Use #deepCopy instead of #copy when copying RB parse tree
...because #copy make a copy if child nodes but does not set their parents properly.
Therefore node replacing does not work because it replaces it in wrong tree (original,
not the copy).
"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
PPCRewritingVisitor subclass:#PPCRecognizerComponentDetector
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Visitors'
!
!PPCRecognizerComponentDetector methodsFor:'visiting'!
visitNotNode: node
"We don't need result of the not,..."
| child newChild |
self change.
child := node child.
newChild := self visitWithRecognizingComponentVisitor: child.
node replace: child with: newChild.
^ node
!
visitTokenNode: node
| child newChild |
self change.
child := node child.
newChild := self visitWithRecognizingComponentVisitor: child.
node replace: child with: newChild.
^ node
!
visitTrimmingTokenNode: node
| child newChild whitespace newWhitespace |
self change.
child := node child.
newChild := self visitWithRecognizingComponentVisitor: child.
node replace: child with: newChild.
whitespace := node whitespace.
newWhitespace := self visitWithRecognizingComponentVisitor: whitespace.
node replace: whitespace with: newWhitespace.
^ node
!
visitWithRecognizingComponentVisitor: node
| retval forbiddenNodes copyVisitor tokenVisitor |
copyVisitor := PPCCopyVisitor new.
tokenVisitor := PPCRecognizerComponentVisitor new.
forbiddenNodes := openSet copy.
tokenVisitor forbiddenNodes: forbiddenNodes.
retval := copyVisitor visit: node.
retval := tokenVisitor visit: retval.
^ retval
! !