Example usage for org.antlr.v4.runtime Lexer setInputStream

Introduction

In this page you can find the example usage for org.antlr.v4.runtime Lexer setInputStream.

Prototype

@Override
public void setInputStream(IntStream input) 

Source Link

Document

Set the char stream and reset the lexer

Usage

From source file:nl.lxtreme.libtdl.grammar.TdlFactory.java

License:Apache License

/**
 * Directly creates a parse tree from the given input using the given
 * configuration./*from  ww  w .  j  a v  a2 s . c o  m*/
 * 
 * @param config
 *            the configuration to use, cannot be <code>null</code>;
 * @param input
 *            the input to parse, cannot be <code>null</code>.
 * @return a {@link ParseTree}, never <code>null</code>.
 */
public static ParseTree createParseTree(TdlConfig config, String input) {
    Lexer lexer = createLexer(config);
    lexer.setInputStream(new ANTLRInputStream(input));

    Parser parser = createParser(config);
    parser.setInputStream(new CommonTokenStream(lexer));

    TdlDialect dialect = config.getDialect();
    switch (dialect) {
    case BASIC:
        return ((BasicTdlParser) parser).prog();
    case ADVANCED:
        return ((AdvTdlParser) parser).prog();
    default:
        throw new RuntimeException("Invalid/unknown dialect: " + dialect);
    }
}

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