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 }"
PPCNilNode subclass:#PPCSentinelNode
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Nodes'
!
PPCSentinelNode class instanceVariableNames:'Instance'
"
No other class instance variables are inherited by this class.
"
!
!PPCSentinelNode class methodsFor:'as yet unclassified'!
instance
^ Instance ifNil: [ Instance := self basicNew ]
! !