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"
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COPYRIGHT (c) 1989-93 by Claus Gittinger
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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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ParseNode subclass:#StatementNode
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instanceVariableNames:'expression nextStatement'
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classVariableNames:''
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poolDictionaries:''
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category:'System-Compiler-Support'
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!
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StatementNode comment:'
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COPYRIGHT (c) 1989-93 by Claus Gittinger
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All Rights Reserved
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3
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$Header: /cvs/stx/stx/libcomp/StatementNode.st,v 1.2 1993-10-13 00:26:18 claus Exp $
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'!
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!StatementNode class methodsFor:'instance creation'!
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expression:e
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^ (self basicNew) expression:e
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! !
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!StatementNode methodsFor:'evaluating'!
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evaluateExpression
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^ expression evaluate
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!
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evaluate
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|lastValue thisStatement|
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"this could be done more elegant - but with lots of recursion"
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thisStatement := self.
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[thisStatement notNil] whileTrue:[
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lastValue := thisStatement evaluateExpression.
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thisStatement := thisStatement nextStatement
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].
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^ lastValue
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! !
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!StatementNode methodsFor:'code generation'!
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codeOn:aStream inBlock:b
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"generate code for this statement"
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expression codeOn:aStream inBlock:b
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!
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codeForSideEffectOn:aStream inBlock:b
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"generate code for this statement - value not needed"
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expression codeForSideEffectOn:aStream inBlock:b
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! !
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!StatementNode methodsFor:'accessing'!
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last
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"return the last statement in a list"
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|last this|
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"this could be done more elegant - but with lots of recursion"
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last := self.
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this := self.
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[this notNil] whileTrue:[
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last := this.
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this := this nextStatement
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].
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^ last
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!
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nextStatement:s
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nextStatement := s
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!
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nextStatement
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^ nextStatement
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!
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expression:e
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expression := e
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!
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expression
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^ expression
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! !
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!StatementNode methodsFor:'printing'!
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printOn:aStream indent:i
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expression printOn:aStream indent:i.
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!
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printAllOn:aStream
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self printAllOn:aStream indent:4
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!
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printAllOn:aStream indent:i
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|thisStatement|
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thisStatement := self.
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[thisStatement notNil] whileTrue:[
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i timesRepeat:[aStream space].
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thisStatement printOn:aStream indent:i.
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thisStatement nextStatement notNil ifTrue:[
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aStream nextPut:$..
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aStream cr.
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].
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thisStatement := thisStatement nextStatement
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]
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! !
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