Portability fixes
* do not use Object>>asString. Not all Smalltalks implement it.
* do not use Object>>name. Not all Smalltalks implement it.
* do not use Dictionary keysAndValuesRemove:. Not all Smalltalks implement it.
* do not use Class>>methods The semantics is different among Smalltalks.
Use `Class methodDictionary values` instead.
* do not modify dictionary in #at:ifAbsentPut: block!
"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
PPCSequenceNode subclass:#PPCTrimNode
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Nodes'
!
!PPCTrimNode methodsFor:'accessing'!
child
^ children at: 2
!
child: anObject
children at: 2 put: anObject
!
defaultName
^ #trim
!
trimmer
^ children at: 1
!
trimmer: anObject
children at: 1 put: anObject
! !
!PPCTrimNode methodsFor:'analysis'!
acceptsEpsilon
^ self child acceptsEpsilonOpenSet: (IdentitySet with: self).
!
acceptsEpsilonOpenSet: set
(set includes: self child) ifFalse: [
set add: self child.
^ self child acceptsEpsilonOpenSet: set
].
^ false
! !
!PPCTrimNode methodsFor:'initialization'!
defaultTrimmer
| message |
message := PPCMessagePredicateNode new
message: #isSeparator;
predicate: [ :char | char isSeparator ]
yourself.
^ PPCStarNode new
child: message;
yourself.
!
initialize
super initialize.
children := Array new: 2.
children at: 1 put: self defaultTrimmer.
! !
!PPCTrimNode methodsFor:'visiting'!
accept: visitor
^ visitor visitTrimNode: self
! !