Example usage for org.antlr.v4.runtime Parser setErrorHandler

Introduction

In this page you can find the example usage for org.antlr.v4.runtime Parser setErrorHandler.

Prototype

public void setErrorHandler(ANTLRErrorStrategy handler) 

Source Link

Usage

From source file:es.ucm.fdi.ac.parser.AntlrTokenizer.java

License:Open Source License

public void tokenize(String source, String sourceFile, PrintWriter out) {
    Writer debugWriter = null;//  w  w  w.  j  av a2s  . c  o  m
    try {
        Lexer lexer = (Lexer) language.lexerConstructor.newInstance(new ANTLRInputStream(source));
        final CommonTokenStream tokens = new CommonTokenStream(lexer);
        tokens.fill();

        if (log.isDebugEnabled()) {
            try {
                debugWriter = new BufferedWriter(
                        new FileWriter(Files.createTempFile("tokens-" + NDC.get() + "-", ".txt").toFile()));
            } catch (IOException ioe) {
                log.warn("Could not create debugWriter", ioe);
            }
        }

        for (final Token tok : tokens.getTokens()) {
            out.print(tokenToString(tok));
            if (log.isDebugEnabled()) {
                log.debug(tok);
                if (debugWriter != null) {
                    debugWriter.write(tokenToString(tok));
                }
            }
        }

        if (parse) {
            Parser parser = (Parser) language.parserConstructor.newInstance(tokens);
            parser.setErrorHandler(new BailErrorStrategy());
            ParserRuleContext parserRuleContext = (ParserRuleContext) language.parserMethod.invoke(parser);

            if (log.isDebugEnabled()) {
                log.debug(Trees.toStringTree(parserRuleContext, parser));
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        throw new IllegalArgumentException("Bad token in source, or failed to parse", e);
    } finally {
        out.flush();
        if (log.isDebugEnabled() && debugWriter != null) {
            try {
                debugWriter.close();
            } catch (IOException ioe) {
                log.warn("Could not close debugWriter", ioe);
            }
        }
    }
}

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From source file:org.tvl.goworks.editor.go.parser.GoParserFactory.java

License:Open Source License

protected void configureParser(@NonNull Parser parser, @NonNull ParserConfiguration configuration) {
    ParserATNSimulator interpreter = parser.getInterpreter();

    // common configuration
    interpreter.force_global_context = false;
    interpreter.always_try_local_context = true;
    interpreter.optimize_tail_calls = true;
    parser.setBuildParseTree(true);/*from w  w  w.  j  a va  2  s  .  c om*/
    parser.removeErrorListeners();

    switch (configuration) {
    case FASTEST:
        interpreter.setPredictionMode(PredictionMode.SLL);
        interpreter.tail_call_preserves_sll = false;
        interpreter.treat_sllk1_conflict_as_ambiguity = true;
        parser.setErrorHandler(new BailErrorStrategy());
        break;

    case SLL:
        throw new UnsupportedOperationException(
                "The tail_call_preserves_sll flag cannot change within a single ATN instance.");
        //interpreter.setPredictionMode(PredictionMode.SLL);
        //interpreter.tail_call_preserves_sll = true;
        //interpreter.treat_sllk1_conflict_as_ambiguity = true;
        //parser.setErrorHandler(new BailErrorStrategy<Token>());
        //break;

    case HYBRID:
        interpreter.setPredictionMode(PredictionMode.LL);
        interpreter.tail_call_preserves_sll = false;
        interpreter.treat_sllk1_conflict_as_ambiguity = true;
        parser.setErrorHandler(new BailErrorStrategy());
        break;

    case HYBRID_SLL:
        throw new UnsupportedOperationException(
                "The tail_call_preserves_sll flag cannot change within a single ATN instance.");
        //interpreter.setPredictionMode(PredictionMode.LL);
        //interpreter.tail_call_preserves_sll = true;
        //interpreter.treat_sllk1_conflict_as_ambiguity = true;
        //parser.setErrorHandler(new BailErrorStrategy<Token>());
        //break;

    case PRECISE:
        interpreter.setPredictionMode(PredictionMode.LL);
        interpreter.tail_call_preserves_sll = false;
        interpreter.treat_sllk1_conflict_as_ambiguity = false;
        parser.setErrorHandler(new DefaultErrorStrategy());
        parser.addErrorListener(DescriptiveErrorListener.INSTANCE);
        break;

    default:
        throw new IllegalArgumentException("Invalid configuration.");
    }
}

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