/* Copyright (c) 1997-2010
   Ewgenij Gawrilow, Michael Joswig (Technische Universitaet Darmstadt, Germany)
   http://www.polymake.de

   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, or (at your option) any
   later version: http://www.gnu.org/licenses/gpl.txt.

   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.
--------------------------------------------------------------------------------
   $Project: polymake $$Id: GenericStruct.h 9991 2010-12-12 23:36:28Z gawrilow $
*/

#ifndef POLYMAKE_CORE_WRAPPERS_GenericStruct_H
#define POLYMAKE_CORE_WRAPPERS_GenericStruct_H

#include_next "polymake/GenericStruct.h"
#include "polymake/client.h"

namespace pm { namespace perl {

template <typename Struct, int i>
struct StructUtils_helper {
   typedef typename Struct::field_types type_list;
   static const int next= i+1 < list_length<type_list>::value ? i+1 : i;
   typedef StructUtils_helper<Struct,next> recurse_down;

   static void gather_fields(ArrayHolder& arr)
   {
      size_t nl;
      const char *n=Struct::get_field_name(nl,int2type<i>());
      arr.push(Scalar::const_string(n,nl));
      if (next>i) recurse_down::gather_fields(arr);
   }
};

template <typename Struct>
struct StructUtils {
   typedef typename Struct::field_types type_list;

   static SV* field_names()
   {
      ArrayHolder ret(list_length<type_list>::value);
      StructUtils_helper<Struct,0>::gather_fields(ret);
      return ret.get();
   }
};

template <typename Struct, size_t pkgl, bool exact_match>
SV* get_Struct_type(const char (&pkg)[pkgl], bool2type<exact_match>)
{
   Stack stack(true, 1+TypeListUtils<typename Struct::field_types>::type_cnt);
   if (TypeListUtils<typename Struct::field_types>::push_types(stack)) {
      return get_parameterized_type(pkg, pkgl-1, exact_match);
   } else {
      stack.cancel();
      return NULL;
   }
}

} }

namespace polymake { namespace perl_bindings {

template <typename T, typename Struct>
recognized<pm::identical<T, Struct>::value>* recognize(SV** proto_p, bait*, T*, GenericStruct<Struct>*)
{
   *proto_p=pm::perl::get_Struct_type<Struct>("Polymake::common::Tuple", pm::identical<T, Struct>());
   return (recognized<pm::identical<T, Struct>::value>*)0;                                         \
}

template <typename Struct>
SV* field_names(bait*, GenericStruct<Struct>*)
{
   return pm::perl::StructUtils<Struct>::field_names();
}

///==== Automatically generated contents follow.    Please do not delete this line. ====
///==== Automatically generated contents end here.  Please do not delete this line. ====
} }

#endif // POLYMAKE_CORE_WRAPPERS_GenericStruct_H

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