compiler/PPCChoiceNode.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Thu, 21 May 2015 14:12:22 +0100
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child 515 b5316ef15274
permissions -rw-r--r--
Updated to PetitCompiler-JanKurs.118, PetitCompiler-Tests-JanKurs.46, PetitCompiler-Extras-Tests-JanKurs.11, and PetitCompiler-Benchmarks-JanKurs.11 Name: PetitCompiler-JanKurs.118 Author: JanKurs Time: 13-05-2015, 03:59:01.292 PM UUID: 4a8ccd94-3131-4cc7-9098-528f8e5ea0b5 Name: PetitCompiler-Tests-JanKurs.46 Author: JanKurs Time: 04-05-2015, 04:25:06.162 PM UUID: 9f4cf8b7-876e-4a13-9579-b833f016db66 Name: PetitCompiler-Extras-Tests-JanKurs.11 Author: JanKurs Time: 13-05-2015, 04:27:27.940 PM UUID: e9f30c31-fbd0-4e96-ad2a-868f88d20ea8 Name: PetitCompiler-Benchmarks-JanKurs.11 Author: JanKurs Time: 13-05-2015, 02:21:49.932 PM UUID: 6a23fd1e-a86f-46db-8221-cc41b778d32c
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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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prefix
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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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