compiler/PPCTrimNode.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Mon, 23 Nov 2015 11:14:30 +0100
changeset 551 00ebb1b85f53
parent 515 b5316ef15274
permissions -rw-r--r--
Fixed CI scripts on Windows For an unknown reason, unzip on Windows reports status code 50 (presumably "the disk is (or was) full during extraction.") even if there's plenty of space. To workaround this, simply ignore status code 50 on Windows. Sigh.

"{ 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
! !