
    empty.
*/

/*!
    \fn TQPtrStack::operator type* ()const 

    Returns a pointer to the top item on the stack (most recently
    pushed). The stack is not changed. Returns 0 if the stack is
    empty.
*/

/*!
    \fn type* TQPtrStack::current () const 

    Returns a pointer to the top item on the stack (most recently
    pushed). The stack is not changed. Returns 0 if the stack is
    empty.
*/

/*!
    \fn bool TQPtrStack::autoDelete() const

    The same as TQPtrCollection::autoDelete().

    \sa setAutoDelete()
*/

/*!
    \fn void TQPtrStack::setAutoDelete( bool enable ) 

    Defines whether this stack auto-deletes its contents. The same as
    TQPtrCollection::setAutoDelete().

    If \a enable is TRUE the stack auto-deletes its contents; if \a
    enable is FALSE the stack does not delete its contents.
    
    \sa autoDelete()
*/

/*!
    \fn TQDataStream& TQPtrStack::read( TQDataStream& s,
					TQPtrCollection::Item& item )

    Reads a stack item, \a item, from the stream \a s and returns a
    reference to the stream.

    The default implementation sets \a item to 0.

    \sa write()
*/

/*!
    \fn TQDataStream& TQPtrStack::write( TQDataStream& s,
					TQPtrCollection::Item item ) const

    Writes a stack item, \a item, to the stream \a s and returns a
    reference to the stream.

    The default implementation does nothing.

    \sa read()
*/