islands/PPInputEnds.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Tue, 16 Jun 2015 06:45:26 +0100
changeset 489 0ca7a70db0f5
parent 454 a9cd5ea7cc36
permissions -rw-r--r--
Fix in codegen for inlined sequence nodes. For inlined sequence nodes, generate nested ifs rather than sequential code which does not work when inlined. The reason is that #codeReturn: in inline generates instvar assignment, not method return, so in sequential code the next child of a sequence will be probed even if previous failed. If that happends, the whole sequence fail and therefore we must generate nested ifs to correctly handle this w.r.t. inlining.
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"{ Package: 'stx:goodies/petitparser/islands' }"
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a9cd5ea7cc36 Portability: fixes for Smalltalk/X
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"{ NameSpace: Smalltalk }"
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PPParser subclass:#PPInputEnds
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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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!PPInputEnds methodsFor:'as yet unclassified'!
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acceptsEpsilon
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	^ true
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!
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exampleOn: aStream 
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	aStream nextPutAll: '#End Of Input#'
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!
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isNullable 
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	^ true
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!
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parseOn: aPPContext
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	(aPPContext atEnd) ifFalse:
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	[
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		^ PPFailure message: 'end of input expected' context: aPPContext.
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	].
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	^ #inputEnds
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! !
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