compiler/PPCRewritingVisitor.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Fri, 01 May 2015 14:39:47 +0200
changeset 445 eb33780df2f9
parent 438 20598d7ce9fa
child 452 9f4558b3be66
permissions -rw-r--r--
Portability: Inlined #asLegalSelector since Smalltalk/X does not support it
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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"{ Package: 'stx:goodies/petitparser/compiler' }"
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"{ NameSpace: Smalltalk }"
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PPCNodeVisitor subclass:#PPCRewritingVisitor
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	instanceVariableNames:'change'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitCompiler-Visitors'
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!
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!PPCRewritingVisitor methodsFor:'as yet unclassified'!
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change
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	self flag: 'JK: Do we need this?'.
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	change := true.
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!
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visitChild: child of: node
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	| newChild |
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	(self isOpen: child) ifTrue: [ 
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		"already processing..."
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		^ nil
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	].
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	(self isCached: child) ifTrue: [ 
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		"Use Cached Value"
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		node replace: child with: (self cachedValue: child).
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		^ nil
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	]. 
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	change := false.
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	newChild := self visit: child.
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	change ifTrue: [ 
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		node replace: child with: newChild.
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	].
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!
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visitChildren: node
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	node children do: [ :child | 
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		self visitChild: child of: node
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	]
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! !
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