Codegen: added support for smart action node compiling.
Avoid creation of intermediate result collection for action nodes if all references
to action block's argument (i.e., the nodes collection) is in form of:
* <nodes> at: <numeric constant>
* <nodes> first (second, third...
"{ 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 §'
! !