"{ Package: 'squeak:petitparser' }"

PPLiteralParser subclass:#PPLiteralSequenceParser
	instanceVariableNames:'size'
	classVariableNames:''
	poolDictionaries:''
	category:'PetitParser-Parsers'
!

PPLiteralSequenceParser comment:'A parser accepts a sequence of literal objects, such as a String. This is an optimization to avoid having to compose longer sequences from PPSequenceParser.'
!


!PPLiteralSequenceParser methodsFor:'accessing'!

size
	"Answer the sequence size of the receiver."

	^ size
! !

!PPLiteralSequenceParser methodsFor:'initialization'!

initializeOn: anObject message: aString
	super initializeOn: anObject message: aString.
	size := literal size
! !

!PPLiteralSequenceParser methodsFor:'operators'!

caseInsensitive
	"Answer a parser that can parse the receiver case-insensitive."
	
	literal asUppercase = literal asLowercase ifTrue: [ ^ self ].
	^ PPPredicateSequenceParser on: [ :value | literal sameAs: value ] message: message size: size
! !

!PPLiteralSequenceParser methodsFor:'parsing'!

parseOn: aStream
	| position result |
	position := aStream position.
	result := aStream next: size.
	literal = result ifTrue: [ ^ result ].
	aStream position: position.
	^ PPFailure message: message at: aStream position
! !

!PPLiteralSequenceParser class methodsFor:'documentation'!

version_SVN
    ^ '$Id: PPLiteralSequenceParser.st,v 1.1 2011-08-18 18:56:17 cg Exp $'
! !