compiler/PPCChoiceNode.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Mon, 17 Aug 2015 12:13:16 +0100
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permissions -rw-r--r--
Updated to PetitCompiler-JanKurs.160, PetitCompiler-Tests-JanKurs.112, PetitCompiler-Extras-Tests-JanKurs.25, PetitCompiler-Benchmarks-JanKurs.17 Name: PetitCompiler-JanKurs.160 Author: JanKurs Time: 17-08-2015, 09:52:26.291 AM UUID: 3b4bfc98-8098-4951-af83-a59e2585b121 Name: PetitCompiler-Tests-JanKurs.112 Author: JanKurs Time: 16-08-2015, 05:00:32.936 PM UUID: 85613d47-08f3-406f-9823-9cdab451e805 Name: PetitCompiler-Extras-Tests-JanKurs.25 Author: JanKurs Time: 16-08-2015, 05:00:10.328 PM UUID: 09731810-51a1-4151-8d3a-56b636fbd1f7 Name: PetitCompiler-Benchmarks-JanKurs.17 Author: JanKurs Time: 05-08-2015, 05:29:32.407 PM UUID: e544b5f1-bcf8-470b-93a6-d2363e4dfc8a
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"{ Package: 'stx:goodies/petitparser/compiler' }"
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"{ NameSpace: Smalltalk }"
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PPCListNode subclass:#PPCChoiceNode
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	instanceVariableNames:''
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitCompiler-Nodes'
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!
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!PPCChoiceNode methodsFor:'accessing'!
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defaultName
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    ^ #ch
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! !
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!PPCChoiceNode methodsFor:'analysis'!
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acceptsEpsilon
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    ^ self acceptsEpsilonOpenSet: IdentitySet new.
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!
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acceptsEpsilonOpenSet: set
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    set add: self.
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    ^ self children anySatisfy: [:e | e acceptsEpsilonOpenSet: set ].
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!
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check
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    ^ self children asIdentitySet size = children size ifFalse: [ 
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        Transcript cr; show: 'WARNING: Identical children in choice!!'; cr.
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        nil.
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    ] ifTrue: [ nil ]
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!
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recognizedSentencesPrim
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    | retval |
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    (self children anySatisfy: [ :child | child hasFiniteLanguage not ]) ifTrue: [ ^ #() ].
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    retval := Set new.
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    self children do: [ : child |
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        retval addAll: child recognizedSentences.
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    ].
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    ^ retval asArray
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! !
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!PPCChoiceNode methodsFor:'visiting'!
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accept: visitor
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    ^ visitor visitChoiceNode: self
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! !
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!PPCChoiceNode class methodsFor:'documentation'!
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version_HG
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    ^ '$Changeset: <not expanded> $'
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! !
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