lambda.hh

// Copyright (C) 2001, 2002, 2003, 2004  EPITA Research and Development Laboratory
//
// This file is part of the Olena Library.  This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License version 2 as published by the
// Free Software Foundation.
//
// 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 the file COPYING.  If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.
//
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// software library without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
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#ifndef OLENA_TOPO_COMBINATORIAL_MAP_INTERNAL_LAMBDA_HH
# define OLENA_TOPO_COMBINATORIAL_MAP_INTERNAL_LAMBDA_HH

# include <oln/topo/combinatorial-map/internal/anyfunc.hh>
# include <oln/topo/combinatorial-map/internal/alpha.hh>

namespace oln {

  namespace topo {

    namespace combinatorial_map {

      namespace internal {

        /* lambda function.
        **
        ** \todo FIXNE: add doc.
        */
        template <class U, class V = U>
        class lambda : public anyfunc<U, V, lambda<U, V> >
        {
        public:
          static std::string
          name()
          {
            return "lambda";
          }

          // FIXME: why these methods are public? I think we should
          // use the friend class trick like in oln/core/.

          void
          resize_(unsigned n)
          {
            f_.resize(n+1);
          }

          void
          assign_(const U & i, const V & e)
          {
            f_[i] = e;
          }

          void
          erase(const U & i)
          {
            f_[i] = 0;
            f_[alpha<U>::result(i)] = 0;
          }
        };

      } // end of namespace internal

    } // end of namespace combinatorial_map

  } // end of namespace topo

} // end of namespace oln

#endif // ! OLENA_TOPO_COMBINATORIAL_MAP_INTERNAL_LAMBDA_HH

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