Oops, forgot to export PETITCOMPILER_DATA_DIRECTORY variable
...so Smalltalk code could not read it. Also fixed test for "include" scripts
so they are not downloaded again when already downloaded.
"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
PPCDelegateNode subclass:#PPCOptionalNode
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Nodes'
!
!PPCOptionalNode methodsFor:'accessing'!
defaultName
^ #opt
! !
!PPCOptionalNode methodsFor:'analysis'!
acceptsEpsilon
^ true
!
acceptsEpsilonOpenSet: set
^ true
!
isNullable
^ true
! !
!PPCOptionalNode methodsFor:'visiting'!
accept: visitor
^ visitor visitOptionalNode: self
! !