/*
Copyright (C) 2009-2019 Andreas Franz Borchert
Michael Christian Lehn
----------------------------------------------------------------------------
Astl-ULMcalc is free software; you can redistribute it
and/or modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either version
2 of the License, or (at your option) any later version.
Astl-ULMcalc is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef ASTL_ULMCALC_SCANNER_HPP
#define ASTL_ULMCALC_SCANNER_HPP
#include <iostream>
#include <memory>
#include "parser.hpp"
#include "location.hpp"
namespace AstlULMcalc {
typedef parser::semantic_type semantic_type;
class Scanner {
public:
Scanner(std::istream& in, const std::string& input_name);
// mutators
int get_token(semantic_type& yylval, location& yylloc);
private:
std::istream& in;
std::string input_name;
unsigned char ch;
bool eof;
int lasttoken; // last token returned by get_token()
position oldpos, pos;
location tokenloc;
std::unique_ptr<std::string> tokenstr;
std::string processed_tokenstr; /* actual value of literals */
// private mutators
void nextch();
void error(char const* msg);
void convert_to_utf8();
};
inline int yylex(semantic_type* yylval, location* yylloc, Scanner& scanner) {
return scanner.get_token(*yylval, *yylloc);
}
} // namespace AstlULMcalc
#endif