Portability: fixes for Smalltalk/X
* Do not use detect:ifFound: - not present in Smalltalk/X
* Removed leftover debugging code (Halt if:, ...)
* Do not use `aClass methods`, use `aClass methodDictionary values`
* Do not use #allPairsDo; - not present in Smalltalk/X
* Do not use #crShow: - not present in Smalltalk/X
* On Smalltalk?X use Filename - there's no FileReference in Smalltalk/X
* Do not use CharacterSet, use String
"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
PPCDelegateNode subclass:#PPCOptionalNode
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Nodes'
!
!PPCOptionalNode methodsFor:'accessing'!
prefix
^ #opt
! !
!PPCOptionalNode methodsFor:'analysis'!
acceptsEpsilon
^ true
!
acceptsEpsilonOpenSet: set
^ true
!
isNullable
^ true
! !
!PPCOptionalNode methodsFor:'visiting'!
accept: visitor
^ visitor visitOptionalNode: self
! !