compiler/PPCTokenGuard.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Wed, 17 Jun 2015 16:49:28 +0100
changeset 492 fc3dbe5654c5
parent 464 f6d77fee9811
permissions -rw-r--r--
Use #deepCopy instead of #copy when copying RB parse tree ...because #copy make a copy if child nodes but does not set their parents properly. Therefore node replacing does not work because it replaces it in wrong tree (original, not the copy).
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"{ Package: 'stx:goodies/petitparser/compiler' }"
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"{ NameSpace: Smalltalk }"
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Object subclass:#PPCTokenGuard
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	instanceVariableNames:'node'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitCompiler-Guards'
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!
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!PPCTokenGuard class methodsFor:'as yet unclassified'!
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on: node
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    ^ self new
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        node: node;
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        yourself
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! !
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f6d77fee9811 Updated to PetitCompiler-JanKurs.118, PetitCompiler-Tests-JanKurs.46, PetitCompiler-Extras-Tests-JanKurs.11, and PetitCompiler-Benchmarks-JanKurs.11
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!PPCTokenGuard methodsFor:'as yet unclassified'!
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firstToken
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    self assert: node firstSetWithTokens  size = 1.
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    ^ node firstSetWithTokens anyOne
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!
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makesSense
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    ^ node firstSetWithTokens size = 1 and: [ node firstSetWithTokens anyOne isTokenNode ]
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!
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node
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    ^ node
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!
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node: aPPCNode
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    node := aPPCNode
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! !
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