# ACE_Unbounded_Stack< T > Class Template Reference

Implement a generic LIFO abstract data type. More...

`#include <Containers_T.h>`

Collaboration diagram for ACE_Unbounded_Stack< T >:

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List of all members.

## Public Types

typedef ACE_Unbounded_Stack_Iterator< T > | ITERATOR

## Public Member Functions

| ACE_Unbounded_Stack (ACE_Allocator *the_allocator=0)
| ACE_Unbounded_Stack (const ACE_Unbounded_Stack< T > &s)
| The copy constructor (performs initialization).
void | operator= (const ACE_Unbounded_Stack< T > &s)
| Assignment operator (performs assignment).
| ~ACE_Unbounded_Stack (void)
| Perform actions needed when stack goes out of scope.
int | push (const T &new_item)
| Push an element onto the top of stack.
int | pop (T &item)
| Pop the top element of the stack.
int | top (T &item) const
| Examine the top of the stack.
int | is_empty (void) const
| Returns 1 if the container is empty, otherwise returns 0.
int | is_full (void) const
| Returns 1 if the container is full, otherwise returns 0.
int | insert (const T &new_item)
| Linear Insert of an item.
int | remove (const T &item)
int | find (const T &item) const
| Finds if item occurs the set. Returns 0 if finds, else -1.
size_t | size (void) const
| The number of items in the stack.
void | dump (void) const
| Dump the state of an object.

## Public Attributes

| ACE_ALLOC_HOOK_DECLARE
| Declare the dynamic allocation hooks.

## Private Member Functions

void | delete_all_nodes (void)
| Delete all the nodes in the stack.
void | copy_all_nodes (const ACE_Unbounded_Stack< T > &s)
| Copy all nodes from {s} to {this}.

## Private Attributes

ACE_Node< T > * | head_
| Head of the linked list of Nodes.
size_t | cur_size_
| Current size of the stack.
ACE_Allocator * | allocator_
| Allocation strategy of the stack.

## Friends

class | ACE_Unbounded_Stack_Iterator<T>

## Detailed Description

### template<class T>
class ACE_Unbounded_Stack< T >

Implement a generic LIFO abstract data type.

This implementation of an unbounded Stack uses a linked list. If you use the {insert} or {remove} methods you should keep in mind that duplicate entries aren't allowed. In general, therefore, you should avoid the use of these methods since they aren't really part of the ADT stack. The stack is implemented as a doubly linked list.

Requirements and Performance Characteristics

- Internal Structure Double linked list
- Duplicates allowed? No
- Random access allowed? No
- Search speed Linear
- Insert/replace speed Linear
- Iterator still valid after change to container? Yes
- Frees memory for removed elements? Yes
- Items inserted by Value
- Requirements for contained type
  1. Default constructor
  2. Copy constructor
  3. operator=

## Member Typedef Documentation

template<class T>
typedef ACE_Unbounded_Stack_Iterator<T> ACE_Unbounded_Stack< T >::ITERATOR

## Constructor & Destructor Documentation

template<class T>
ACE_Unbounded_Stack< T >::ACE_Unbounded_Stack | ( | ACE_Allocator * | the_allocator = `0` | ) |

| Initialize an empty stack using the user specified allocation strategy if provided.

template<class T>
ACE_Unbounded_Stack< T >::ACE_Unbounded_Stack | ( | const ACE_Unbounded_Stack< T > & | s | ) |

| The copy constructor (performs initialization). Initialize this stack to be an exact copy of {s}.

template<class T>
ACE_Unbounded_Stack< T >::~ACE_Unbounded_Stack | ( | void |  | ) |

| Perform actions needed when stack goes out of scope. Destroy the underlying list for the stack.

## Member Function Documentation

template<class T>
void ACE_Unbounded_Stack< T >::copy_all_nodes | ( | const ACE_Unbounded_Stack< T > & | s | ) | `[private]`

| Copy all nodes from {s} to {this}.

template<class T>
void ACE_Unbounded_Stack< T >::delete_all_nodes | ( | void |  | ) | `[private]`

| Delete all the nodes in the stack.

template<class T>
void ACE_Unbounded_Stack< T >::dump | ( | void |  | ) | const

| Dump the state of an object.

template<class T>
int ACE_Unbounded_Stack< T >::find | ( | const T & | item | ) | const

| Finds if item occurs the set. Returns 0 if finds, else -1. Linear find operation.

template<class T>
int ACE_Unbounded_Stack< T >::insert | ( | const T & | new_item | ) |

| Linear Insert of an item. Insert {new_item} into the Stack at the head (but doesn't allow duplicates). Returns -1 if failures occur, 1 if item is already present (i.e., no duplicates are allowed), else 0.

template<class T>
ACE_INLINE int ACE_Unbounded_Stack< T >::is_empty | ( | void |  | ) | const

| Returns 1 if the container is empty, otherwise returns 0. Constant time check to see if the stack is empty.

template<class T>
ACE_INLINE int ACE_Unbounded_Stack< T >::is_full | ( | void |  | ) | const

| Returns 1 if the container is full, otherwise returns 0. Always resturns 0 since the stack is unbounded.

template<class T>
void ACE_Unbounded_Stack< T >::operator= | ( | const ACE_Unbounded_Stack< T > & | s | ) |

| Assignment operator (performs assignment). Perform a deep copy of the rhs into the lhs.

template<class T>
int ACE_Unbounded_Stack< T >::pop | ( | T & | item | ) |

| Pop the top element of the stack. Remove and return the top stack item. Returns -1 if the stack is already empty, 0 if the stack is not already empty, and -1 if failure occurs.

template<class T>
int ACE_Unbounded_Stack< T >::push | ( | const T & | new_item | ) |

| Push an element onto the top of stack. Place a new item on top of the stack. Returns -1 if the stack is already full, 0 if the stack is not already full, and -1 if failure occurs.

template<class T>
int ACE_Unbounded_Stack< T >::remove | ( | const T & | item | ) |

| Linear remove operation.

template<class T>
ACE_INLINE size_t ACE_Unbounded_Stack< T >::size | ( | void |  | ) | const

| The number of items in the stack. Constant time access to the current stack size.

template<class T>
ACE_INLINE int ACE_Unbounded_Stack< T >::top | ( | T & | item | ) | const

| Examine the top of the stack. Return top stack item without removing it. Returns -1 if the stack is already empty, 0 if the stack is not already empty, and -1 if failure occurs.

## Friends And Related Function Documentation

template<class T>
friend class ACE_Unbounded_Stack_Iterator<T>`[friend]`

## Member Data Documentation

template<class T>
ACE_Unbounded_Stack< T >::ACE_ALLOC_HOOK_DECLARE

| Declare the dynamic allocation hooks.

template<class T>
ACE_Allocator* ACE_Unbounded_Stack< T >::allocator_ `[private]`

| Allocation strategy of the stack.

template<class T>
size_t ACE_Unbounded_Stack< T >::cur_size_ `[private]`

| Current size of the stack.

template<class T>
ACE_Node<T>* ACE_Unbounded_Stack< T >::head_ `[private]`

| Head of the linked list of Nodes.

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

- Containers_T.h
- Containers_T.cpp
- Containers_T.inl