PPRepeatingParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Sat, 05 May 2012 00:18:40 +0200
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"{ Package: 'stx:goodies/petitparser' }"
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PPDelegateParser subclass:#PPRepeatingParser
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	instanceVariableNames:'min max'
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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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!PPRepeatingParser class methodsFor:'instance creation'!
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on: aParser
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	^ (super on: aParser) setMin: 0 max: SmallInteger maxVal
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!
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on: aParser max: aMaxInteger
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	^ (self on: aParser) setMin: 0 max: aMaxInteger
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!
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on: aParser min: aMinInteger
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	^ (self on: aParser) setMin: aMinInteger max: SmallInteger maxVal 
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!
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on: aParser min: aMinInteger max: aMaxInteger
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	^ (self on: aParser) setMin: aMinInteger max: aMaxInteger
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! !
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!PPRepeatingParser methodsFor:'accessing'!
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max
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	"Answer the maximum number of repetitions."
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	^ max
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!
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min
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	"Answer the minimum number of repetitions."
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0
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	^ min
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! !
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!PPRepeatingParser methodsFor:'initialization'!
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setMin: aMinInteger max: aMaxInteger
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	min := aMinInteger.
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	max := aMaxInteger
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! !
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!PPRepeatingParser methodsFor:'parsing'!
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parseOn: aStream
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	| start element elements |
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	start := aStream position.
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	elements := OrderedCollection new.
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	[ elements size < min ] whileTrue: [
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		(element := parser parseOn: aStream) isPetitFailure ifTrue: [
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			aStream position: start.
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			^ element ].
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		elements addLast: element ].
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	[ elements size < max ] whileTrue: [
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	 	(element := parser parseOn: aStream) isPetitFailure
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			ifTrue: [ ^ elements asArray ].
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		elements addLast: element ].
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	^ elements asArray
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! !
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!PPRepeatingParser methodsFor:'printing'!
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printOn: aStream
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	super printOn: aStream.
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	aStream nextPutAll: ' ['; print: min; nextPutAll: ', '; nextPutAll: (max = SmallInteger maxVal
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		ifTrue: [ '*' ] ifFalse: [ max printString ]); nextPut: $]
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! !
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!PPRepeatingParser class methodsFor:'documentation'!
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version
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    ^ '$Header: /cvs/stx/stx/goodies/petitparser/PPRepeatingParser.st,v 1.3 2012-05-04 22:09:29 vrany Exp $'
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!
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version_CVS
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    ^ '$Header: /cvs/stx/stx/goodies/petitparser/PPRepeatingParser.st,v 1.3 2012-05-04 22:09:29 vrany Exp $'
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!
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0
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version_SVN
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    ^ '§Id: PPRepeatingParser.st 2 2010-12-17 18:44:23Z vranyj1 §'
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! !