compiler/PPCompiledParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Thu, 30 Apr 2015 23:43:14 +0200
changeset 438 20598d7ce9fa
parent 431 dd353f15b0ef
child 452 9f4558b3be66
permissions -rw-r--r--
Updated to PetitCompiler-JanKurs.100, PetitCompiler-Tests-JanKurs.44 and PetitCompiler-Benchmarks-JanKurs.4 Name: PetitCompiler-JanKurs.100 Author: JanKurs Time: 30-04-2015, 10:48:52.165 AM UUID: 80196870-5921-46d9-ac20-a43bf5c2f3c2 Name: PetitCompiler-Tests-JanKurs.44 Author: JanKurs Time: 30-04-2015, 10:49:22.489 AM UUID: 348c02e8-18ce-48f6-885d-fcff4516a298 Name: PetitCompiler-Benchmarks-JanKurs.4 Author: JanKurs Time: 30-04-2015, 10:58:44.890 AM UUID: 18cadb42-f9ef-45fb-82e9-8469ade56c8b
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"{ Package: 'stx:goodies/petitparser/compiler' }"
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"{ NameSpace: Smalltalk }"
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PPParser subclass:#PPCompiledParser
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	instanceVariableNames:'startSymbol context failure error currentTokenValue
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		currentTokenType'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitCompiler-Core'
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!
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PPCompiledParser class instanceVariableNames:'parsers constants referringParser startSymbol'
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"
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 No other class instance variables are inherited by this class.
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"
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!
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!PPCompiledParser class methodsFor:'as yet unclassified'!
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addConstant: value as: id
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	self constants at: id ifPresent: [ 
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		((self constants at: id) = value) ifFalse: [self error: 'ooups']].	
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	self constants at: id put: value.
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!
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constants
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	constants ifNil: [ constants := IdentityDictionary new ].
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	^ constants
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!
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parse: input
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	^ self new parse: input
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!
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referringParser
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	^ referringParser ifNil: [ ^ PPSentinel new ]
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!
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referringParser: aPPParser
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	referringParser := aPPParser
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!
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startSymbol
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	^ startSymbol ifNil: [ ^ #start ]
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!
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startSymbol: symbol
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	startSymbol := symbol
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! !
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!PPCompiledParser methodsFor:'as yet unclassified'!
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callParser: id
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	| retval |
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	retval := (self class parsers at: id) parseOn: context.
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	retval isPetitFailure 	ifTrue: [ self error: retval message at: retval position ]
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									ifFalse: [ self clearError ].
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	^ retval
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!
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clearError
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	error := false.
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!
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error
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	^ self error: '' at: context position
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!
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error: message
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	^ self error: message at: context position
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!
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error: aMessage at: position
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	failure position < position ifTrue: [
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		failure message: aMessage.
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		failure position: position
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	].
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	error := true.
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	^ failure
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!
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initialize
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	super initialize.
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	self class constants keysAndValuesDo: [ :key :value |
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		self instVarNamed: key put: value.
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	].
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	startSymbol := self class startSymbol.
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!
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isCompiled
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	^ true
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!
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isError
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	^ error
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!
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parse: input rule: symbol
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	startSymbol := symbol.
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	^ self parse: input.
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!
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start
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	^ self subclassResponsibility
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!
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startSymbol: aSymbol
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	startSymbol := aSymbol
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! !
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!PPCompiledParser methodsFor:'parsing'!
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parseOn: aPPContext
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	| retval |
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"	context := aPPContext asCompiledParserContext."
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	context := aPPContext.
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	context compiledParser: self.
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	failure := PPFailure new message: nil; context: context; position: -1.
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	context noteFailure: failure.
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	error := false.
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	retval := self perform: startSymbol.
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	(retval isPetitFailure) ifTrue: [ aPPContext noteFailure: failure ].
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	error ifTrue: [ aPPContext noteFailure: failure. retval := failure ].
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"	aPPContext position: context position."
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	^ retval
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! !
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!PPCompiledParser methodsFor:'tokenizing'!
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consume: tokenType
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	(currentTokenType = tokenType) ifTrue: [ 
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		| retval |
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		retval := currentTokenValue.
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		self nextToken.
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		^ retval
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	] ifFalse: [ 
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		self error: 'expected: ', tokenType storeString, ' got ', currentTokenType storeString.
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	]
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!
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currentTokenType
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	currentTokenType isNil ifTrue: [ self nextToken ].
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	^ currentTokenType
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!
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currentTokenValue
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	currentTokenType isNil ifTrue: [ self nextToken ].
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	^ currentTokenType
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!
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nextToken
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	self shouldBeImplemented
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! !
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