compiler/PPCRewritingVisitor.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Tue, 12 May 2015 01:24:03 +0100
changeset 459 4751c407bb40
parent 452 9f4558b3be66
child 532 132d7898a2a1
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

"{ Package: 'stx:goodies/petitparser/compiler' }"

"{ NameSpace: Smalltalk }"

PPCNodeVisitor subclass:#PPCRewritingVisitor
	instanceVariableNames:'change'
	classVariableNames:''
	poolDictionaries:''
	category:'PetitCompiler-Visitors'
!

!PPCRewritingVisitor methodsFor:'as yet unclassified'!

change
    self flag: 'JK: Do we need this?'.
    change := true.
!

visitChild: child of: node
    | newChild |

    (self isOpen: child) ifTrue: [ 
        "already processing..."
        ^ nil
    ].

    (self isCached: child) ifTrue: [ 
        "Use Cached Value"
        node replace: child with: (self cachedValue: child).
        ^ nil
    ]. 


    change := false.
    newChild := self visit: child.
    change ifTrue: [ 
        node replace: child with: newChild.
    ].
!

visitChildren: node
    node children do: [ :child | 
        self visitChild: child of: node
    ]
! !