compiler/PPCTokenVisitor.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Tue, 12 May 2015 01:24:03 +0100
changeset 459 4751c407bb40
parent 452 9f4558b3be66
child 515 b5316ef15274
permissions -rw-r--r--
Merged with PetitCompiler-JanKurs.20150510144201, PetitCompiler-Tests-JanKurs.20150510144201, PetitCompiler-Extras-Tests-JanKurs.20150510144201, PetitCompiler-Benchmarks-JanKurs.20150510144201 Name: PetitCompiler-JanKurs.20150510144201 Author: JanKurs Time: 10-05-2015, 04:42:29.192 PM UUID: 58a4786b-1182-4904-8b44-a13d3918f244 Name: PetitCompiler-Tests-JanKurs.20150510144201 Author: JanKurs Time: 10-05-2015, 04:32:12.870 PM UUID: 2a8fd41a-331b-4dcf-a7a3-752a50ce86e7 Name: PetitCompiler-Extras-Tests-JanKurs.20150510144201 Author: JanKurs Time: 10-05-2015, 04:59:25.308 PM UUID: ef43bd1a-be60-4e88-b749-8b635622c969 Name: PetitCompiler-Benchmarks-JanKurs.20150510144201 Author: JanKurs Time: 10-05-2015, 05:04:54.561 PM UUID: d8e764fd-016b-46e2-9fc1-17c38c18f0e5
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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PPCRewritingVisitor subclass:#PPCTokenVisitor
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	instanceVariableNames:'forbiddenNodes'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitCompiler-Visitors'
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!
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!PPCTokenVisitor methodsFor:'as yet unclassified'!
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visitActionNode: node	
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    (node hasProperty: #trimmingToken) ifTrue: [ 
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        | child newChild | 
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        "trimming token in token, remove it"
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        self change.
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        child := node child secondChild.
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        newChild := self visit: child.
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        child name isNil ifTrue: [ 
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            newChild name: node name.
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            ^ newChild.
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        ].
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        ^ PPCForwardNode new
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            child: newChild;
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            name: node name;
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            yourself
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    ].
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    ^ super visitActionNode: node
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!
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visitTokenNode: node
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    "token in token, remove the token"
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    self visitChildren: node.
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    node child name isNil ifTrue: [ 
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        self change.
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        node child name: node name.
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        ^ node child
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    ].
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 		self change.
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    ^ PPCForwardNode new
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        child: node child;
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        name: node name;
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        yourself	
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! !
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!PPCTokenVisitor methodsFor:'traversing'!
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afterAccept: node retval: retval
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    (retval name isNil not and: [ (retval name endsWith: '_ws') ]) ifTrue: [ 
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        self change.
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        ^ PPCTokenWhitespaceNode new
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            child: retval;
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            yourself
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    ].
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    ^ super afterAccept: node retval: retval
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!
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beforeAccept: node
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    self assert: (forbiddenNodes includes: node) not description: 'Does not look like a token' 
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!
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forbiddenNodes: nodeSet
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    forbiddenNodes := nodeSet.
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! !
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