File : bc-containers-stacks-unbounded.ads
-- Copyright (C) 1994-1999 Grady Booch, David Weller and Simon Wright.
-- All Rights Reserved.
--
-- This program is free software; you can redistribute it
-- and/or modify it under the terms of the Ada Community
-- License which comes with this Library.
--
-- This program is distributed in the hope that it will be
-- useful, but WITHOUT ANY WARRANTY; without even the implied
-- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-- PURPOSE. See the Ada Community License for more details.
-- You should have received a copy of the Ada Community
-- License with this library, in the file named "Ada Community
-- License" or "ACL". If not, contact the author of this library
-- for a copy.
--
-- $Id: bc-containers-stacks-unbounded.ads,v 1.5.2.2 1999/12/31 15:11:24 simon Exp $
with BC.Support.Unbounded;
with System.Storage_Pools;
generic
type Storage_Manager (<>)
is new System.Storage_Pools.Root_Storage_Pool with private;
Storage : in out Storage_Manager;
package BC.Containers.Stacks.Unbounded is
pragma Elaborate_Body;
type Unbounded_Stack is new Stack with private;
-- This Stack exhibits unlimited growth and collapsing, limited only by
-- available memory. Assignment is "deep".
function "=" (Left, Right : in Unbounded_Stack) return Boolean;
-- Return True if and only if both stacks have the same depth and the
-- same items in the same order; return False otherwise.
procedure Clear (S : in out Unbounded_Stack);
-- Empty the Stack of all items.
procedure Push (S : in out Unbounded_Stack; Elem : Item);
-- Add a copy of the item to the top of the Stack.
procedure Pop (S : in out Unbounded_Stack);
-- Remove the item from the top of the Stack.
function Depth (S : in Unbounded_Stack) return Natural;
-- Returns the number of items in the Stack
function Is_Empty (S : in Unbounded_Stack) return Boolean;
-- Returns True if and only if no items are in the stack
function Top (S : in Unbounded_Stack) return Item;
-- Return a copy of the item at the top of the Stack.
function New_Iterator (For_The_Stack : Unbounded_Stack) return Iterator;
-- Return a reset Iterator bound to the specific Stack.
private
function Cardinality (S : Unbounded_Stack) return Natural;
function Item_At (S : Unbounded_Stack; Index : Positive) return Item_Ptr;
procedure Purge (S : in out Unbounded_Stack);
procedure Add (S : in out Unbounded_Stack; Elem : Item);
procedure Remove (S : in out Unbounded_Stack; From : Positive);
package Unbounded_Stack_Nodes
is new BC.Support.Unbounded (Item => Item,
Item_Ptr => Item_Ptr,
Storage_Manager => Storage_Manager,
Storage => Storage);
type Unbounded_Stack is new Stack with record
Rep : Unbounded_Stack_Nodes.Unb_Node_Ref
:= new Unbounded_Stack_Nodes.Unb_Node;
end record;
procedure Initialize (S : in out Unbounded_Stack);
procedure Adjust (S : in out Unbounded_Stack);
procedure Finalize (S : in out Unbounded_Stack);
end BC.Containers.Stacks.Unbounded;