PPStartOfWordParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Fri, 24 Jul 2015 15:06:54 +0100
changeset 502 1e45d3c96ec5
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permissions -rw-r--r--
Updated to PetitCompiler-JanVrany.135, PetitCompiler-Tests-JanKurs.93, PetitCompiler-Extras-Tests-JanVrany.16, PetitCompiler-Benchmarks-JanKurs.12 Name: PetitCompiler-JanVrany.135 Author: JanVrany Time: 22-07-2015, 06:53:29.127 PM UUID: 890178b5-275d-46af-a2ad-1738998f07cb Ancestors: PetitCompiler-JanVrany.134 Name: PetitCompiler-Tests-JanKurs.93 Author: JanKurs Time: 20-07-2015, 11:30:10.283 PM UUID: 6473e671-ad70-42ca-b6c3-654b78edc531 Ancestors: PetitCompiler-Tests-JanKurs.92 Name: PetitCompiler-Extras-Tests-JanVrany.16 Author: JanVrany Time: 22-07-2015, 05:18:22.387 PM UUID: 8f6f9129-dbba-49b1-9402-038470742f98 Ancestors: PetitCompiler-Extras-Tests-JanKurs.15 Name: PetitCompiler-Benchmarks-JanKurs.12 Author: JanKurs Time: 06-07-2015, 02:10:06.901 PM UUID: cb24f1ac-46a4-494d-9780-64576f0f0dba Ancestors: PetitCompiler-Benchmarks-JanKurs.11, PetitCompiler-Benchmarks-JanVrany.e29bd90f388e.20150619081300
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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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