compiler/PPCNilNode.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Fri, 19 Jun 2015 07:14:07 +0100
changeset 500 cf3cbf3933f1
parent 452 9f4558b3be66
child 502 1e45d3c96ec5
permissions -rw-r--r--
Use RBVariableNode>>name: to change variable's name. The old way - `node token value:` is working in Pharo - there's no token in RBVariableNode. Sigh.

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

"{ NameSpace: Smalltalk }"

PPCNode subclass:#PPCNilNode
	instanceVariableNames:''
	classVariableNames:''
	poolDictionaries:''
	category:'PetitCompiler-Nodes'
!

!PPCNilNode methodsFor:'accessing'!

prefix
    ^ #nil
! !

!PPCNilNode methodsFor:'analysis'!

acceptsEpsilon
    ^ true
!

firstCharSet
    ^ PPCharSetPredicate on: [:e | false ] 
!

isNullable
    ^ true
! !

!PPCNilNode methodsFor:'visiting'!

accept: visitor
    ^ visitor visitNilNode: self
! !