Example usage for org.antlr.v4.runtime ANTLRErrorListener syntaxError

Introduction

In this page you can find the example usage for org.antlr.v4.runtime ANTLRErrorListener syntaxError.

Prototype

public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine,
        String msg, RecognitionException e);

Source Link

Document

Upon syntax error, notify any interested parties.

Usage

From source file:com.github.jknack.handlebars.internal.HbsParserFactory.java

License:Apache License

/**
 * Creates a new {@link Parser}.//from  www .j  ava 2 s . com
 *
 * @param handlebars The parser owner.
 * @param startDelimiter The start delimiter.
 * @param endDelimiter The end delimiter.
 * @return A new {@link Parser}.
 */
@Override
public Parser create(final Handlebars handlebars, final String startDelimiter, final String endDelimiter) {
    return new Parser() {

        @Override
        public Template parse(final TemplateSource source) throws IOException {
            logger.debug("About to parse: {}", source);
            final ANTLRErrorListener errorReporter = new HbsErrorReporter(source.filename());

            // 1. Lexer
            final HbsLexer lexer = newLexer(newStream(source.filename(), source.content()), startDelimiter,
                    endDelimiter);
            configure(lexer, errorReporter);

            // 2. Parser
            final HbsParser parser = newParser(lexer);
            configure(parser, errorReporter);

            logger.debug("Building AST");
            // 3. Parse
            ParseTree tree = parser.template();

            // remove unnecessary spaces and new lines?
            if (handlebars.prettyPrint()) {
                logger.debug("Applying Mustache spec");
                new ParseTreeWalker().walk(new MustacheSpec(), tree);
            }

            if (lexer.whiteSpaceControl) {
                logger.debug("Applying white spaces control");
                new ParseTreeWalker().walk(new WhiteSpaceControl(), tree);
            }

            /**
             * Build the AST.
             */
            TemplateBuilder builder = new TemplateBuilder(handlebars, source) {
                @Override
                protected void reportError(final CommonToken offendingToken, final int line, final int column,
                        final String message) {
                    errorReporter.syntaxError(parser, offendingToken, line, column, message, null);
                }
            };
            logger.debug("Creating templates");
            Template template = builder.visit(tree);
            return template;
        }

    };
}

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From source file:com.github.jknack.handlebars.internal.HbsParserFactory.java

License:Apache License

/**
 * Creates a new {@link HbsLexer}.// w ww .  j  a v  a  2s .c om
 *
 * @param stream The input stream.
 * @param startDelimiter The start delimiter.
 * @param endDelimiter The end delimiter.
 * @return A new {@link HbsLexer}.
 */
private HbsLexer newLexer(final ANTLRInputStream stream, final String startDelimiter,
        final String endDelimiter) {
    return new HbsLexer(stream, startDelimiter, endDelimiter) {

        @Override
        public void notifyListeners(final LexerNoViableAltException e) {
            String text = _input.getText(Interval.of(_tokenStartCharIndex, _input.index()));
            String msg = "found: '" + getErrorDisplay(text) + "'";
            ANTLRErrorListener listener = getErrorListenerDispatch();
            listener.syntaxError(this, null, _tokenStartLine, _tokenStartCharPositionInLine, msg, e);
        }

        @Override
        public void recover(final LexerNoViableAltException e) {
            throw new IllegalArgumentException(e);
        }
    };
}

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