"{ Package: 'stx:goodies/petitparser' }"
PPDelegateParser subclass:#PPMemoizedParser
instanceVariableNames:'buffer context hash'
classVariableNames:''
poolDictionaries:''
category:'PetitParser-Parsers'
!
!PPMemoizedParser methodsFor:'operations'!
memoized
"Ther is no point in memoizing more than once."
^ self
! !
!PPMemoizedParser methodsFor:'parsing'!
parseOn: aPPContext
| memento contextMemento aStream |
"TODO: JK memoizing needs review!!"
contextMemento := aPPContext remember.
(hash == aPPContext hash)
ifFalse: [ self reset: aPPContext ].
memento := (buffer at: contextMemento ifAbsentPut: [ PPMemento new ]).
memento contextMemento isNil
ifTrue: [
aStream := aPPContext stream.
memento result: (aStream size - aStream position + 2 < memento count
ifTrue: [ PPFailure message: 'overflow' context: aPPContext ]
ifFalse: [ memento increment. parser parseOn: aPPContext ]).
memento contextMemento: aPPContext remember ]
ifFalse: [ context restore: memento contextMemento ].
^ memento result.
!
reset: aPPContext
hash := aPPContext hash.
context := aPPContext.
buffer := Dictionary new.
! !
!PPMemoizedParser class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/goodies/petitparser/PPMemoizedParser.st,v 1.3 2012-05-04 21:58:48 vrany Exp $'
!
version_CVS
^ '$Header: /cvs/stx/stx/goodies/petitparser/PPMemoizedParser.st,v 1.3 2012-05-04 21:58:48 vrany Exp $'
!
version_SVN
^ '§Id: PPMemoizedParser.st 2 2010-12-17 18:44:23Z vranyj1 §'
! !