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

!Block methodsFor:'*petitparser-core-converting'!

asParser

	"Answer a parser implemented in the receiving one-argument block."

	^ PPPluggableParser on: self

! !

!BlockContext methodsFor:'*petitparser-core-converting'!

asParser

	^ PPPluggableParser on: self

! !

!Character methodsFor:'*petitparser-core-converting'!

asParser

	"Answer a parser that accepts the receiving character."

	^ PPLiteralObjectParser on: self

! !

!Collection methodsFor:'*petitparser-core-converting'!

asChoiceParser

	^ PPChoiceParser withAll: (self collect: [ :each | each asParser ])

! !

!Collection methodsFor:'*petitparser-converting'!

asParser    

	"Create a range of characters between start and stop."

	(self allSatisfy: [ :e | e isCharacter ]) ifTrue: [ 

		| charSet |

		charSet := PPCharSetPredicate on: [ :char | self includes: char ] .

     	^ PPPredicateObjectParser on: charSet message: 'One of these charactes expected: ', self printString.

	].

	^ super asParser

	"

		($a to:$f) asParser parse:'a'

		($a to:$f) asParser parse:'g'

	"

! !

!Collection methodsFor:'*petitparser-core-converting'!

asSequenceParser

	^ PPSequenceParser withAll: (self collect: [ :each | each asParser ])

! !

!Interval methodsFor:'*petitparser-core-converting'!

asParser    

	"Create a range of characters between start and stop."

    self assert:start isCharacter.

    self assert:stop isCharacter.

    self assert:step == 1.

    ^ PPPredicateObjectParser between: start and: stop

    "

		($a to: $f) asParser parse: 'a'

		($a to: $f) asParser parse: 'g'

    "

! !

!Object methodsFor:'*petitparser-core-converting'!

asParser

	"Answer a parser accepting the receiving object."

	^ PPPredicateObjectParser expect: self

! !

!Object methodsFor:'*petitparser-core-testing'!

isPetitFailure

	^ false

! !

!Object methodsFor:'*petitparser-core-testing'!

isPetitParser

	^ false

! !

!PositionableStream methodsFor:'*petitparser-core-converting'!

asPetitStream

	"Some of my subclasses do not use the instance-variables collection, position and readLimit but instead have a completely different internal representation. In these cases just use the super implementation that is inefficient but should work in all cases."

"

	Disabled until we agree on some way how to optimize this

	^ (collection isNil or: [ position isNil or: [ readLimit isNil ] ])

		ifFalse: [ PPStream on: collection from: ( position + 1 ) to: readLimit ]

      ifTrue: [ super asPetitStream ]

"

	^ super asPetitStream

! !

!PositionableStream methodsFor:'*petitparser-core'!

peekTwice

	"Answer what would be returned if the message next were sent to the 

	receiver. If the receiver is at the end, answer nil."

	| array |

	self atEnd 

		ifTrue: [^Array with: nil with: nil].

	array := Array with: (self next) with: (self peek).

	position := position - 1.

	^array

! !

!SequenceableCollection methodsFor:'*petitparser-core-converting'!

asPetitStream

	^ PPStream on: self

! !

!Set methodsFor:'*petitparser-core-converting'!

asParser

	^ PPChoiceParser withAll: (self collect: [ :each | each asParser ])

! !

!Stream methodsFor:'*petitparser-core-converting'!

asPetitStream

	^ self contents asPetitStream

! !

!String methodsFor:'*petitparser-core-converting'!

asParser

	"Answer a parser that accepts the receiving string."

	^ PPLiteralSequenceParser on: self

! !

!Symbol methodsFor:'*petitparser-core-converting'!

asParser

	"Answer a predicate parser named after the receiving symbol. Possible symbols are the method selectors on the class-side of PPPredicateObjectParser."

	^ PPPredicateObjectParser perform: self

! !

!Symbol methodsFor:'Compatibility-Squeak'!

value:anObject

    ^ anObject perform: self.

    "Created: / 18-12-2010 / 16:47:22 / Jan Kurs <kurs.jan@post.cz>"

! !

!Text methodsFor:'*petitparser-core'!

asPetitStream

	^ string asPetitStream

! !

!UndefinedObject methodsFor:'*petitparser-converting'!

asParser

	"Answer a parser that succeeds and does not consume anything."

	^ PPEpsilonParser new

! !

!stx_goodies_petitparser class methodsFor:'documentation'!

extensionsVersion_HG

    ^ '$Changeset: <not expanded> $'

! !