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adding struct associative adaptor

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[SVN r37638]
This commit is contained in:
Dan Marsden
2007-05-08 22:14:58 +00:00
parent 8b2e69c764
commit f8bb69dc9a
5 changed files with 251 additions and 0 deletions
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54
include/boost/fusion/sequence/adapted/struct/detail/at_key_impl.hpp Normal file
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/*=============================================================================
Copyright (c) 2001-2007 Joel de Guzman
Copyright (c) 2005-2007 Dan Marsden
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)
==============================================================================*/
#if !defined(BOOST_FUSION_AT_KEY_IMPL_20070508_2248)
#define BOOST_FUSION_AT_KEY_IMPL_20070508_2248
#include <boost/fusion/support/detail/access.hpp>
namespace boost { namespace fusion
{
struct struct_tag;
namespace extension
{
template<typename T>
struct at_key_impl;
template <typename Struct, typename Key>
struct struct_assoc_member;
template <>
struct at_key_impl<struct_tag>
{
template <typename Sequence, typename Key>
struct apply
{
typedef typename
extension::struct_assoc_member<Sequence, Key>
element;
typedef typename
mpl::eval_if<
is_const<Sequence>
, detail::cref_result<element>
, detail::ref_result<element>
>::type
type;
static type
call(Sequence& seq)
{
return extension::
struct_assoc_member<Sequence, Key>::call(seq);
}
};
};
}
}}
#endif

40
include/boost/fusion/sequence/adapted/struct/detail/has_key_impl.hpp Normal file
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/*=============================================================================
Copyright (c) 2001-2007 Joel de Guzman
Copyright (c) 2005-2007 Dan Marsden
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)
==============================================================================*/
#if !defined(BOOST_FUSION_HAS_KEY_IMPL_20070508_2231)
#define BOOST_FUSION_HAS_KEY_IMPL_20070508_2231
#include <boost/type_traits/is_same.hpp>
#include <boost/mpl/not.hpp>
namespace boost { namespace fusion {
struct struct_tag;
namespace extension
{
struct no_such_member;
template<typename T>
struct has_key_impl;
template<typename Struct, typename Key>
struct struct_assoc_member;
template<>
struct has_key_impl<struct_tag>
{
template<typename Sequence, typename Key>
struct apply
: mpl::not_<is_same<no_such_member, typename struct_assoc_member<Sequence, Key>::type> >
{
};
};
}
}}
#endif

39
include/boost/fusion/sequence/adapted/struct/detail/value_at_key_impl.hpp Normal file
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/*=============================================================================
Copyright (c) 2001-2007 Joel de Guzman
Copyright (c) 2005-2007 Dan Marsden
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)
==============================================================================*/
#if !defined(BOOST_FUSION_VALUE_AT_KEY_IMPL_20070508_2300)
#define BOOST_FUSION_VALUE_AT_KEY_IMPL_20070508_2300
#include <boost/mpl/if.hpp>
namespace boost { namespace fusion
{
struct struct_tag;
namespace extension
{
template<typename T>
struct value_at_key_impl;
template <typename Struct, typename Key>
struct struct_assoc_member;
template <>
struct value_at_key_impl<struct_tag>
{
template <typename Sequence, typename Key>
struct apply
{
typedef typename
extension::struct_assoc_member<Sequence, Key>::type
type;
};
};
}
}}
#endif