// $Header: /home/daffy/u0/vern/flex/RCS/FlexLexer.h,v 1.19 96/05/25 20:43:02 vern Exp $// FlexLexer.h -- define interfaces for lexical analyzer classes generated//		  by flex// Copyright (c) 1993 The Regents of the University of California.// All rights reserved.//// This code is derived from software contributed to Berkeley by// Kent Williams and Tom Epperly.//// Redistribution and use in source and binary forms with or without// modification are permitted provided that: (1) source distributions retain// this entire copyright notice and comment, and (2) distributions including// binaries display the following acknowledgement:  ``This product includes// software developed by the University of California, Berkeley and its// contributors'' in the documentation or other materials provided with the// distribution and in all advertising materials mentioning features or use// of this software.  Neither the name of the University nor the names of// its contributors may be used to endorse or promote products derived from// this software without specific prior written permission.// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED// WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.// This file defines FlexLexer, an abstract class which specifies the// external interface provided to flex C++ lexer objects, and yyFlexLexer,// which defines a particular lexer class.//// If you want to create multiple lexer classes, you use the -P flag// to rename each yyFlexLexer to some other xxFlexLexer.  You then// include <FlexLexer.h> in your other sources once per lexer class:////	#undef yyFlexLexer//	#define yyFlexLexer xxFlexLexer//	#include <FlexLexer.h>////	#undef yyFlexLexer//	#define yyFlexLexer zzFlexLexer//	#include <FlexLexer.h>//	...#ifndef __FLEX_LEXER_H// Never included before - need to define base class.#define __FLEX_LEXER_H#include <iostream.h>extern "C++" {struct yy_buffer_state;typedef int yy_state_type;class FlexLexer {public:	virtual ~FlexLexer()	{ }	const char* YYText()	{ return yytext; }	int YYLeng()		{ return yyleng; }	virtual void		yy_switch_to_buffer( struct yy_buffer_state* new_buffer ) = 0;	virtual struct yy_buffer_state*		yy_create_buffer( istream* s, int size ) = 0;	virtual void yy_delete_buffer( struct yy_buffer_state* b ) = 0;	virtual void yyrestart( istream* s ) = 0;	virtual int yylex() = 0;	// Call yylex with new input/output sources.	int yylex( istream* new_in, ostream* new_out = 0 )		{		switch_streams( new_in, new_out );		return yylex();		}	// Switch to new input/output streams.  A nil stream pointer	// indicates "keep the current one".	virtual void switch_streams( istream* new_in = 0,					ostream* new_out = 0 ) = 0;	int lineno() const		{ return yylineno; }	int debug() const		{ return yy_flex_debug; }	void set_debug( int flag )	{ yy_flex_debug = flag; }protected:	char* yytext;	int yyleng;	int yylineno;		// only maintained if you use %option yylineno	int yy_flex_debug;	// only has effect with -d or "%option debug"};}#endif#if defined(yyFlexLexer) || ! defined(yyFlexLexerOnce)// Either this is the first time through (yyFlexLexerOnce not defined),// or this is a repeated include to define a different flavor of// yyFlexLexer, as discussed in the flex man page.#define yyFlexLexerOnceclass yyFlexLexer : public FlexLexer {public:	// arg_yyin and arg_yyout default to the cin and cout, but we	// only make that assignment when initializing in yylex().	yyFlexLexer( istream* arg_yyin = 0, ostream* arg_yyout = 0 );	virtual ~yyFlexLexer();	void yy_switch_to_buffer( struct yy_buffer_state* new_buffer );	struct yy_buffer_state* yy_create_buffer( istream* s, int size );	void yy_delete_buffer( struct yy_buffer_state* b );	void yyrestart( istream* s );	virtual int yylex();	virtual void switch_streams( istream* new_in, ostream* new_out );protected:	virtual int LexerInput( char* buf, int max_size );	virtual void LexerOutput( const char* buf, int size );	virtual void LexerError( const char* msg );	void yyunput( int c, char* buf_ptr );	int yyinput();	void yy_load_buffer_state();	void yy_init_buffer( struct yy_buffer_state* b, istream* s );	void yy_flush_buffer( struct yy_buffer_state* b );	int yy_start_stack_ptr;	int yy_start_stack_depth;	int* yy_start_stack;	void yy_push_state( int new_state );	void yy_pop_state();	int yy_top_state();	yy_state_type yy_get_previous_state();	yy_state_type yy_try_NUL_trans( yy_state_type current_state );	int yy_get_next_buffer();	istream* yyin;	// input source for default LexerInput	ostream* yyout;	// output sink for default LexerOutput	struct yy_buffer_state* yy_current_buffer;	// yy_hold_char holds the character lost when yytext is formed.	char yy_hold_char;	// Number of characters read into yy_ch_buf.	int yy_n_chars;	// Points to current character in buffer.	char* yy_c_buf_p;	int yy_init;		// whether we need to initialize	int yy_start;		// start state number	// Flag which is used to allow yywrap()'s to do buffer switches	// instead of setting up a fresh yyin.  A bit of a hack ...	int yy_did_buffer_switch_on_eof;	// The following are not always needed, but may be depending	// on use of certain flex features (like REJECT or yymore()).	yy_state_type yy_last_accepting_state;	char* yy_last_accepting_cpos;	yy_state_type* yy_state_buf;	yy_state_type* yy_state_ptr;	char* yy_full_match;	int* yy_full_state;	int yy_full_lp;	int yy_lp;	int yy_looking_for_trail_begin;	int yy_more_flag;	int yy_more_len;	int yy_more_offset;	int yy_prev_more_offset;};#endif