islands/PPWater.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Sun, 10 May 2015 14:20:24 +0100
changeset 454 a9cd5ea7cc36
parent 389 009c2e13973c
child 460 87a3d30ab570
permissions -rw-r--r--
Portability: fixes for Smalltalk/X * Do not use detect:ifFound: - not present in Smalltalk/X * Removed leftover debugging code (Halt if:, ...) * Do not use `aClass methods`, use `aClass methodDictionary values` * Do not use #allPairsDo; - not present in Smalltalk/X * Do not use #crShow: - not present in Smalltalk/X * On Smalltalk?X use Filename - there's no FileReference in Smalltalk/X * Do not use CharacterSet, use String
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"{ Package: 'stx:goodies/petitparser/islands' }"
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"{ NameSpace: Smalltalk }"
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PPDelegateParser subclass:#PPWater
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	instanceVariableNames:'waterToken context'
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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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!PPWater class methodsFor:'as yet unclassified'!
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on: parser
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	^ self on: parser waterToken: #any asParser
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!
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on: parser waterToken: waterToken
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	^ (super on: parser)
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		waterToken: waterToken;
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		yourself
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! !
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!PPWater methodsFor:'as yet unclassified'!
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checkContext: aPPContext
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	context == aPPContext ifFalse: [ 
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		self reset: aPPContext
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	]
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!
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children
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	^ Array with: waterToken
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!
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initialize
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	super initialize.
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	waterToken := nil asParser.
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	context := nil.
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!
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parseOn: aPPContext
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	| waterPosition result |
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	(aPPContext waterPosition == aPPContext position) ifFalse: [ 
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		waterPosition := aPPContext waterPosition.
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		aPPContext waterPosition: aPPContext position.
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		"TODO: probably can be rewritten with test in the end!!"
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		result := parser parseOn: aPPContext.
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		[result isPetitFailure] whileFalse: [ 
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			waterToken parseOn: aPPContext.
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			aPPContext waterPosition: aPPContext position.
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			result := parser parseOn: aPPContext.
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		].
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		aPPContext waterPosition: waterPosition.
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	].
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	^ #water
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!
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replace: child with: anotherChild
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	child == waterToken  ifTrue: [ 
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		waterToken := anotherChild.
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	]
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!
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reset: aPPContext
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	| waterObjects |
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	context := aPPContext.
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	waterObjects := aPPContext globalAt: #waterObjects ifAbsent: [ OrderedCollection new ].
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	waterObjects add: #any asParser.
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	waterToken := PPChoiceParser withAll: waterObjects.
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!
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waterToken: aPPParser
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	^ waterToken := aPPParser
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! !
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