PPPredicateSequenceParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Wed, 27 May 2015 08:37:09 +0100
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Add inspector tab to present parser tree.
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"{ Package: 'stx:goodies/petitparser' }"
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PPPredicateParser subclass:#PPPredicateSequenceParser
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	instanceVariableNames:'size'
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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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!PPPredicateSequenceParser class methodsFor:'instance creation'!
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on: aBlock message: aString negated: aNegatedBlock message: aNegatedString size: anInteger 
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	^ self new initializeOn: aBlock message: aString negated: aNegatedBlock message: aNegatedString size: anInteger
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!
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on: aBlock message: aString size: anInteger
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	^ self on: aBlock message: aString negated: [ :each | (aBlock value: each) not ] message: 'no ' , aString size: anInteger 
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! !
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!PPPredicateSequenceParser methodsFor:'accessing'!
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size
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	"Answer the sequence size of the receiver."
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	^ size
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! !
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!PPPredicateSequenceParser methodsFor:'initialization'!
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initializeOn: aBlock message: aString negated: aNegatedBlock message: aNegatedString size: anInteger
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	predicate := aBlock.
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	predicateMessage := aString.
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	negated := aNegatedBlock.
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	negatedMessage := aNegatedString.
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	size := anInteger 
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! !
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!PPPredicateSequenceParser methodsFor:'operators'!
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negate
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	"Answer a parser that is the negation of the receiving predicate parser."
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	^ self class 
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		on: negated message: negatedMessage
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		negated: predicate message: predicateMessage
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		size: size
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! !
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!PPPredicateSequenceParser methodsFor:'parsing'!
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parseOn: aPPContext
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	| memento result |
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	memento := aPPContext remember.
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	result := aPPContext stream next: size.
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	(result size = size and: [ predicate value: result ])
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		ifTrue: [ ^ result ].
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	aPPContext restore: memento.
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	^ PPFailure message: predicateMessage context: aPPContext
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! !
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!PPPredicateSequenceParser class methodsFor:'documentation'!
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version
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    ^ '$Header: /cvs/stx/stx/goodies/petitparser/PPPredicateSequenceParser.st,v 1.4 2014-03-04 14:33:22 cg Exp $'
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!
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version_CVS
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    ^ '$Header: /cvs/stx/stx/goodies/petitparser/PPPredicateSequenceParser.st,v 1.4 2014-03-04 14:33:22 cg Exp $'
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!
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    ^ '$Id: PPPredicateSequenceParser.st,v 1.4 2014-03-04 14:33:22 cg Exp $'
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! !
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