//  tuple.hpp - Boost Tuple Library --------------------------------------

// Copyright (C) 1999, 2000 Jaakko Järvi (jaakko.jarvi@cs.utu.fi)

//

// Distributed under the Boost Software License, Version 1.0. (See

// accompanying file LICENSE_1_0.txt or copy at

// http://www.boost.org/LICENSE_1_0.txt)

// For more information, see http://www.boost.org

// ----------------------------------------------------------------- 

#ifndef BOOST_TUPLE_HPP

#define BOOST_TUPLE_HPP

#if defined(__sgi) && defined(_COMPILER_VERSION) && _COMPILER_VERSION <= 730

// Work around a compiler bug.

// boost::python::tuple has to be seen by the compiler before the

// boost::tuple class template.

namespace boost { namespace python { class tuple; }}

#endif

#include "boost/config.hpp"

#include "boost/static_assert.hpp"

#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)

// The MSVC version

#include "boost/tuple/detail/tuple_basic_no_partial_spec.hpp"

#else

// other compilers

#include "boost/ref.hpp"

#include "boost/tuple/detail/tuple_basic.hpp"

#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

namespace boost {    

using tuples::tuple;

using tuples::make_tuple;

using tuples::tie;

#if !defined(BOOST_NO_USING_TEMPLATE)

using tuples::get;

#elif !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)

//

// The "using tuples::get" statement causes the

// Borland compiler to ICE, use forwarding

// functions instead:

//

template<int N, class HT, class TT>

inline typename tuples::access_traits<

                  typename tuples::element<N, tuples::cons<HT, TT> >::type

                >::non_const_type

get(tuples::cons<HT, TT>& c) {

  return tuples::get<N,HT,TT>(c);

} 

// get function for const cons-lists, returns a const reference to

// the element. If the element is a reference, returns the reference

// as such (that is, can return a non-const reference)

template<int N, class HT, class TT>

inline typename tuples::access_traits<

                  typename tuples::element<N, tuples::cons<HT, TT> >::type

                >::const_type

get(const tuples::cons<HT, TT>& c) {

  return tuples::get<N,HT,TT>(c);

}

#else  // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

//

// MSVC, using declarations don't mix with templates well,

// so use forwarding functions instead:

//

template<int N, typename Head, typename Tail>

typename tuples::detail::element_ref<N, tuples::cons<Head, Tail> >::RET

get(tuples::cons<Head, Tail>& t, tuples::detail::workaround_holder<N>* = 0)

{

   return tuples::detail::get_class<N>::get(t);

}

template<int N, typename Head, typename Tail>

typename tuples::detail::element_const_ref<N, tuples::cons<Head, Tail> >::RET

get(const tuples::cons<Head, Tail>& t, tuples::detail::workaround_holder<N>* = 0)

{

   return tuples::detail::get_class<N>::get(t);

}

#endif // BOOST_NO_USING_TEMPLATE

} // end namespace boost

#endif // BOOST_TUPLE_HPP