src/antlr/ParserSharedInputState.hpp

#ifndef INC_ParserSharedInputState_hpp__
#define INC_ParserSharedInputState_hpp__

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/license.html
 *
 * $Id: ParserSharedInputState.hpp,v 1.1 2005-12-02 15:38:02 tim Exp $
 */

#include <antlr/config.hpp>
#include <antlr/TokenBuffer.hpp>
#include <antlr/RefCount.hpp>
#include <string>

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif

/** This object contains the data associated with an
 * input stream of tokens.  Multiple parsers
 * share a single ParserSharedInputState to parse
 * the same stream of tokens.
 */
class ANTLR_API ParserInputState {
public:
        /** Construct a new ParserInputState
         * @param in the TokenBuffer to read from. The object is deleted together
         * with the ParserInputState object.
         */
        ParserInputState( TokenBuffer* in )
        : guessing(0)
        , filename()
        , input(in)
        , inputResponsible(true)
        {
        }
        /** Construct a new ParserInputState
         * @param in the TokenBuffer to read from.
         */
        ParserInputState( TokenBuffer& in )
        : guessing(0)
        , filename("")
        , input(&in)
        , inputResponsible(false)
        {
        }

        virtual ~ParserInputState()
        {
                if (inputResponsible)
                        delete input;
        }

        TokenBuffer& getInput( void )
        {
                return *input;
        }

        /// Reset the ParserInputState and the underlying TokenBuffer
        void reset( void )
        {
                input->reset();
                guessing = 0;
        }

public:
        /** Are we guessing (guessing>0)? */
        int guessing;
        /** What file (if known) caused the problem?
         * @todo wrap this one..
         */
        ANTLR_USE_NAMESPACE(std)string filename;
private:
        /** Where to get token objects */
        TokenBuffer* input;
        /// Do we need to free the TokenBuffer or is it owned by another..
        bool inputResponsible;

        // we don't want these:
        ParserInputState(const ParserInputState&);
        ParserInputState& operator=(const ParserInputState&);
};

/// A reference counted ParserInputState
typedef RefCount<ParserInputState> ParserSharedInputState;

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif

#endif //INC_ParserSharedInputState_hpp__
Revision:	770
Committed:	Fri Dec 2 15:38:03 2005 UTC (19 years, 5 months ago) by tim
File size:	2079 byte(s)
Log Message:	End of the Link --> List Return of the Oject-Oriented replace yacc/lex parser with antlr parser
#	User	Rev	Content
1	tim	770	#ifndef INC_ParserSharedInputState_hpp__
2			#define INC_ParserSharedInputState_hpp__
3
4			/* ANTLR Translator Generator
5			* Project led by Terence Parr at http://www.jGuru.com
6			* Software rights: http://www.antlr.org/license.html
7			*
8			* $Id: ParserSharedInputState.hpp,v 1.1 2005-12-02 15:38:02 tim Exp $
9			*/
10
11			#include <antlr/config.hpp>
12			#include <antlr/TokenBuffer.hpp>
13			#include <antlr/RefCount.hpp>
14			#include <string>
15
16			#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
17			namespace antlr {
18			#endif
19
20			/** This object contains the data associated with an
21			* input stream of tokens. Multiple parsers
22			* share a single ParserSharedInputState to parse
23			* the same stream of tokens.
24			*/
25			class ANTLR_API ParserInputState {
26			public:
27			/** Construct a new ParserInputState
28			* @param in the TokenBuffer to read from. The object is deleted together
29			* with the ParserInputState object.
30			*/
31			ParserInputState( TokenBuffer* in )
32			: guessing(0)
33			, filename()
34			, input(in)
35			, inputResponsible(true)
36			{
37			}
38			/** Construct a new ParserInputState
39			* @param in the TokenBuffer to read from.
40			*/
41			ParserInputState( TokenBuffer& in )
42			: guessing(0)
43			, filename("")
44			, input(&in)
45			, inputResponsible(false)
46			{
47			}
48
49			virtual ~ParserInputState()
50			{
51			if (inputResponsible)
52			delete input;
53			}
54
55			TokenBuffer& getInput( void )
56			{
57			return *input;
58			}
59
60			/// Reset the ParserInputState and the underlying TokenBuffer
61			void reset( void )
62			{
63			input->reset();
64			guessing = 0;
65			}
66
67			public:
68			/** Are we guessing (guessing>0)? */
69			int guessing;
70			/** What file (if known) caused the problem?
71			* @todo wrap this one..
72			*/
73			ANTLR_USE_NAMESPACE(std)string filename;
74			private:
75			/** Where to get token objects */
76			TokenBuffer* input;
77			/// Do we need to free the TokenBuffer or is it owned by another..
78			bool inputResponsible;
79
80			// we don't want these:
81			ParserInputState(const ParserInputState&);
82			ParserInputState& operator=(const ParserInputState&);
83			};
84
85			/// A reference counted ParserInputState
86			typedef RefCount<ParserInputState> ParserSharedInputState;
87
88			#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
89			}
90			#endif
91
92			#endif //INC_ParserSharedInputState_hpp__