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"{ Package: 'stx:goodies/petitparser' }"
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0
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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 comment:'A parser that eagerly parses min to max instances of my delegate. The default instance parses eagerly an infinite number of elements, as min is set to 0 and max to infinity (SmallInteger maxVal).
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Instance Variables:
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4
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min <Integer> The minimum number of repetitions.
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max <Integer> The maximum number of repetitions.'
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0
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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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4
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^ (self on: aParser) setMin: aMinInteger max: SmallInteger maxVal
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0
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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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4
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(element := parser parseOn: aStream) isPetitFailure
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0
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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: $]
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! !
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!PPRepeatingParser class methodsFor:'documentation'!
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version_SVN
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4
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^ '$Id: PPRepeatingParser.st,v 1.2 2012-01-13 11:22:50 cg Exp $'
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! !
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