#REFACTORING by exept
class: Smalltalk class
changed: #recursiveInstallAutoloadedClassesFrom:rememberIn:maxLevels:noAutoload:packageTop:showSplashInLevels:
Transcript showCR:(... bindWith:...) -> Transcript showCR:... with:...
"
COPYRIGHT (c) 2016 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
"{ Package: 'stx:libbasic' }"
"{ NameSpace: Smalltalk }"
Object subclass:#VoidObject
instanceVariableNames:''
classVariableNames:'TheOneAndOnlyVoid'
poolDictionaries:''
category:'Kernel-Objects'
!
!VoidObject class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2016 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
!
documentation
"
there is only one instance of this class: Void,
representing a void value.
This is mainly present for Scheme-like read-eval-print loops,
in which methods may return void to prevent it from being printed.
It may also be useful to represent void values as returned from calls
to external functions (C-void functions) or from remote procedure calls.
Smalltalk code does not normally use it.
[author:]
Claus Gittinger
"
! !
!VoidObject class methodsFor:'instance creation'!
basicNew
TheOneAndOnlyVoid isNil ifTrue:[
TheOneAndOnlyVoid := super basicNew.
].
^ TheOneAndOnlyVoid
"
VoidObject basicNew
VoidObject new
"
! !
!VoidObject class methodsFor:'class initialization'!
initialize
|singleton|
singleton := self basicNew.
Smalltalk
at:#Void put:singleton;
at:#void put:singleton. "/ for JavaScript code
"Modified: / 14-03-2018 / 19:32:23 / stefan"
! !
!VoidObject methodsFor:'printing & storing'!
printOn:aStream
aStream nextPutAll:'Void'.
! !
!VoidObject methodsFor:'queries'!
isVoid
^ true
"
Void isVoid
"
! !
!VoidObject class methodsFor:'documentation'!
version
^ '$Header$'
!
version_CVS
^ '$Header$'
! !
VoidObject initialize!