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' }"
PPListParser subclass:#PPSequenceParser
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitParser-Parsers'
!
!PPSequenceParser methodsFor:'operations'!
, aRule
^ self copyWith: aRule
!
permutation: anArrayOfIntegers
"Answer a permutation of the receivers sequence."
anArrayOfIntegers do: [ :index |
(index isInteger and: [ index between: 1 and: parsers size ])
ifFalse: [ self error: 'Invalid permutation index: ' , index printString ] ].
^ self ==> [ :nodes | anArrayOfIntegers collect: [ :index | nodes at: index ] ]
! !
!PPSequenceParser methodsFor:'operators-mapping'!
map: aBlock
^ aBlock numArgs = self children size
ifTrue: [ self ==> [ :nodes | aBlock valueWithArguments: nodes ] ]
ifFalse: [ self error: aBlock numArgs asString , ' arguments expected.' ]
! !
!PPSequenceParser methodsFor:'parsing'!
parseOn: aPPContext
"This is optimized code that avoids unnecessary block activations, do not change."
| memento elements element |
memento := aPPContext remember.
elements := Array new: parsers size.
1 to: parsers size do: [ :index |
element := (parsers at: index)
parseOn: aPPContext.
element isPetitFailure ifTrue: [
aPPContext restore: memento.
^ element ].
elements at: index put: element ].
^ elements
! !
!PPSequenceParser class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/goodies/petitparser/PPSequenceParser.st,v 1.4 2014-03-04 14:33:25 cg Exp $'
!
version_CVS
^ '$Header: /cvs/stx/stx/goodies/petitparser/PPSequenceParser.st,v 1.4 2014-03-04 14:33:25 cg Exp $'
!
version_HG
^ '$Changeset: <not expanded> $'
!
version_SVN
^ '$Id: PPSequenceParser.st,v 1.4 2014-03-04 14:33:25 cg Exp $'
! !