compiler/PPCStarNode.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Sun, 10 May 2015 06:28:36 +0100
changeset 452 9f4558b3be66
parent 438 20598d7ce9fa
child 515 b5316ef15274
permissions -rw-r--r--
Updated to PetitCompiler-JanKurs.111, PetitCompiler-Tests-JanKurs.51, PetitCompiler-Benchmarks-JanKurs.7, added PetitCompiler-Extras-Tests-JanKurs.4 Name: PetitCompiler-JanKurs.111 Author: JanKurs Time: 08-05-2015, 05:56:05.327 PM UUID: 8805e696-9933-49b8-a5c8-a963b931b996 Name: PetitCompiler-Tests-JanKurs.51 Author: JanKurs Time: 08-05-2015, 05:17:44.224 PM UUID: 21c24114-73be-4ba2-86cd-5a4402f778a0 Name: PetitCompiler-Benchmarks-JanKurs.7 Author: JanKurs Time: 07-05-2015, 06:06:12.918 PM UUID: 0e6e2c0a-90f6-4f46-9663-c66f636da602 Name: PetitCompiler-Extras-Tests-JanKurs.4 Author: JanKurs Time: 08-05-2015, 05:56:46.180 PM UUID: 4d4d4d23-c5bc-41ef-ad41-8a56528ddb42

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

"{ NameSpace: Smalltalk }"

PPCDelegateNode subclass:#PPCStarNode
	instanceVariableNames:''
	classVariableNames:''
	poolDictionaries:''
	category:'PetitCompiler-Nodes'
!

!PPCStarNode methodsFor:'accessing'!

acceptsEpsilon
    ^ true
!

acceptsEpsilonOpenSet: set
    ^ true
!

prefix
    ^ #star
! !

!PPCStarNode methodsFor:'analysis'!

isNullable
    ^ true
!

recognizedSentencesPrim
    ^ 	#()
! !

!PPCStarNode methodsFor:'first follow next'!

followSets: aFollowDictionary firstSets: aFirstDictionary into: aSet suchThat: aBlock
    | first |
    super followSets: aFollowDictionary firstSets:  aFirstDictionary into: aSet suchThat: aBlock.
    
    first := aFirstDictionary at: self.

    self children do: [ :el | 
        (aFollowDictionary at: el) addAll: (first reject: [:each | each isNullable])
    ]
! !

!PPCStarNode methodsFor:'visiting'!

accept: visitor
    ^ visitor visitStarNode: self
! !