Merged JK's work on PetitCompiler
Name: PetitCompiler-JanKurs.57
Author: JanKurs
Time: 05-11-2014, 05:10:47 AM
UUID: 4c625efe-77fd-465d-bd63-72ead0b5d3ba
Name: PetitCompiler-Tests-JanVrany.13
Author: JanVrany
Time: 05-11-2014, 09:31:07 AM
UUID: 189ae287-6bc1-40ba-8458-b8392c4260a0
"{ Package: 'stx:goodies/petitparser/compiler' }"
Object subclass:#PPCContextMemento
instanceVariableNames:'position properties'
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Context'
!
!PPCContextMemento methodsFor:'accessing'!
position
^ position
!
position: anInteger
position := anInteger
! !
!PPCContextMemento 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: / 26-10-2014 / 01:23:09 / 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
! !
!PPCContextMemento methodsFor:'comparing'!
= anObject
(self == anObject) ifTrue: [ ^ true ].
(anObject class = PPCContextMemento) 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: properties hash.
! !