Example usage for org.antlr.v4.runtime NoViableAltException getDeadEndConfigs

Introduction

In this page you can find the example usage for org.antlr.v4.runtime NoViableAltException getDeadEndConfigs.

Prototype

public ATNConfigSet getDeadEndConfigs() 

Source Link

Usage

From source file:org.eclipse.titan.common.parsers.ParserLogger.java

License:Open Source License

/**
 * Rule exception info in string format for logging purpose
 * @param aRule rule//w  w  w  .  ja  va 2  s .  co  m
 * @param aTokenNameResolver resolver to get token name
 * @return exception stack trace + some other info from the exception object
 */
private static String getExceptionInfo(final ParserRuleContext aRule,
        final TokenNameResolver aTokenNameResolver) {
    final RecognitionException e = aRule.exception;
    if (e == null) {
        return "";
    }
    final StringBuilder sb = new StringBuilder();
    sb.append("\naRule.getText() == " + aRule.getText());
    sb.append("\ngetOffendingState() == " + e.getOffendingState());
    sb.append("\ngetExpectedTokens() == [");
    final List<Integer> expectedTokens = e.getExpectedTokens().toList();
    for (int i = 0; i < expectedTokens.size(); i++) {
        if (i > 0) {
            sb.append(", ");
        }
        final int tokenType = expectedTokens.get(i);
        sb.append(getTokenName(tokenType, aTokenNameResolver));
    }
    sb.append("]");
    if (e instanceof NoViableAltException) {
        NoViableAltException nvae = (NoViableAltException) e;
        sb.append("\ngetStartToken() == " + getTokenInfo(nvae.getStartToken(), aTokenNameResolver));
        sb.append("\ngetDeadEndConfigs() == " + nvae.getDeadEndConfigs());
    }

    final StringWriter errors = new StringWriter();
    e.printStackTrace(new PrintWriter(errors));
    sb.append("\n" + errors.toString());
    return sb.toString();
}

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