islands/PPNonEmptyParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Tue, 12 May 2015 01:24:03 +0100
changeset 459 4751c407bb40
parent 387 e2b2ccaa4de6
child 504 0fb1f0799fc1
permissions -rw-r--r--
Merged with PetitCompiler-JanKurs.20150510144201, PetitCompiler-Tests-JanKurs.20150510144201, PetitCompiler-Extras-Tests-JanKurs.20150510144201, PetitCompiler-Benchmarks-JanKurs.20150510144201 Name: PetitCompiler-JanKurs.20150510144201 Author: JanKurs Time: 10-05-2015, 04:42:29.192 PM UUID: 58a4786b-1182-4904-8b44-a13d3918f244 Name: PetitCompiler-Tests-JanKurs.20150510144201 Author: JanKurs Time: 10-05-2015, 04:32:12.870 PM UUID: 2a8fd41a-331b-4dcf-a7a3-752a50ce86e7 Name: PetitCompiler-Extras-Tests-JanKurs.20150510144201 Author: JanKurs Time: 10-05-2015, 04:59:25.308 PM UUID: ef43bd1a-be60-4e88-b749-8b635622c969 Name: PetitCompiler-Benchmarks-JanKurs.20150510144201 Author: JanKurs Time: 10-05-2015, 05:04:54.561 PM UUID: d8e764fd-016b-46e2-9fc1-17c38c18f0e5
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"{ Package: 'stx:goodies/petitparser/islands' }"
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"{ NameSpace: Smalltalk }"
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PPDelegateParser subclass:#PPNonEmptyParser
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	instanceVariableNames:''
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitIslands-Parsers'
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!
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PPNonEmptyParser comment:'I return failure, if the delegate parser did not consumed any input.'
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!
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!PPNonEmptyParser methodsFor:'parsing'!
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parseOn: aPPContext
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	| position result |
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	position := aPPContext position.
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	result := parser parseOn: aPPContext.
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	(((position == aPPContext position) and: [ aPPContext atEnd not ]) and: [ result isPetitFailure not ]) ifTrue: [ 
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		^ PPFailure message: 'Epsilon parse not allowed' context: aPPContext at: position
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	].
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	^ result
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! !
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