compiler/PEGFsaChoiceDeterminizator.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Mon, 18 Jan 2016 08:05:03 +0000
changeset 555 4aa0496e6c22
parent 515 b5316ef15274
permissions -rw-r--r--
For tests on Pharo 5.0, use Spur VM
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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"{ Package: 'stx:goodies/petitparser/compiler' }"
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b5316ef15274 Updated to PetitCompiler-JanKurs.160, PetitCompiler-Tests-JanKurs.112, PetitCompiler-Extras-Tests-JanKurs.25, PetitCompiler-Benchmarks-JanKurs.17
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"{ NameSpace: Smalltalk }"
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b5316ef15274 Updated to PetitCompiler-JanKurs.160, PetitCompiler-Tests-JanKurs.112, PetitCompiler-Extras-Tests-JanKurs.25, PetitCompiler-Benchmarks-JanKurs.17
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PEGFsaAbstractDeterminizator subclass:#PEGFsaChoiceDeterminizator
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	instanceVariableNames:''
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	classVariableNames:''
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	poolDictionaries:''
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	category:'PetitCompiler-FSA'
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!
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b5316ef15274 Updated to PetitCompiler-JanKurs.160, PetitCompiler-Tests-JanKurs.112, PetitCompiler-Extras-Tests-JanKurs.25, PetitCompiler-Benchmarks-JanKurs.17
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!PEGFsaChoiceDeterminizator methodsFor:'as yet unclassified'!
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b5316ef15274 Updated to PetitCompiler-JanKurs.160, PetitCompiler-Tests-JanKurs.112, PetitCompiler-Extras-Tests-JanKurs.25, PetitCompiler-Benchmarks-JanKurs.17
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determinize
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    super determinize.
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b5316ef15274 Updated to PetitCompiler-JanKurs.160, PetitCompiler-Tests-JanKurs.112, PetitCompiler-Extras-Tests-JanKurs.25, PetitCompiler-Benchmarks-JanKurs.17
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    fsa removeLowPriorityTransitions.
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    fsa removeUnreachableStates.
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    fsa removePriorities.
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!
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b5316ef15274 Updated to PetitCompiler-JanKurs.160, PetitCompiler-Tests-JanKurs.112, PetitCompiler-Extras-Tests-JanKurs.25, PetitCompiler-Benchmarks-JanKurs.17
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joinInfo: info with: anotherInfo into: newInfo
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    "Merging into the failure"
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    (info isFsaFailure and: [anotherInfo isFsaFailure not]) ifTrue: [  
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        newInfo final: anotherInfo isFinal.
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        newInfo priority: anotherInfo priority.
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        newInfo failure: false.
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        ^ self
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    ].
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    (anotherInfo isFsaFailure and: [info isFsaFailure not]) ifTrue: [  
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        newInfo final: info isFinal.
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        newInfo priority: (anotherInfo priority max: info priority).
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        newInfo failure: false.
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        ^ self
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    ].
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    (info hasEqualPriorityTo: anotherInfo) ifTrue: [ 
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        newInfo final: (info isFinal or: [ anotherInfo isFinal ]).
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        newInfo failure: (info isFsaFailure or: [anotherInfo isFailure]).
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        newInfo priority: info priority.	
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        ^ self
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    ].
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    (info hasHigherPriorityThan: anotherInfo) ifTrue: [ 
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 		newInfo priority: info priority.	
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        newInfo failure: info isFsaFailure.
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        newInfo final: info isFinal.
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        ^ self
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    ].
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    newInfo priority: anotherInfo priority.
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    newInfo failure: anotherInfo isFsaFailure.
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    newInfo final: anotherInfo isFinal.
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!
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joinState: state with: anotherState
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    self assert: state isMultivalue not.
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    self assert: anotherState isMultivalue not.
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    ^ super joinState: state with: anotherState
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!
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joinTransitions: state with: anotherState into: newState
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    self assert: newState isMultivalue not.
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    newState transitions addAll: (state transitions collect: #copy).
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    newState transitions addAll: (anotherState transitions collect: #copy).
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    newState mergeTransitions.
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! !
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!PEGFsaChoiceDeterminizator methodsFor:'joining'!
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joinRetval: state with: anotherState into: newState
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    "Different retvals cannot merge their info"
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    self assert: (state hasDifferentRetvalThan: anotherState) not. 
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    self assert: state retval == anotherState retval.
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! !
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