source: trunk/yao/share/antlr-2.7.7/lib/cpp/antlr/LLkParser.hpp @ 1

#ifndef INC_LLkParser_hpp__
#define INC_LLkParser_hpp__

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/license.html
 *
 * $Id: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/antlr/LLkParser.hpp#2 $
 */

#include <antlr/config.hpp>
#include <antlr/Parser.hpp>

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif

/**An LL(k) parser.
 *
 * @see antlr.Token
 * @see antlr.TokenBuffer
 * @see antlr.LL1Parser
 */
class ANTLR_API LLkParser : public Parser {
public:
        LLkParser(const ParserSharedInputState& lexer, int k_);

        LLkParser(TokenBuffer& tokenBuf, int k_);

        LLkParser(TokenStream& lexer, int k_);

        /** Consume another token from the input stream.  Can only write sequentially!
         * If you need 3 tokens ahead, you must consume() 3 times.
         * <p>
         * Note that it is possible to overwrite tokens that have not been matched.
         * For example, calling consume() 3 times when k=2, means that the first token
         * consumed will be overwritten with the 3rd.
         */
        virtual inline void consume()
        {
                inputState->getInput().consume();
        }

        virtual inline int LA(unsigned int i)
        {
                return inputState->getInput().LA(i);
        }

        virtual inline RefToken LT(unsigned int i)
        {
                return inputState->getInput().LT(i);
        }
protected:
        /// the lookahead this LL(k) parser is using.
        int k;
private:
        void trace(const char* ee, const char* rname);
public:
        virtual void traceIn(const char* rname);
        virtual void traceOut(const char* rname);
};

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif

#endif //INC_LLkParser_hpp__