Merged JK's version from Monticello
Name: PetitParser-JanKurs.260
Author: JanKurs
Time: 17-11-2014, 12:09:05.490 PM
UUID: 07411cef-ef69-40db-9d93-d4018a9b34ef
Name: PetitTests-JanKurs.65
Author: JanKurs
Time: 17-11-2014, 12:09:04.530 PM
UUID: f98d613f-f4ce-4e0e-a7e9-310ee7c7e7a6
Name: PetitSmalltalk-JanKurs.78
Author: JanKurs
Time: 14-11-2014, 05:05:07.765 PM
UUID: 3d68330d-44d5-46c3-9705-97f627b3edbc
Name: PetitCompiler-JanKurs.71
Author: JanKurs
Time: 18-11-2014, 09:48:35.425 AM
UUID: 06352c33-3c76-4382-8536-0cc48e225117
Name: PetitCompiler-Tests-JanKurs.21
Author: JanKurs
Time: 17-11-2014, 05:51:53.134 PM
UUID: 8d6c0799-14e7-4871-8d91-8b0f9886db83
Name: PetitCompiler-Benchmarks-JanKurs.2
Author: JanKurs
Time: 17-11-2014, 05:51:07.887 PM
UUID: d5e3a980-7871-487a-a232-e3ca93fc2483
"{ Package: 'stx:goodies/petitparser' }"
Object subclass:#PPContextMemento
instanceVariableNames:'stream position properties'
classVariableNames:''
poolDictionaries:''
category:'PetitParser-Core'
!
!PPContextMemento methodsFor:'accessing'!
position
^ position
!
position: anInteger
position := anInteger
!
stream
^ stream
!
stream: aStream
stream := aStream
! !
!PPContextMemento methodsFor:'accessing - properties'!
hasProperty: aKey
"Test if the property aKey is present."
^ properties notNil and: [ properties includesKey: aKey ]
!
keysAndValuesDo: aBlock
properties ifNil: [ ^ self ].
properties keysAndValuesDo: [ :key :value | aBlock value: key value: value copy ]
!
propertiesSize
properties ifNil: [ ^ 0 ].
^ properties size.
!
propertyAt: aKey
"Answer the property value associated with aKey."
^ self propertyAt: aKey ifAbsent: [ self error: 'Property not found' ]
!
propertyAt: aKey ifAbsent: aBlock
"Answer the property value associated with aKey or, if aKey isn't found, answer the result of evaluating aBlock."
properties isNil
ifTrue: [ ^ aBlock value ]
ifFalse: [
(properties includesKey: aKey) ifTrue: [
^ (properties at: aKey) copy
].
^ aBlock value
]
!
propertyAt: aKey ifAbsentPut: aBlock
"Answer the property associated with aKey or, if aKey isn't found store the result of evaluating aBlock as new value."
^ self propertyAt: aKey ifAbsent: [ self propertyAt: aKey put: aBlock value ]
!
propertyAt: aKey put: anObject
"Set the property at aKey to be anObject. If aKey is not found, create a new entry for aKey and set is value to anObject. Answer anObject."
^ (properties ifNil: [ properties := Dictionary new: 1 ])
at: aKey put: (anObject copy)
!
removeProperty: aKey
"Remove the property with aKey. Answer the property or raise an error if aKey isn't found."
^ self removeProperty: aKey ifAbsent: [ self error: 'Property not found' ]
!
removeProperty: aKey ifAbsent: aBlock
"Remove the property with aKey. Answer the value or, if aKey isn't found, answer the result of evaluating aBlock."
| answer |
properties isNil ifTrue: [ ^ aBlock value ].
answer := properties removeKey: aKey ifAbsent: aBlock.
properties isEmpty ifTrue: [ properties := nil ].
^ answer
! !
!PPContextMemento methodsFor:'comparing'!
= anObject
(self == anObject) ifTrue: [ ^ true ].
(anObject class = PPContextMemento) ifFalse: [ ^ false ].
(anObject stream == stream) ifFalse: [ ^ false ].
(anObject position = position) ifFalse: [ ^ false ].
(self propertiesSize = anObject propertiesSize) ifFalse: [ ^ false ].
self keysAndValuesDo: [ :key :value |
(anObject hasProperty: key) ifFalse: [ ^ false ].
((anObject propertyAt: key) = value) ifFalse: [ ^ false ].
].
^ true.
!
hash
^ (position hash bitXor: stream hash) bitXor: properties hash.
! !