source: trunk/yao/share/antlr-2.7.7/lib/cpp/antlr/Token.hpp

#ifndef INC_Token_hpp__
#define INC_Token_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/Token.hpp#2 $
 */

#include <antlr/config.hpp>
#include <antlr/TokenRefCount.hpp>
#include <string>

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif

struct TokenRef;

/** A token is minimally a token type.  Subclasses can add the text matched
 *  for the token and line info.
 */
class ANTLR_API Token
{
public:
        // constants
#ifndef NO_STATIC_CONSTS
        static const int MIN_USER_TYPE = 4;
        static const int NULL_TREE_LOOKAHEAD = 3;
        static const int INVALID_TYPE = 0;
        static const int EOF_TYPE = 1;
        static const int SKIP = -1;
#else
        enum {
                MIN_USER_TYPE = 4,
                NULL_TREE_LOOKAHEAD = 3,
                INVALID_TYPE = 0,
                EOF_TYPE = 1,
                SKIP = -1
        };
#endif

        Token()
        : ref(0)
        , type(INVALID_TYPE)
        {
        }
        Token(int t)
        : ref(0)
        , type(t)
        {
        }
        Token(int t, const ANTLR_USE_NAMESPACE(std)string& txt)
        : ref(0)
        , type(t)
        {
                setText(txt);
        }
        virtual ~Token()
        {
        }

        virtual int getColumn() const;
        virtual int getLine() const;
        virtual ANTLR_USE_NAMESPACE(std)string getText() const;
        virtual const ANTLR_USE_NAMESPACE(std)string& getFilename() const;
        virtual int getType() const;

        virtual void setColumn(int c);

        virtual void setLine(int l);
        virtual void setText(const ANTLR_USE_NAMESPACE(std)string& t);
        virtual void setType(int t);

        virtual void setFilename( const std::string& file );

        virtual ANTLR_USE_NAMESPACE(std)string toString() const;

private:
        friend struct TokenRef;
        TokenRef* ref;

        int type;                                                       ///< the type of the token

        Token(RefToken other);
        Token& operator=(const Token& other);
        Token& operator=(RefToken other);

        Token(const Token&);
};

extern ANTLR_API RefToken nullToken;

#ifdef NEEDS_OPERATOR_LESS_THAN
// RK: Added after 2.7.2 previously it was undefined.
// AL: what to return if l and/or r point to nullToken???
inline bool operator<( RefToken l, RefToken r )
{
        return nullToken == l ? ( nullToken == r ? false : true ) : l->getType() < r->getType();
}
#endif

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif

#endif //INC_Token_hpp__