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Improved encapsulation in ParserATNSimulator

This commit is contained in:
Sam Harwell 2013-04-24 10:35:26 -05:00
parent ef8b10ebc4
commit 1a07a6b6fa
1 changed files with 31 additions and 27 deletions
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58
runtime/Java/src/org/antlr/v4/runtime/atn/ParserATNSimulator.java
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@ -269,7 +269,8 @@ public class ParserATNSimulator extends ATNSimulator {
public final DFA[] decisionToDFA; public final DFA[] decisionToDFA;
/** SLL, LL, or LL + exact ambig detection? */ /** SLL, LL, or LL + exact ambig detection? */
protected PredictionMode mode = PredictionMode.LL; @NotNull
private PredictionMode mode = PredictionMode.LL;
/** Each prediction operation uses a cache for merge of prediction contexts. /** Each prediction operation uses a cache for merge of prediction contexts.
* Don't keep around as it wastes huge amounts of memory. DoubleKeyMap * Don't keep around as it wastes huge amounts of memory. DoubleKeyMap
@ -348,7 +349,7 @@ public class ParserATNSimulator extends ATNSimulator {
} }
} }
public int predictATN(@NotNull DFA dfa, @NotNull TokenStream input, protected int predictATN(@NotNull DFA dfa, @NotNull TokenStream input,
@Nullable ParserRuleContext outerContext) @Nullable ParserRuleContext outerContext)
{ {
if ( outerContext==null ) outerContext = ParserRuleContext.EMPTY; if ( outerContext==null ) outerContext = ParserRuleContext.EMPTY;
@ -412,7 +413,7 @@ public class ParserATNSimulator extends ATNSimulator {
conflict conflict
conflict + preds conflict + preds
*/ */
public int execATN(@NotNull DFA dfa, @NotNull DFAState s0, protected int execATN(@NotNull DFA dfa, @NotNull DFAState s0,
@NotNull TokenStream input, int startIndex, @NotNull TokenStream input, int startIndex,
ParserRuleContext outerContext) ParserRuleContext outerContext)
{ {
@ -640,12 +641,12 @@ public class ParserATNSimulator extends ATNSimulator {
} }
// comes back with reach.uniqueAlt set to a valid alt // comes back with reach.uniqueAlt set to a valid alt
public int execATNWithFullContext(DFA dfa, protected int execATNWithFullContext(DFA dfa,
DFAState D, // how far we got before failing over DFAState D, // how far we got before failing over
@NotNull ATNConfigSet s0, @NotNull ATNConfigSet s0,
@NotNull TokenStream input, int startIndex, @NotNull TokenStream input, int startIndex,
ParserRuleContext outerContext, ParserRuleContext outerContext,
int SLL_min_alt) // todo: is this in D as min ambig alts? int SLL_min_alt) // todo: is this in D as min ambig alts?
{ {
retry_with_context++; retry_with_context++;
reportAttemptingFullContext(dfa, s0, startIndex, input.index()); reportAttemptingFullContext(dfa, s0, startIndex, input.index());
@ -946,7 +947,7 @@ public class ParserATNSimulator extends ATNSimulator {
} }
@NotNull @NotNull
public ATNConfigSet computeStartState(@NotNull ATNState p, protected ATNConfigSet computeStartState(@NotNull ATNState p,
@Nullable RuleContext ctx, @Nullable RuleContext ctx,
boolean fullCtx) boolean fullCtx)
{ {
@ -965,7 +966,7 @@ public class ParserATNSimulator extends ATNSimulator {
} }
@Nullable @Nullable
public ATNState getReachableTarget(@NotNull Transition trans, int ttype) { protected ATNState getReachableTarget(@NotNull Transition trans, int ttype) {
if (trans.matches(ttype, 0, atn.maxTokenType)) { if (trans.matches(ttype, 0, atn.maxTokenType)) {
return trans.target; return trans.target;
} }
@ -973,7 +974,7 @@ public class ParserATNSimulator extends ATNSimulator {
return null; return null;
} }
public SemanticContext[] getPredsForAmbigAlts(@NotNull BitSet ambigAlts, protected SemanticContext[] getPredsForAmbigAlts(@NotNull BitSet ambigAlts,
