compiler/PPCStarNode.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Tue, 02 Jun 2015 00:16:55 +0100
changeset 479 6316a98b7150
parent 452 9f4558b3be66
child 515 b5316ef15274
permissions -rw-r--r--
Action inlining [1/x]: Initial support for inlining actions parsers (i.e., ==>) The code of the action is now inlined into parsing method rather then delegated to stored block. Mapping parser (i.e., map:[...]) are not supported and not detected, so using them cause crash. This will be fixed later.

"{ 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
! !