"{ Package: 'squeak: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 1.1 2011-08-18 18:56:17 cg Exp $'

! !