org.antlr.v4.runtime

类 BailErrorStrategy

java.lang.Object

org.antlr.v4.runtime.DefaultErrorStrategy

org.antlr.v4.runtime.BailErrorStrategy

所有已实现的接口:

ANTLRErrorStrategy

public class BailErrorStrategy
extends DefaultErrorStrategy

This implementation of ANTLRErrorStrategy responds to syntax errors by immediately canceling the parse operation with a ParseCancellationException. The implementation ensures that the ParserRuleContext.exception field is set for all parse tree nodes that were not completed prior to encountering the error.

This error strategy is useful in the following scenarios.

• Two-stage parsing: This error strategy allows the first stage of two-stage parsing to immediately terminate if an error is encountered, and immediately fall back to the second stage. In addition to avoiding wasted work by attempting to recover from errors here, the empty implementation of sync(org.antlr.v4.runtime.Parser) improves the performance of the first stage.
• Silent validation: When syntax errors are not being reported or logged, and the parse result is simply ignored if errors occur, the BailErrorStrategy avoids wasting work on recovering from errors when the result will be ignored either way.

myparser.setErrorHandler(new BailErrorStrategy());

另请参阅:

Parser.setErrorHandler(ANTLRErrorStrategy)

字段概要

从类继承的字段 org.antlr.v4.runtime.DefaultErrorStrategy

errorRecoveryMode, lastErrorIndex, lastErrorStates, nextTokensContext, nextTokensState

构造器概要

构造器

构造器和说明
BailErrorStrategy()

方法概要

限定符和类型	方法和说明
void	recover(Parser recognizer, RecognitionException e) Instead of recovering from exception e, re-throw it wrapped in a ParseCancellationException so it is not caught by the rule function catches.
Token	recoverInline(Parser recognizer) Make sure we don't attempt to recover inline; if the parser successfully recovers, it won't throw an exception.
void	sync(Parser recognizer) Make sure we don't attempt to recover from problems in subrules.

从类继承的方法 org.antlr.v4.runtime.DefaultErrorStrategy

beginErrorCondition, constructToken, consumeUntil, endErrorCondition, escapeWSAndQuote, getErrorRecoverySet, getExpectedTokens, getMissingSymbol, getSymbolText, getSymbolType, getTokenErrorDisplay, inErrorRecoveryMode, notifyErrorListeners, reportError, reportFailedPredicate, reportInputMismatch, reportMatch, reportMissingToken, reportNoViableAlternative, reportUnwantedToken, reset, singleTokenDeletion, singleTokenInsertion

从类继承的方法 java.lang.Object

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

构造器详细资料

BailErrorStrategy

public BailErrorStrategy()

方法详细资料

recover

public void recover(Parser recognizer,
                    RecognitionException e)

Instead of recovering from exception e, re-throw it wrapped in a ParseCancellationException so it is not caught by the rule function catches. Use Throwable.getCause() to get the original RecognitionException.

指定者:

recover 在接口中 ANTLRErrorStrategy

覆盖:

recover 在类中 DefaultErrorStrategy

参数:

recognizer - the parser instance

e - the recognition exception to recover from

另请参阅:

ANTLRErrorStrategy.reportError(org.antlr.v4.runtime.Parser, org.antlr.v4.runtime.RecognitionException)

recoverInline

public Token recoverInline(Parser recognizer)
                    throws RecognitionException

Make sure we don't attempt to recover inline; if the parser successfully recovers, it won't throw an exception.

指定者:

recoverInline 在接口中 ANTLRErrorStrategy

覆盖:

recoverInline 在类中 DefaultErrorStrategy

参数:

recognizer - the parser instance

抛出:

RecognitionException - if the error strategy was not able to recover from the unexpected input symbol

sync

public void sync(Parser recognizer)

Make sure we don't attempt to recover from problems in subrules.

指定者:

sync 在接口中 ANTLRErrorStrategy

覆盖:

sync 在类中 DefaultErrorStrategy

参数:

recognizer - the parser instance

另请参阅:

DefaultErrorStrategy.sync(org.antlr.v4.runtime.Parser)