multiple_polylog.h

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/*
 *  Copyright (C) 2001-2017 Stefan Weinzierl
 *
 *  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 __NESTEDSUMS_MULTIPLE_POLYLOG_H__
#define __NESTEDSUMS_MULTIPLE_POLYLOG_H__
 
#include "ginac/ginac.h"
 
namespace nestedsums {
 
 
  class multiple_polylog : public virtual Zsum
    {
      GINAC_DECLARE_REGISTERED_CLASS(multiple_polylog, Zsum)
 
        // ctors
    public:
      explicit multiple_polylog(const GiNaC::ex & llc);
 
        // functions overriding virtual functions from bases classes
    public:
      void archive(GiNaC::archive_node &node) const override;
      void read_archive(const GiNaC::archive_node &node, GiNaC::lst &sym_lst) override;
 
      void print(const GiNaC::print_context & c, unsigned level = 0) const override;
      GiNaC::ex eval() const override;
 
      // new virtual functions
    public:
      virtual GiNaC::ex eval_approx() const;
    };
 
GINAC_DECLARE_UNARCHIVER(multiple_polylog);
 
inline GiNaC::ex create_multiple_polylog(const GiNaC::ex & llc)
  {
    return (new multiple_polylog(llc))->setflag(GiNaC::status_flags::dynallocated);
  }
 
 GiNaC::ex eval_multiple_polylog_approx(const GiNaC::ex & expr);
 
} // namespace nestedsums
 
namespace GiNaC {
 
  // template specialization
template<> inline const nestedsums::multiple_polylog &ex_to<nestedsums::multiple_polylog>(const ex &e)
  {
    return dynamic_cast<const nestedsums::multiple_polylog &>(*e.bp);
  }
 
} // end namespace GiNaC
 
#endif // ndef __NESTEDSUMS_MULTIPLE_POLYLOG_H__