Portability fixes
* do not use Object>>asString. Not all Smalltalks implement it.
* do not use Object>>name. Not all Smalltalks implement it.
* do not use Dictionary keysAndValuesRemove:. Not all Smalltalks implement it.
* do not use Class>>methods The semantics is different among Smalltalks.
Use `Class methodDictionary values` instead.
* do not modify dictionary in #at:ifAbsentPut: block!
"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
PEGFsaAbstractDeterminizator subclass:#PEGFsaChoiceDeterminizator
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-FSA'
!
!PEGFsaChoiceDeterminizator methodsFor:'as yet unclassified'!
determinize
super determinize.
fsa removeLowPriorityTransitions.
fsa removeUnreachableStates.
fsa removePriorities.
!
joinInfo: info with: anotherInfo into: newInfo
"Merging into the failure"
(info isFsaFailure and: [anotherInfo isFsaFailure not]) ifTrue: [
newInfo final: anotherInfo isFinal.
newInfo priority: anotherInfo priority.
newInfo failure: false.
^ self
].
(anotherInfo isFsaFailure and: [info isFsaFailure not]) ifTrue: [
newInfo final: info isFinal.
newInfo priority: (anotherInfo priority max: info priority).
newInfo failure: false.
^ self
].
(info hasEqualPriorityTo: anotherInfo) ifTrue: [
newInfo final: (info isFinal or: [ anotherInfo isFinal ]).
newInfo failure: (info isFsaFailure or: [anotherInfo isFailure]).
newInfo priority: info priority.
^ self
].
(info hasHigherPriorityThan: anotherInfo) ifTrue: [
newInfo priority: info priority.
newInfo failure: info isFsaFailure.
newInfo final: info isFinal.
^ self
].
newInfo priority: anotherInfo priority.
newInfo failure: anotherInfo isFsaFailure.
newInfo final: anotherInfo isFinal.
!
joinState: state with: anotherState
self assert: state isMultivalue not.
self assert: anotherState isMultivalue not.
^ super joinState: state with: anotherState
!
joinTransitions: state with: anotherState into: newState
self assert: newState isMultivalue not.
newState transitions addAll: (state transitions collect: #copy).
newState transitions addAll: (anotherState transitions collect: #copy).
newState mergeTransitions.
! !
!PEGFsaChoiceDeterminizator methodsFor:'joining'!
joinRetval: state with: anotherState into: newState
"Different retvals cannot merge their info"
self assert: (state hasDifferentRetvalThan: anotherState) not.
self assert: state retval == anotherState retval.
! !