"{ Package: 'stx:goodies/petitparser' }"

PPListParser subclass:#PPSequenceParser
	instanceVariableNames:''
	classVariableNames:''
	poolDictionaries:''
	category:'PetitParser-Parsers'
!

PPSequenceParser comment:'A parser that parses a sequence of parsers.'
!


!PPSequenceParser methodsFor:'operations'!

, aRule
	^ self copyWith: aRule
!

map: aBlock
	^ self ==> [ :nodes | aBlock valueWithArguments: nodes ]
!

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:'parsing'!

parseOn: aStream
	"This is optimized code that avoids unnecessary block activations, do not change."

	| start elements element |
	start := aStream position.
	elements := Array new: parsers size.
	1 to: parsers size do: [ :index |
		element := (parsers at: index)
			parseOn: aStream.
		element isPetitFailure ifTrue: [
			aStream position: start.
			^ element ].
		elements at: index put: element ].
	^ elements
! !

!PPSequenceParser class methodsFor:'documentation'!

version_SVN
    ^ '$Id: PPSequenceParser.st,v 1.2 2012-01-13 11:22:50 cg Exp $'
! !