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# QStack Class Reference

The QStack class is a template class that provides a stack. More...

`#include <qstack.h>`

List of all member functions.

## Public Members

- QStack ()
- QStack ( const QStack<type> & s )
- ~QStack ()
- QStack<type>& operator= ( const QStack<type> & s )
- bool autoDelete () const
- void setAutoDelete ( bool enable )
- virtual uint count () const
- bool isEmpty () const
- void push ( const type * d )
- type* pop ()
- bool remove ()
- virtual void clear ()
- type* top () const
- operator type* ()const
- type* current () const

## Detailed Description

The QStack class is a template class that provides a stack.

QStack is implemented as a template class. Define a template instance QStack<X> to create a stack that operates on pointers to X, or 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().

See also Collection Classes

## Member Function Documentation

### QStack::QStack ()

Creates and empty stack.

### QStack::QStack ( const QStack<type> & s )

Creates a stack by making a shallow copy of another stack.

### QStack::~QStack ()

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

### QStack::operator type* () const

Returns a reference to the top item on the stack (most recently pushed). The stack is not changed.

### bool QStack::autoDelete () const

The same as QCollection::autoDelete().

See also setAutoDelete().

### void QStack::clear () `[virtual]`

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

See also remove().

Reimplemented from QCollection.

### uint QStack::count () const `[virtual]`

Returns the number of items in the stack.

See also isEmpty().

Reimplemented from QCollection.

### type* QStack::current () const

Returns a reference to the top item on the stack (most recently pushed). The stack is not changed.

### bool QStack::isEmpty () const

Returns TRUE is the stack contains no elements to be popped

### QStack<type>& QStack::operator= ( const QStack<type> & s )

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

### type* QStack::pop ()

Removes the top item from the stack and returns it.

### void QStack::push ( const type * d )

Adds an element to the top of the stack. Last in, first out.

### bool QStack::remove ()

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

See also clear().

### void QStack::setAutoDelete ( bool enable )

The same as QCollection::setAutoDelete().

See also autoDelete().

### type* QStack::top () const

Returns a reference to the top item on the stack (most recently pushed). The stack is not changed.

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