"{ Package: 'stx:goodies/petitparser/compiler' }"

"{ NameSpace: Smalltalk }"

PPCListNode subclass:#PPCTrimmingTokenNode

	instanceVariableNames:'tokenClass'

	classVariableNames:''

	poolDictionaries:''

	category:'PetitCompiler-Nodes'

!

!PPCTrimmingTokenNode methodsFor:'accessing'!

child

    ^ children at: 2

!

child: anObject

    children at: 2 put: anObject

!

prefix

    ^ #token

!

tokenClass

    ^ tokenClass

!

tokenClass: anObject

    tokenClass := anObject

!

whitespace

    ^ children at: 1

!

whitespace: anObject

    (anObject name isNil and: [ self child name isNotNil ]) ifTrue: [ 

        anObject name: self child name, '_ws'.

    ].

    children at: 1 put: anObject

! !

!PPCTrimmingTokenNode methodsFor:'analyzing'!

acceptsEpsilon

    ^ self child acceptsEpsilonOpenSet: (IdentitySet with: self).

!

acceptsEpsilonOpenSet: set

    (set includes: self child) ifFalse: [ 

        set add: self child.

        ^ self child acceptsEpsilonOpenSet: set 

    ].

    ^ false

!

firstSetSuchThat: block into: aCollection openSet: aSet

    (aSet includes: self) ifTrue: [ ^ aCollection ].

    aSet add: self.

    (block value: self) ifTrue: [ aCollection add: self. ^ aCollection ].

    ^ self child firstSetSuchThat: block into: aCollection openSet: aSet.

!

firstSets: aFirstDictionary into: aSet suchThat: aBlock

    "PRIVATE: Try to add additional elements to the first-set aSet of the receiver, use the incomplete aFirstDictionary."

    (aBlock value: self) ifFalse: [ 

        aSet addAll: (aFirstDictionary at: self child)

    ]

!

recognizedSentencesPrim

    ^ self child recognizedSentencesPrim 

! !

!PPCTrimmingTokenNode methodsFor:'comparing'!

= anotherNode

    super = anotherNode ifFalse: [ ^ false ].

    ^ tokenClass = anotherNode tokenClass.

!

hash

    ^ super hash bitXor: tokenClass hash

! !

!PPCTrimmingTokenNode methodsFor:'initialization'!

initialize

    super initialize.

    children := Array new: 2

! !

!PPCTrimmingTokenNode methodsFor:'testing'!

isTokenNode

    ^ true

!

isTrimmingTokenNode

    ^ true

! !

!PPCTrimmingTokenNode methodsFor:'visiting'!

accept: visitor

    ^ visitor visitTrimmingTokenNode: self

! !