compiler/PPTokenizingCompiledParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Wed, 20 May 2015 16:47:52 +0100
changeset 463 d4014e0a47a0
parent 459 4751c407bb40
child 464 f6d77fee9811
permissions -rw-r--r--
Small improvement in inlining: inline child of an action node.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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"{ Package: 'stx:goodies/petitparser/compiler' }"
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"{ NameSpace: Smalltalk }"
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PPCompiledParser subclass:#PPTokenizingCompiledParser
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	instanceVariableNames:'currentTokenValue currentTokenType'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitCompiler-Parsers'
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!
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9f4558b3be66 Updated to PetitCompiler-JanKurs.111, PetitCompiler-Tests-JanKurs.51, PetitCompiler-Benchmarks-JanKurs.7, added PetitCompiler-Extras-Tests-JanKurs.4
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!PPTokenizingCompiledParser methodsFor:'tokenizing'!
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consume: tokenType
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    (self currentTokenTypeIs: tokenType) ifTrue: [ 
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        | retval |
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        retval := currentTokenValue.
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        currentTokenType := nil.
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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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        self error.
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    ]
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!
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consumeWhitespace
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    self shouldBeImplemented 
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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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9f4558b3be66 Updated to PetitCompiler-JanKurs.111, PetitCompiler-Tests-JanKurs.51, PetitCompiler-Benchmarks-JanKurs.7, added PetitCompiler-Extras-Tests-JanKurs.4
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currentTokenTypeIs: tokenType
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    "if the type is read"
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    currentTokenType isNil ifFalse: [ ^ currentTokenType = tokenType ].
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    "if not, try to read the token"
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    self perform: tokenType.
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    error ifTrue: [  
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        ^ error := false.
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    ].
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    ^ true
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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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parseOn: aPPContext
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    | retval |
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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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    currentTokenType := nil.
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    self consumeWhitespace.
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    retval := self perform: startSymbol.
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    self consumeWhitespace.
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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
452
9f4558b3be66 Updated to PetitCompiler-JanKurs.111, PetitCompiler-Tests-JanKurs.51, PetitCompiler-Benchmarks-JanKurs.7, added PetitCompiler-Extras-Tests-JanKurs.4
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
diff changeset
    75
! !
9f4558b3be66 Updated to PetitCompiler-JanKurs.111, PetitCompiler-Tests-JanKurs.51, PetitCompiler-Benchmarks-JanKurs.7, added PetitCompiler-Extras-Tests-JanKurs.4
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
diff changeset
    76