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The ANTLR 4 grammar compiler.

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RecognitionException (ANTLR 4 Runtime (Optimized) 4.7.3 API)













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org.antlr.v4.runtime
Class RecognitionException



java.lang.Object


java.lang.Throwable


java.lang.Exception


java.lang.RuntimeException


org.antlr.v4.runtime.RecognitionException













All Implemented Interfaces:
Serializable


Direct Known Subclasses:
FailedPredicateException, InputMismatchException, LexerNoViableAltException, NoViableAltException




public class RecognitionException
extends RuntimeException
The root of the ANTLR exception hierarchy. In general, ANTLR tracks just
  3 kinds of errors: prediction errors, failed predicate errors, and
  mismatched input errors. In each case, the parser knows where it is
  in the input, where it is in the ATN, the rule invocation stack,
  and what kind of problem occurred.
See Also:
Serialized Form











Constructor Summary

Constructors 

Constructor and Description


RecognitionException(Lexer lexer,
                    CharStream input) 


RecognitionException(Recognizer<Token,?> recognizer,
                    IntStream input,
                    ParserRuleContext ctx) 


RecognitionException(String message,
                    Recognizer<Token,?> recognizer,
                    IntStream input,
                    ParserRuleContext ctx) 









Method Summary

Methods 

Modifier and Type
Method and Description


RuleContext
getContext()
Gets the RuleContext at the time this exception was thrown.



IntervalSet
getExpectedTokens()
Gets the set of input symbols which could potentially follow the
 previously matched symbol at the time this exception was thrown.



IntStream
getInputStream()
Gets the input stream which is the symbol source for the recognizer where
 this exception was thrown.



int
getOffendingState()
Get the ATN state number the parser was in at the time the error
 occurred.



Token
getOffendingToken() 


<T> T
getOffendingToken(Recognizer<T,?> recognizer) 


Recognizer<?,?>
getRecognizer()
Gets the Recognizer where this exception occurred.



protected void
setOffendingState(int offendingState) 


protected <Symbol extends Token> 
void
setOffendingToken(Recognizer<Symbol,?> recognizer,
                 Symbol offendingToken) 






Methods inherited from class java.lang.Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString





Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait














Constructor Detail





RecognitionException
public RecognitionException(@Nullable
                    Lexer lexer,
                    CharStream input)







RecognitionException
public RecognitionException(@Nullable
                    Recognizer<Token,?> recognizer,
                    @Nullable
                    IntStream input,
                    @Nullable
                    ParserRuleContext ctx)







RecognitionException
public RecognitionException(String message,
                    @Nullable
                    Recognizer<Token,?> recognizer,
                    @Nullable
                    IntStream input,
                    @Nullable
                    ParserRuleContext ctx)









Method Detail





getOffendingState
public int getOffendingState()
Get the ATN state number the parser was in at the time the error
 occurred. For NoViableAltException and
 LexerNoViableAltException exceptions, this is the
 DecisionState number. For others, it is the state whose outgoing
 edge we couldn't match.

 If the state number is not known, this method returns -1.







setOffendingState
protected final void setOffendingState(int offendingState)







getExpectedTokens
@Nullable
public IntervalSet getExpectedTokens()
Gets the set of input symbols which could potentially follow the
 previously matched symbol at the time this exception was thrown.

 If the set of expected tokens is not known and could not be computed,
 this method returns null.
Returns:
The set of token types that could potentially follow the current
 state in the ATN, or null if the information is not available.







getContext
@Nullable
public RuleContext getContext()
Gets the RuleContext at the time this exception was thrown.

 If the context is not available, this method returns null.
Returns:
The RuleContext at the time this exception was thrown.
 If the context is not available, this method returns null.







getInputStream
@Nullable
public IntStream getInputStream()
Gets the input stream which is the symbol source for the recognizer where
 this exception was thrown.

 If the input stream is not available, this method returns null.
Returns:
The input stream which is the symbol source for the recognizer
 where this exception was thrown, or null if the stream is not
 available.







getOffendingToken
@Nullable
public Token getOffendingToken()









setOffendingToken
protected final <Symbol extends Token> void setOffendingToken(Recognizer<Symbol,?> recognizer,
                                            @Nullable
                                            Symbol offendingToken)







getRecognizer
@Nullable
public Recognizer<?,?> getRecognizer()
Gets the Recognizer where this exception occurred.

 If the recognizer is not available, this method returns null.
Returns:
The recognizer where this exception occurred, or null if
 the recognizer is not available.







getOffendingToken
public <T> T getOffendingToken(Recognizer<T,?> recognizer)
















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Copyright © 1992–2019 Tunnel Vision Laboratories, LLC. All rights reserved.

Modifier and Type	Method and Description
`RuleContext`	`getContext()` Gets the `RuleContext` at the time this exception was thrown.
`IntervalSet`	`getExpectedTokens()` Gets the set of input symbols which could potentially follow the previously matched symbol at the time this exception was thrown.
`IntStream`	`getInputStream()` Gets the input stream which is the symbol source for the recognizer where this exception was thrown.
`int`	`getOffendingState()` Get the ATN state number the parser was in at the time the error occurred.
`Token`	`getOffendingToken()`
`<T> T`	`getOffendingToken(Recognizer<T,?> recognizer)`
`Recognizer<?,?>`	`getRecognizer()` Gets the `Recognizer` where this exception occurred.
`protected void`	`setOffendingState(int offendingState)`
`protected <Symbol extends Token> void`	`setOffendingToken(Recognizer<Symbol,?> recognizer, Symbol offendingToken)`