PPStartOfWordParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Mon, 17 Aug 2015 12:13:16 +0100
changeset 515 b5316ef15274
parent 427 a7f5e6de19d2
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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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"{ Package: 'stx:goodies/petitparser' }"
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"{ NameSpace: Smalltalk }"
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PPParser subclass:#PPStartOfWordParser
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	instanceVariableNames:''
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitParser-Parsers'
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!
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!PPStartOfWordParser methodsFor:'as yet unclassified'!
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acceptsEpsilon
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	^ true
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!
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parseOn: aPPContext
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	aPPContext atEnd ifTrue: [  
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		^ PPFailure message: 'Start of word expected' context: aPPContext at: aPPContext position 
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	].
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	(aPPContext position == 0) ifTrue: [ 
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		(aPPContext peek isAlphaNumeric) ifTrue: [ 
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			^ #startOfWord
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		] ifFalse: [ 
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			^ PPFailure message: 'Start of word expected' context: aPPContext at: aPPContext position 
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	 	]
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	].
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	aPPContext back.
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	aPPContext peek isAlphaNumeric ifTrue: [
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		^ PPFailure message: 'Start of word expected' context: aPPContext at: aPPContext position 
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	].
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	aPPContext next.
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	^ aPPContext peek isAlphaNumeric ifTrue: [ #startOfWord ] ifFalse: [ 
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		PPFailure message: 'Start of word expected' context: aPPContext at: aPPContext position 
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	]
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! !
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