"{ Package: 'stx:goodies/petitparser' }"
Object subclass:#PPToken
instanceVariableNames:'collection start stop value'
classVariableNames:'NewLineParser'
poolDictionaries:''
category:'PetitParser-Core'
!
!PPToken class methodsFor:'initialization'!
initialize
"Platform independent newline sequence. LF: Unix, CR+LF: Windows, and CR: Apple."
|cr|
cr := Smalltalk isSmalltalkX
ifTrue:[Character return]
ifFalse:[Character cr].
NewLineParser := (Character lf asParser) / (cr asParser , Character lf asParser optional)
! !
!PPToken class methodsFor:'instance creation'!
new
self error: 'Token can only be created using a dedicated constructor.'
!
on: aSequenceableCollection
^ self on: aSequenceableCollection start: 1 stop: aSequenceableCollection size value: nil
!
on: aSequenceableCollection start: aStartInteger stop: aStopInteger
^ self basicNew
initializeOn: aSequenceableCollection
start: aStartInteger stop: aStopInteger
!
on: aSequenceableCollection start: aStartInteger stop: aStopInteger value: anObject
^ self basicNew
initializeOn: aSequenceableCollection
start: aStartInteger stop: aStopInteger
value: anObject
! !
!PPToken methodsFor:'accessing'!
collection
"Answer the underlying collection of this token."
^ collection
!
size
"Answer the size of this token in the underlying collection."
^ stop - start + 1
!
start
"Answer the start position of this token in the underlying collection."
^ start
!
stop
"Answer the stop position of this token in the underlying collection."
^ stop
! !
!PPToken methodsFor:'accessing-values'!
inputValue
"Answer the consumed input of this token."
^ collection copyFrom: start to: stop
!
parsedValue
"Answer the parsed value of this token."
^ value
!
value
self notify: 'Token>>#value is no longer supported. Instead use Token>>#inputValue or the more pragmatic #parsedValue.'.
^ self inputValue
! !
!PPToken methodsFor:'comparing'!
= anObject
^ self class = anObject class and: [ self parsedValue = anObject parsedValue ]
!
hash
^ self parsedValue hash
! !
!PPToken methodsFor:'copying'!
copyFrom: aStartInteger to: aStopInteger
^ self class on: collection start: start + aStartInteger - 1 stop: stop + aStopInteger - 3 value: value
! !
!PPToken methodsFor:'initialization'!
initializeOn: aSequenceableCollection start: aStartInteger stop: aStopInteger
collection := aSequenceableCollection.
start := aStartInteger.
stop := aStopInteger
!
initializeOn: aSequenceableCollection start: aStartInteger stop: aStopInteger value: anObject
collection := aSequenceableCollection.
start := aStartInteger.
stop := aStopInteger.
value := anObject
! !
!PPToken methodsFor:'printing'!
printOn: aStream
super printOn: aStream.
aStream nextPut: $[; print: self start; nextPut: $,; print: self stop; nextPut: $].
aStream nextPut: $(; print: self parsedValue; nextPut: $)
! !
!PPToken methodsFor:'private'!
newline
"Parser a platform independent newline sequence. LF: Unix, CR+LF: Windows, and CR: Apple."
|cr|
cr := Smalltalk isSmalltalkX
ifTrue:[Character return]
ifFalse:[Character cr].
^ (Character lf asParser)
/ (cr asParser , Character lf asParser optional)
! !
!PPToken methodsFor:'querying'!
column
"Answer the column number of this token in the underlying collection."
| position |
position := 0.
(NewLineParser , [ :stream |
start <= stream position
ifTrue: [ ^ start - position ].
position := stream position ] asParser
/ #any asParser) star
parse: collection.
^ start - position
!
line
"Answer the line number of this token in the underlying collection."
| line |
line := 1.
(NewLineParser , [ :stream |
start <= stream position
ifTrue: [ ^ line ].
line := line + 1 ] asParser
/ #any asParser) star
parse: collection.
^ line
! !
!PPToken class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/goodies/petitparser/PPToken.st,v 1.6 2014-03-04 20:10:06 cg Exp $'
!
version_CVS
^ '$Header: /cvs/stx/stx/goodies/petitparser/PPToken.st,v 1.6 2014-03-04 20:10:06 cg Exp $'
!
version_SVN
^ '$Id: PPToken.st,v 1.6 2014-03-04 20:10:06 cg Exp $'
! !
PPToken initialize!