/**
 * @file
 * @brief definitions of ExampleFlexLexer and example::Lexer.
 * @since 2011-05-11
 */
#ifndef LEXER_H
#define LEXER_H

// require semantic_type & location_type
#include "generated/parser.hpp"

// class ExampleFlexLexer
#ifndef __FLEX_LEXER_H
#define yyFlexLexer ExampleFlexLexer
#include <FlexLexer.h>
#undef yyFlexLexer
#endif


namespace example 
{
	class Lexer
		: private ExampleFlexLexer
	{
		int error_count;
	public:
		Lexer(std::istream *arg_yyin = 0, std::ostream *arg_yyout = 0)
				: ExampleFlexLexer(arg_yyin, arg_yyout)
				, error_count(0)
		{}

#define EXAMPLE_LEXER_LEXFUN(SCOPE)\
		example::Parser::token_type SCOPE lex(\
			example::Parser::semantic_type* yylval,\
			example::Parser::location_type* yylloc\
		)
		EXAMPLE_LEXER_LEXFUN(); // implemented in generated/lexer.cpp (YY_DECL)
#define EXAMPLE_LEXER_YY_DECL EXAMPLE_LEXER_LEXFUN(example::Lexer::)
		

		int lexerror(const example::position &pos, const std::string &msg);
		int lexerror() const { return error_count;}
	};
}


#endif