@NotNull ATNConfigSet configs, @NotNull ATNConfigSet configs,
int nalts) int nalts)
{ {
@ -1017,7 +1018,7 @@ public class ParserATNSimulator extends ATNSimulator {
return altToPred; return altToPred;
} }
public DFAState.PredPrediction[] getPredicatePredictions(BitSet ambigAlts, protected DFAState.PredPrediction[] getPredicatePredictions(BitSet ambigAlts,
SemanticContext[] altToPred) SemanticContext[] altToPred)
{ {
List<DFAState.PredPrediction> pairs = new ArrayList<DFAState.PredPrediction>(); List<DFAState.PredPrediction> pairs = new ArrayList<DFAState.PredPrediction>();
@ -1042,7 +1043,7 @@ public class ParserATNSimulator extends ATNSimulator {
return pairs.toArray(new DFAState.PredPrediction[pairs.size()]); return pairs.toArray(new DFAState.PredPrediction[pairs.size()]);
} }
public int getAltThatFinishedDecisionEntryRule(ATNConfigSet configs) { protected int getAltThatFinishedDecisionEntryRule(ATNConfigSet configs) {
IntervalSet alts = new IntervalSet(); IntervalSet alts = new IntervalSet();
for (ATNConfig c : configs) { for (ATNConfig c : configs) {
if ( c.reachesIntoOuterContext>0 || (c.state instanceof RuleStopState && c.context.hasEmptyPath()) ) { if ( c.reachesIntoOuterContext>0 || (c.state instanceof RuleStopState && c.context.hasEmptyPath()) ) {
@ -1059,7 +1060,7 @@ public class ParserATNSimulator extends ATNSimulator {
* then we stop at the first predicate that evaluates to true. This * then we stop at the first predicate that evaluates to true. This
* includes pairs with null predicates. * includes pairs with null predicates.
*/ */
public BitSet evalSemanticContext(@NotNull DFAState.PredPrediction[] predPredictions, protected BitSet evalSemanticContext(@NotNull DFAState.PredPrediction[] predPredictions,
ParserRuleContext outerContext, ParserRuleContext outerContext,
boolean complete) boolean complete)
{ {
@ -1227,7 +1228,7 @@ public class ParserATNSimulator extends ATNSimulator {
} }
@Nullable @Nullable
public ATNConfig getEpsilonTarget(@NotNull ATNConfig config, protected ATNConfig getEpsilonTarget(@NotNull ATNConfig config,
@NotNull Transition t, @NotNull Transition t,
boolean collectPredicates, boolean collectPredicates,
boolean inContext, boolean inContext,
@ -1255,13 +1256,13 @@ public class ParserATNSimulator extends ATNSimulator {
} }
@NotNull @NotNull
public ATNConfig actionTransition(@NotNull ATNConfig config, @NotNull ActionTransition t) { protected ATNConfig actionTransition(@NotNull ATNConfig config, @NotNull ActionTransition t) {
if ( debug ) System.out.println("ACTION edge "+t.ruleIndex+":"+t.actionIndex); if ( debug ) System.out.println("ACTION edge "+t.ruleIndex+":"+t.actionIndex);
return new ATNConfig(config, t.target); return new ATNConfig(config, t.target);
} }
@Nullable @Nullable
public ATNConfig predTransition(@NotNull ATNConfig config, protected ATNConfig predTransition(@NotNull ATNConfig config,
@NotNull PredicateTransition pt, @NotNull PredicateTransition pt,
boolean collectPredicates, boolean collectPredicates,
boolean inContext, boolean inContext,
@ -1309,7 +1310,7 @@ public class ParserATNSimulator extends ATNSimulator {
} }
@NotNull @NotNull
public ATNConfig ruleTransition(@NotNull ATNConfig config, @NotNull RuleTransition t) { protected ATNConfig ruleTransition(@NotNull ATNConfig config, @NotNull RuleTransition t) {
if ( debug ) { if ( debug ) {
System.out.println("CALL rule "+getRuleName(t.target.ruleIndex)+ System.out.println("CALL rule "+getRuleName(t.target.ruleIndex)+
", ctx="+config.context); ", ctx="+config.context);
@ -1321,7 +1322,7 @@ public class ParserATNSimulator extends ATNSimulator {
return new ATNConfig(config, t.target, newContext); return new ATNConfig(config, t.target, newContext);
