dictentry.hpp

C Preprocessor,antlr的grammar语言描述,用于学习词法分析,语法分析

/*
 * PUBLIC DOMAIN PCCTS-BASED C++ GRAMMAR (cplusplus.g, stat.g, expr.g)
 *
 * Authors: Sumana Srinivasan, NeXT Inc.;            [e-mail]
 *          Terence Parr, Parr Research Corporation; [e-mail]
 *          Russell Quong, Purdue University;        [e-mail]
 *
 * SOFTWARE RIGHTS
 *
 * This file is a part of the ANTLR-based C++ grammar and is free
 * software.  We do not reserve any LEGAL rights to its use or
 * distribution, but you may NOT claim ownership or authorship of this
 * grammar or support code.  An individual or company may otherwise do
 * whatever they wish with the grammar distributed herewith including the
 * incorporation of the grammar or the output generated by ANTLR into
 * commerical software.  You may redistribute in source or binary form
 * without payment of royalties to us as long as this header remains
 * in all source distributions.
 *
 * We encourage users to develop parsers/tools using this grammar.
 * In return, we ask that credit is given to us for developing this
 * grammar.  By "credit", we mean that if you incorporate our grammar or
 * the generated code into one of your programs (commercial product,
 * research project, or otherwise) that you acknowledge this fact in the
 * documentation, research report, etc....  In addition, you should say nice
 * things about us at every opportunity.
 *
 * As long as these guidelines are kept, we expect to continue enhancing
 * this grammar.  Feel free to send us enhancements, fixes, bug reports,
 * suggestions, or general words of encouragement at [e-mail].
 * 
 * NeXT Computer Inc.
 * 900 Chesapeake Dr.
 * Redwood City, CA 94555
 * 12/02/1994
 * 
 * Restructured for public consumption by Terence Parr late February, 1995.
 *
 * Requires PCCTS 1.32b4 or higher to get past ANTLR. 
 * 
 * DISCLAIMER: we make no guarantees that this grammar works, makes sense,
 *             or can be used to do anything useful.
 */
/* 1999-2007 Version 3.2 November 2007
 * Modified by David Wigg at London South Bank University for CPP_parser.g
 *
 * See MyReadMe.txt for further information
 *
 * This file is best viewed in courier font with tabs set to 4 spaces
 */

#ifndef DictEntry_hpp
#define DictEntry_hpp

class DictEntry 
	{
protected:
	const char *key;
	int hashCode;
	DictEntry *next;		// next element in the bucket
	DictEntry *scope;		// next element in the scope
public:
	int this_scope;			// 4/2/96 LL - added to store scope

	DictEntry()
		{ 
		key = NULL; 
		hashCode = -1; 
		next = scope = NULL;
		}
	DictEntry(const char *k, int h = -1) 
		{ 
		key = k; 
		hashCode = h; 
		next = scope = NULL;
		}
	virtual ~DictEntry()
		{ 
		key = NULL; 
		hashCode = -1; 
		next = scope = NULL;
		}

	void setKey(char *k)	{key = k;}
	const char *getKey()	{return key;}

	void setHashCode(int h)	{hashCode = h;}
	int getHashCode()		{return hashCode;}

	void setNext(DictEntry *n)	{next = n;}
	DictEntry *getNext()		{return next;}

	void setScope(DictEntry *s)	{scope = s;}
	DictEntry *getNextInScope()	{return scope;}
	};

#endif