"======================================================================
|
|   IdentityDictionary Method Definitions
|
|   $Revision: 1.7.5$
|   $Date: 2000/05/28 16:56:52$
|   $Author: pb$
|
 ======================================================================"


"======================================================================
|
| Copyright 1988-92, 1994-95, 1999, 2000 Free Software Foundation, Inc.
| Written by Steve Byrne and Paolo Bonzini.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
| 
| The GNU Smalltalk class library 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 GNU Lesser
| General Public License for more details.
| 
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LESSER.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02111-1307, USA.  
|
 ======================================================================"

LookupTable variableSubclass: #IdentityDictionary
	   instanceVariableNames: ''
	   classVariableNames: ''
	   poolDictionaries: ''
	   category: 'Collections-Keyed'
!

IdentityDictionary comment:
'I am similar to LookupTable, except that I use the object identity
comparision message == to determine equivalence of indices.' !


!IdentityDictionary methodsFor: 'private methods'!

hashFor: anElement

    "Answer the hash value for anElement"

    ^anElement identityHash
!

keysClass
    "Answer the class answered by #keys"
    ^IdentitySet
!

is: anElement sameAs: searchedObject

    "Answer whether findIndex: should stop scanning the receiver: anElement has
     been found and findIndex:'s parameter was searchedObject"

    ^anElement == searchedObject
! !