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"
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COPYRIGHT (c) 2003 by eXept Software AG
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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"{ Package: 'stx:libbasic2' }"
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Stream subclass:#ConsStream
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instanceVariableNames:'list'
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classVariableNames:''
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poolDictionaries:''
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category:'Collections-Linked'
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!
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!ConsStream class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 2003 by eXept Software AG
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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documentation
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"
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A stream on a list (of conses)
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Conses are not heavily used by Smalltalk (actually: not at all).
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Consider this a demo class.
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[author:]
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2661
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Claus Gittinger (Dec 2003)
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[see also:]
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"
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!
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examples
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"
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[exBegin]
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|list s|
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list := Cons fromArray:#(1 2 3 4).
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s := list readStream.
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[s atEnd] whileFalse:[
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Transcript showCR:(s next).
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].
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[exEnd]
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[exBegin]
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|gen allNumbers s|
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gen := [:n | LazyCons car:n cdr:[ gen value:n+1 ]].
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allNumbers := gen value:1.
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s := allNumbers readStream.
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100 timesRepeat:[
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Transcript showCR:(s next).
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].
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[exEnd]
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"
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! !
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!ConsStream class methodsFor:'instance creation'!
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on:aCons
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^ self basicNew list:aCons
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! !
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!ConsStream methodsFor:'accessing'!
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list:something
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list := something.
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! !
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!ConsStream methodsFor:'reading'!
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atEnd
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^ list isNil
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!
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next
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|rslt|
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list isNil ifTrue:[
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^ self pastEndRead
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].
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rslt := list car.
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list := list cdr.
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^ rslt
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! !
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!ConsStream class methodsFor:'documentation'!
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version
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^ '$Header: /cvs/stx/stx/libbasic2/ConsStream.st,v 1.4 2011-09-27 09:42:44 cg Exp $'
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!
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version_CVS
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^ '$Header: /cvs/stx/stx/libbasic2/ConsStream.st,v 1.4 2011-09-27 09:42:44 cg Exp $'
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! !
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