PSkipper.hpp

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/***************************************************************************
 
  PSkipper.hpp
 
  Author: Andreas Suter
  e-mail: andreas.suter@psi.ch
 
  Based on Joel de Guzman example on a mini_c,
  see https://github.com/boostorg/spirit
 
***************************************************************************/
 
/***************************************************************************
 *   Copyright (C) 2023 by Andreas Suter                                   *
 *   andreas.suter@psi.ch                                                  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
 
#ifndef _PSKIPPER_HPP_
#define _PSKIPPER_HPP_
 
#include <boost/spirit/home/x3.hpp>
 
namespace mupp { namespace parser
{
    namespace x3 = boost::spirit::x3;
    namespace ascii = boost::spirit::x3::ascii;


 
    using x3::char_;
    using x3::lit;
    using x3::eol;
    using ascii::space;
    using ascii::print;
 
    inline auto const single_line_comment = (lit('%') | lit('#') | lit("//")) >> *print >> eol;
 
    inline auto const skipper =
            space                               // tab/space/cr/lf
        |   "/*" >> *(char_ - "*/") >> "*/"     // C-style comments
        |   single_line_comment
        ;
}}
 
#endif // _PSKIPPER_HPP_