Examples with ANTLRStringStream org.antlr.runtime.ANTLRStringStream used on opensource projects

Example 31 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project drools by kiegroup.

the class DrlExprParser method parse.

/**
 * Parse an expression from text
 */
public ConstraintConnectiveDescr parse(final String text) {
    ConstraintConnectiveDescr constraint = null;
    try {
        DRLLexer lexer = DRLFactory.getDRLLexer(new ANTLRStringStream(text), languageLevel);
        CommonTokenStream input = new CommonTokenStream(lexer);
        RecognizerSharedState state = new RecognizerSharedState();
        helper = new ParserHelper(input, state, languageLevel);
        DRLExpressions parser = DRLFactory.getDRLExpressions(input, state, helper, languageLevel);
        parser.setBuildDescr(true);
        // setting initial value just in case
        parser.setLeftMostExpr(null);
        BaseDescr expr = parser.conditionalOrExpression();
        if (expr != null && !parser.hasErrors()) {
            constraint = ConstraintConnectiveDescr.newAnd();
            constraint.addOrMerge(expr);
        }
    } catch (RecognitionException e) {
        helper.reportError(e);
    }
    return constraint;
}

Example 32 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project yamcs-studio by yamcs.

the class FormulaAst method createParser.

/**
 * Creates a parser for the given text.
 *
 * @param text the string to be parsed
 * @return the new parser
 */
static FormulaParser createParser(String text) {
    CharStream stream = new ANTLRStringStream(text);
    FormulaLexer lexer = new FormulaLexer(stream);
    TokenStream tokenStream = new CommonTokenStream(lexer);
    return new FormulaParser(tokenStream);
}

Example 33 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project ceylon-compiler by ceylon.

the class IssuesTests_1500_1999 method benchmarkParse.

private void benchmarkParse(String file) throws Exception {
    String readSource = readFile(new File(getPackagePath(), file));
    String source = readSource.toString();
    char[] chars = source.toCharArray();
    LineMap map = Position.makeLineMap(chars, chars.length, false);
    System.err.println(map.hashCode());
    ANTLRStringStream input = new ANTLRStringStream(source);
    CeylonLexer lexer = new CeylonLexer(input);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    CeylonParser parser = new CeylonParser(tokens);
//        CompilationUnit cu = parser.compilationUnit();
//        System.err.println(cu.hashCode());
}

Example 34 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project che by eclipse.

the class ANTLRExpressionParser method parse.

private void parse() throws RecognitionException {
    JavaLexer lexer = new JavaLexer(new ANTLRStringStream(getExpression()));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    JavaParser parser = new JavaParser(tokens);
    nodes = new CommonTreeNodeStream(parser.expression().getTree());
}

Example 35 with ANTLRStringStream

use of org.antlr.runtime.ANTLRStringStream in project cassandra by apache.

the class CqlParserTest method testAddErrorListener.

@Test
public void testAddErrorListener() throws Exception {
    SyntaxErrorCounter firstCounter = new SyntaxErrorCounter();
    SyntaxErrorCounter secondCounter = new SyntaxErrorCounter();
    CharStream stream = new ANTLRStringStream("SELECT * FORM FROM test");
    CqlLexer lexer = new CqlLexer(stream);
    TokenStream tokenStream = new CommonTokenStream(lexer);
    CqlParser parser = new CqlParser(tokenStream);
    parser.addErrorListener(firstCounter);
    parser.addErrorListener(secondCounter);
    // By default CqlParser should recover from the syntax error by removing FORM
    // but as recoverFromMismatchedToken and recover have been overloaded, it will not
    // and the returned ParsedStatement will be null.
    assertNull(parser.query());
    // Only one error must be reported (mismatched: FORM).
    assertEquals(1, firstCounter.count);
    assertEquals(1, secondCounter.count);
}