/**********************************************************************
  *                                                                    *
  * Copyright (c) 2003 INFN - Sezione di Napoli                        *
  *                                                                    *
  * For more information (including a list of authors) see             *
  * the README file                                                    *
  *                                                                    *
  * This library 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 library 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 library (see file COPYING); if not, write to the   *
  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,        *
  * Boston, MA 02111-1307 USA, or contact the authors.                 *
  *                                                                    *
  **********************************************************************/
#include <iostream>
#include <fstream>
#include <sstream>
using namespace std;
#include "makeHeader.h"

struct makeHeader_Arguments : makeHeader
{
  makeHeader_Arguments( ostream& out, int n ) : makeHeader ( out ) 
  {
    copyrightNotice();
    head( "ARGUMENTS_H" );
    _out << "#include \"boost/mpl/size.hpp\"\n"
	 << "#include \"boost/mpl/list.hpp\"\n"
	 << "// boost bug? remove doesn't compile:\n"
	 << "// for_each not included (apply1<...> undefined)\n"
	 << "#include \"boost/mpl/for_each.hpp\"\n"
	 << "#include \"boost/mpl/remove.hpp\"\n\n";
    ns( "Pdf" );
    _out << "struct null_arg { };\n\n"
	 << "template<\n";
    list (  "         typename T", n, " = null_arg", ",\n" );
    _out << "\n"
	 << "        >\n"
	 << "struct Arguments\n"
	 << "{\n" 
	 << "  typedef typename boost::mpl::remove<\n"
	 << "    typename boost::mpl::list< ";
    list( "T", n );
    _out << " >::type,\n";
    _out << "    null_arg>::type types;\n";
    _out << "  enum { vars = boost::mpl::size< types >::type::value };\n";
    list2( "  typedef T", n, " arg", ";", "\n" );
    _out << "\n"
	 << "};\n\n";
    
    _out << "template<typename T>\n"
	 << "struct InheritArguments :\n"
	 << "  public Arguments<\n";
    list  ( "                   typename T::arg", n, "", ",\n" );
    _out << "\n"
	 << "                  >\n"
	 << "{\n"
	 << "  typedef T Pdf;\n"
	 << "};\n";

    foot();
  }
};

int main( int argc, char ** argv )
{
  const char * header ="Arguments.h";
  if ( argc == 2 )
  {
    cout << " generating header file " << header << endl;
    istringstream str( argv[ 1 ] );
    int n;
    str >> n;
    cout << " maximum numger of arguments for Pdf's is " << n << endl;

    ofstream file( header );

    makeHeader_Arguments mk( file, n );

    return 0;
  }
  
  cout << "usage: " << argv[ 0 ] << " <arg_max> \n"
       << "  <arg_max> : maximum number of pdf arguments" << endl;

  return 0;
}