org.antlr.analysis
Class LL1DFA

java.lang.Object
  org.antlr.analysis.DFA
      org.antlr.analysis.LL1DFA

public class LL1DFA
extends DFA

A special DFA that is exactly LL(1) or LL(1) with backtracking mode predicates to resolve edge set collisions.

Field Summary

Fields inherited from class org.antlr.analysis.DFA

accept, altToAcceptState, cyclic, CYCLIC_BUSY, CYCLIC_DONE, CYCLIC_UNKNOWN, decisionNFAStartState, decisionNumber, description, edgeTransitionClass, edgeTransitionClassMap, eof, eot, generator, hasPredicateBlockedByAction, max, max_k, MAX_STATE_TRANSITIONS_FOR_TABLE, MAX_TIME_PER_DFA_CREATION, min, nAlts, nfa, nfaConverter, numberOfStates, predicateVisible, probe, REACHABLE_BUSY, REACHABLE_NO, REACHABLE_UNKNOWN, REACHABLE_YES, recursiveAltSet, reduced, special, specialStates, specialStateSTs, startState, stateCounter, states, transition, transitionEdgeTables, uniqueCompressedSpecialStateNum, uniqueStates, unreachableAlts, user_k

Constructor Summary

LL1DFA(int decisionNumber, NFAState decisionStartState, LookaheadSet[] altLook)
From list of lookahead sets (one per alt in decision), create an LL(1) DFA.

LL1DFA(int decisionNumber, NFAState decisionStartState, MultiMap<IntervalSet,Integer> edgeMap)
From a set of edgeset->list-of-alts mappings, create a DFA that uses syn preds for all |list-of-alts|>1.

Method Summary

protected Label	getLabelForSet(IntervalSet edgeSet)
protected SemanticContext.Predicate	getSynPredForAlt(NFAState decisionStartState, int alt)

Methods inherited from class org.antlr.analysis.DFA

addState, canInlineDecision, createEOTAndEOFTables, createMinMaxTables, createSpecialTable, createStateTables, createTransitionTableEntryForState, doesStateReachAcceptState, findAllGatedSynPredsUsedInDFAAcceptStates, getAcceptState, getAutoBacktrackMode, getDecisionASTNode, getDecisionNumber, getDescription, getHasSynPred, getJavaCompressedAccept, getJavaCompressedEOF, getJavaCompressedEOT, getJavaCompressedMax, getJavaCompressedMin, getJavaCompressedSpecial, getJavaCompressedTransition, getMaxLookaheadDepth, getMaxStateNumber, getNFADecisionStartState, getNumberOfAlts, getNumberOfStates, getReasonForFailure, getRunLengthEncoding, getState, getUniqueStates, getUnreachableAlts, getUserMaxLookahead, hasCycle, hasSemPred, hasSynPred, initAltRelatedInfo, isClassicDFA, isCyclic, isGreedy, isReduced, isTokensRuleDecision, newState, okToRetryDFAWithK1, predict, removeState, resetStateNumbersToBeContiguous, setAcceptState, setState, setUserMaxLookahead, toString, verify

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LL1DFA

public LL1DFA(int decisionNumber,
              NFAState decisionStartState,
              LookaheadSet[] altLook)

From list of lookahead sets (one per alt in decision), create an LL(1) DFA. One edge per set. s0-{alt1}->:o=>1 | \ | -{alt2}->:o=>2 | ...

LL1DFA

public LL1DFA(int decisionNumber,
              NFAState decisionStartState,
              MultiMap<IntervalSet,Integer> edgeMap)

From a set of edgeset->list-of-alts mappings, create a DFA that uses syn preds for all |list-of-alts|>1.

Method Detail

getLabelForSet

protected Label getLabelForSet(IntervalSet edgeSet)

getSynPredForAlt

protected SemanticContext.Predicate getSynPredForAlt(NFAState decisionStartState,
                                                     int alt)