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"
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COPYRIGHT (c) 1993 by Claus Gittinger
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84
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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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Object subclass:#UndefinedVariable
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140
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instanceVariableNames:'name'
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classVariableNames:''
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poolDictionaries:''
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category:'System-Compiler-Support'
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0
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!
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!UndefinedVariable class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1993 by Claus Gittinger
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84
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All Rights Reserved
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0
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20
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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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0
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20
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documentation
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"
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node for parse-trees, representing undefined variables
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This class exists solely for the error message when accessing undefined
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variables - instead of returning nil, the compiler returns an instance
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of this class, which will not understand ANY message.
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The error message will then be 'UndefinedVariable ...'
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instead of 'UndefineObject ...', which is somewhat more informative.
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"
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140
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!
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version
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^ '$Header: /cvs/stx/stx/libcomp/Attic/UndefVar.st,v 1.9 1995-11-23 02:15:29 cg Exp $'
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! !
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0
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!UndefinedVariable class methodsFor:'instance creation'!
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name:aString
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^ (self basicNew) setName:aString
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! !
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!UndefinedVariable methodsFor:'catching messages'!
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class
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^ self
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!
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methods
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self methodError
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!
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methodsFor:arg
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self methodError
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!
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subclass:t instanceVariableNames:f classVariableNames:d poolDictionaries:s
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self subclassingError
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!
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subclass:t instanceVariableNames:f classVariableNames:d poolDictionaries:s category:cat
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self subclassingError
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!
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variableByteSubclass:t instanceVariableNames:f
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84
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classVariableNames:d poolDictionaries:s category:cat
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0
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self subclassingError
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!
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variableSubclass:t instanceVariableNames:f
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84
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classVariableNames:d poolDictionaries:s category:cat
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0
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self subclassingError
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!
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variableWordSubclass:t instanceVariableNames:f
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84
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classVariableNames:d poolDictionaries:s category:cat
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0
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self subclassingError
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! !
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!UndefinedVariable methodsFor:'error reporting'!
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methodError
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self error:('trying to define methods for undefined class: ', name)
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!
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subclassingError
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self error:('trying to create subclass of undefined class: ', name)
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! !
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!UndefinedVariable methodsFor:'file skipping'!
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0
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140
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fileInFrom:aStream notifying:someOne passChunk:passChunk
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"this is sent, if you continue after a warning about
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methods for undefined class.
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It simply skips chunks and sends a warning to the Transcript."
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|aString done|
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done := false.
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[done] whileFalse:[
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done := aStream atEnd.
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done ifFalse:[
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aString := aStream nextChunk.
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done := aString isNil or:[aString isEmpty].
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done ifFalse:[
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Transcript showCr:'*** skipping method for undefined class: ' , name
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]
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]
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].
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0
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! !
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!UndefinedVariable methodsFor:'printing & storing'!
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printString
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"return a string for printing myself"
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^ 'UndefinedVariable(' , name , ')'
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! !
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140
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!UndefinedVariable methodsFor:'private accessing'!
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setName:aString
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name := aString
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! !
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