Workaround to fix PPComposedTest>>testLeftRecursion - make PPStream>>size returning size of the input.
For whatever reason, in Smalltalk/X ReadStream>>size returns size remaning data, not
the size of a whole stream. This is a bug and should be fixed in Smalltalk/X libbasic. Meanwhile,
override PPStream>>size to return proper value. In Pharo, the method is not needed as the inherited
method is exactly the same.
"{ 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
]
"Created: / 03-10-2014 / 02:17:26 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
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.
! !