Package org.antlr.runtime.debug
Class DebugParser
java.lang.Object
org.antlr.runtime.BaseRecognizer
org.antlr.runtime.Parser
org.antlr.runtime.debug.DebugParser
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected DebugEventListener
Who to notify when events in the parser occur.boolean
Used to differentiate between fixed lookahead and cyclic DFA decisions while profiling.Fields inherited from class org.antlr.runtime.BaseRecognizer
DEFAULT_TOKEN_CHANNEL, HIDDEN, INITIAL_FOLLOW_STACK_SIZE, MEMO_RULE_FAILED, MEMO_RULE_UNKNOWN, NEXT_TOKEN_RULE_NAME, state
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Constructor Summary
ConstructorsConstructorDescriptionDebugParser
(TokenStream input, DebugEventListener dbg) DebugParser
(TokenStream input, DebugEventListener dbg, RecognizerSharedState state) Create a normal parser except wrap the token stream in a debug proxy that fires consume events.DebugParser
(TokenStream input, RecognizerSharedState state) -
Method Summary
Modifier and TypeMethodDescriptionvoid
beginBacktrack
(int level) void
A hook to listen in on the token consumption during error recovery.void
endBacktrack
(int level, boolean successful) void
void
void
Report a recognition problem.void
Provide a new debug event listener for this parser.Methods inherited from class org.antlr.runtime.Parser
getCurrentInputSymbol, getMissingSymbol, getSourceName, getTokenStream, reset, setTokenStream, traceIn, traceOut
Methods inherited from class org.antlr.runtime.BaseRecognizer
alreadyParsedRule, combineFollows, computeContextSensitiveRuleFOLLOW, computeErrorRecoverySet, consumeUntil, consumeUntil, displayRecognitionError, emitErrorMessage, failed, getBacktrackingLevel, getErrorHeader, getErrorMessage, getGrammarFileName, getNumberOfSyntaxErrors, getRuleInvocationStack, getRuleInvocationStack, getRuleMemoization, getRuleMemoizationCacheSize, getTokenErrorDisplay, getTokenNames, match, matchAny, memoize, mismatchIsMissingToken, mismatchIsUnwantedToken, pushFollow, recover, recoverFromMismatchedSet, recoverFromMismatchedToken, setBacktrackingLevel, toStrings, traceIn, traceOut
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Field Details
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dbg
Who to notify when events in the parser occur. -
isCyclicDecision
public boolean isCyclicDecisionUsed to differentiate between fixed lookahead and cyclic DFA decisions while profiling.
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Constructor Details
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DebugParser
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Method Details
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setDebugListener
Provide a new debug event listener for this parser. Notify the input stream too that it should send events to this listener. -
getDebugListener
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reportError
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beginResync
public void beginResync()Description copied from class:BaseRecognizer
A hook to listen in on the token consumption during error recovery. The DebugParser subclasses this to fire events to the listenter.- Overrides:
beginResync
in classBaseRecognizer
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endResync
public void endResync()- Overrides:
endResync
in classBaseRecognizer
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beginBacktrack
public void beginBacktrack(int level) -
endBacktrack
public void endBacktrack(int level, boolean successful) -
reportError
Description copied from class:BaseRecognizer
Report a recognition problem. This method sets errorRecovery to indicate the parser is recovering not parsing. Once in recovery mode, no errors are generated. To get out of recovery mode, the parser must successfully match a token (after a resync). So it will go: 1. error occurs 2. enter recovery mode, report error 3. consume until token found in resynch set 4. try to resume parsing 5. next match() will reset errorRecovery mode If you override, make sure to update syntaxErrors if you care about that.- Overrides:
reportError
in classBaseRecognizer
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