boost/multi_index/detail/def_ctor_tuple_cons.hpp
/* Copyright 2003-2005 Joaqu�n M L�pez Mu�oz.
* 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)
*
* See http://www.boost.org/libs/multi_index for library home page.
*/
#ifndef BOOST_MULTI_INDEX_DETAIL_DEF_CTOR_TUPLE_CONS_HPP
#define BOOST_MULTI_INDEX_DETAIL_DEF_CTOR_TUPLE_CONS_HPP
#if defined(_MSC_VER)&&(_MSC_VER>=1200)
#pragma once
#endif
#include <boost/config.hpp>
#if defined(BOOST_MSVC)
/* In MSVC, tuples::cons is not default constructible. We provide a
* tiny wrapper around tuple::cons filling that hole.
*/
#include <boost/tuple/tuple.hpp>
namespace boost{
namespace multi_index{
namespace detail{
template<typename Cons>
struct default_constructible_tuple_cons:Cons
{
default_constructible_tuple_cons():
Cons(
Cons::head_type(),
static_cast<const Cons::tail_type&>(
default_constructible_tuple_cons<Cons::tail_type>()))
{}
default_constructible_tuple_cons(const Cons& cons):Cons(cons){}
};
template<>
struct default_constructible_tuple_cons<tuples::null_type>:tuples::null_type
{
default_constructible_tuple_cons(){}
default_constructible_tuple_cons(const tuples::null_type&){}
};
} /* namespace multi_index::detail */
} /* namespace multi_index */
} /* namespace boost */
#endif /* BOOST_MSVC */
#endif