PPOptionalParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Wed, 17 Jun 2015 16:49:28 +0100
changeset 492 fc3dbe5654c5
parent 377 6112a403a52d
permissions -rw-r--r--
Use #deepCopy instead of #copy when copying RB parse tree ...because #copy make a copy if child nodes but does not set their parents properly. Therefore node replacing does not work because it replaces it in wrong tree (original, not the copy).
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"{ Package: 'stx:goodies/petitparser' }"
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PPDelegateParser subclass:#PPOptionalParser
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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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!PPOptionalParser methodsFor:'parsing'!
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parseOn: aPPContext
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	| element |
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	element := parser parseOn: aPPContext.
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	^ element isPetitFailure ifFalse: [ element ]
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! !
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!PPOptionalParser class methodsFor:'documentation'!
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version_SVN
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    ^ '$Id: PPOptionalParser.st,v 1.4 2014-03-04 14:33:10 cg Exp $'
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! !
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