} }
public BitSet getConflictingAlts(ATNConfigSet configs) { protected BitSet getConflictingAlts(ATNConfigSet configs) {
Collection<BitSet> altsets = PredictionMode.getConflictingAltSubsets(configs); Collection<BitSet> altsets = PredictionMode.getConflictingAltSubsets(configs);
return PredictionMode.getAlts(altsets); return PredictionMode.getAlts(altsets);
} }
@ -1416,7 +1417,7 @@ public class ParserATNSimulator extends ATNSimulator {
} }
@NotNull @NotNull
public NoViableAltException noViableAlt(@NotNull TokenStream input, protected NoViableAltException noViableAlt(@NotNull TokenStream input,
@NotNull ParserRuleContext outerContext, @NotNull ParserRuleContext outerContext,
@NotNull ATNConfigSet configs, @NotNull ATNConfigSet configs,
int startIndex) int startIndex)
@ -1427,7 +1428,7 @@ public class ParserATNSimulator extends ATNSimulator {
configs, outerContext); configs, outerContext);
} }
public static int getUniqueAlt(@NotNull ATNConfigSet configs) { protected static int getUniqueAlt(@NotNull ATNConfigSet configs) {
int alt = ATN.INVALID_ALT_NUMBER; int alt = ATN.INVALID_ALT_NUMBER;
for (ATNConfig c : configs) { for (ATNConfig c : configs) {
if ( alt == ATN.INVALID_ALT_NUMBER ) { if ( alt == ATN.INVALID_ALT_NUMBER ) {
@ -1479,7 +1480,7 @@ public class ParserATNSimulator extends ATNSimulator {
} }
} }
public void reportAttemptingFullContext(DFA dfa, ATNConfigSet configs, int startIndex, int stopIndex) { protected void reportAttemptingFullContext(DFA dfa, ATNConfigSet configs, int startIndex, int stopIndex) {
if ( debug || retry_debug ) { if ( debug || retry_debug ) {
Interval interval = Interval.of(startIndex, stopIndex); Interval interval = Interval.of(startIndex, stopIndex);
System.out.println("reportAttemptingFullContext decision="+dfa.decision+":"+configs+ System.out.println("reportAttemptingFullContext decision="+dfa.decision+":"+configs+
@ -1488,7 +1489,7 @@ public class ParserATNSimulator extends ATNSimulator {
if ( parser!=null ) parser.getErrorListenerDispatch().reportAttemptingFullContext(parser, dfa, startIndex, stopIndex, configs); if ( parser!=null ) parser.getErrorListenerDispatch().reportAttemptingFullContext(parser, dfa, startIndex, stopIndex, configs);
} }
public void reportContextSensitivity(DFA dfa, ATNConfigSet configs, int startIndex, int stopIndex) { protected void reportContextSensitivity(DFA dfa, ATNConfigSet configs, int startIndex, int stopIndex) {
if ( debug || retry_debug ) { if ( debug || retry_debug ) {
Interval interval = Interval.of(startIndex, stopIndex); Interval interval = Interval.of(startIndex, stopIndex);
System.out.println("reportContextSensitivity decision="+dfa.decision+":"+configs+ System.out.println("reportContextSensitivity decision="+dfa.decision+":"+configs+
@ -1498,7 +1499,7 @@ public class ParserATNSimulator extends ATNSimulator {
} }
/** If context sensitive parsing, we know it's ambiguity not conflict */ /** If context sensitive parsing, we know it's ambiguity not conflict */
public void reportAmbiguity(@NotNull DFA dfa, DFAState D, int startIndex, int stopIndex, protected void reportAmbiguity(@NotNull DFA dfa, DFAState D, int startIndex, int stopIndex,
@NotNull BitSet ambigAlts, @NotNull BitSet ambigAlts,
@NotNull ATNConfigSet configs) @NotNull ATNConfigSet configs)
{ {
@ -1528,9 +1529,12 @@ public class ParserATNSimulator extends ATNSimulator {
ambigAlts, configs); ambigAlts, configs);
} }
public void setPredictionMode(PredictionMode mode) { public final void setPredictionMode(@NotNull PredictionMode mode) {
this.mode = mode; this.mode = mode;
} }
public PredictionMode getPredictionMode() { return mode; } @NotNull
public final PredictionMode getPredictionMode() {
return mode;
}
} }