org.antlr.v4.runtime

Class NoViableAltException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

org.antlr.v4.runtime.RecognitionException

org.antlr.v4.runtime.NoViableAltException

All Implemented Interfaces:

java.io.Serializable

public class NoViableAltException
extends RecognitionException

Indicates that the parser could not decide which of two or more paths to take based upon the remaining input. It tracks the starting token of the offending input and also knows where the parser was in the various paths when the error. Reported by reportNoViableAlternative()

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private ATNConfigSet	deadEndConfigs Which configurations did we try at input.index() that couldn't match input.LT(1)?
private Token	startToken The token object at the start index; the input stream might not be buffering tokens so get a reference to it.

Constructor Summary

Constructors

Constructor and Description
NoViableAltException(Parser recognizer)
NoViableAltException(Parser recognizer, TokenStream input, Token startToken, Token offendingToken, ATNConfigSet deadEndConfigs, ParserRuleContext ctx)

Method Summary

Modifier and Type	Method and Description
ATNConfigSet	getDeadEndConfigs()
Token	getStartToken()

Methods inherited from class org.antlr.v4.runtime.RecognitionException

getCtx, getExpectedTokens, getInputStream, getOffendingState, getOffendingToken, getRecognizer, setOffendingState, setOffendingToken

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

Field Detail

deadEndConfigs

private final ATNConfigSet deadEndConfigs

Which configurations did we try at input.index() that couldn't match input.LT(1)?

startToken

private final Token startToken

The token object at the start index; the input stream might not be buffering tokens so get a reference to it. (At the time the error occurred, of course the stream needs to keep a buffer all of the tokens but later we might not have access to those.)

Constructor Detail

NoViableAltException

public NoViableAltException(Parser recognizer)

NoViableAltException

public NoViableAltException(Parser recognizer,
                            TokenStream input,
                            Token startToken,
                            Token offendingToken,
                            ATNConfigSet deadEndConfigs,
                            ParserRuleContext ctx)

Method Detail

getStartToken

public Token getStartToken()

getDeadEndConfigs

public ATNConfigSet getDeadEndConfigs()