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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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94
include/boost/fusion/sequence/adapted/struct/adapt_assoc_struct.hpp Normal file
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/*=============================================================================
Copyright (c) 2001-2007 Joel de Guzman
Copyright (c) 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_ADAPT_ASSOC_STRUCT_20070508_2207)
#define BOOST_FUSION_ADAPT_ASSOC_STRUCT_20070508_2207
#include <boost/fusion/support/tag_of_fwd.hpp>
#include <boost/fusion/sequence/adapted/struct/extension.hpp>
#include <boost/fusion/sequence/adapted/struct/struct_iterator.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/is_view_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/is_sequence_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/category_of_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/begin_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/end_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/size_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/at_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/value_at_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/has_key_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/at_key_impl.hpp>
#include <boost/fusion/sequence/adapted/struct/detail/value_at_key_impl.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/punctuation/comma_if.hpp>
#include <boost/preprocessor/seq/for_each_i.hpp>
#include <boost/preprocessor/tuple/elem.hpp>
#include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/mpl/int.hpp>
#include <utility>
namespace boost { namespace fusion { namespace extension {
template<typename Struct, typename Key>
struct struct_assoc_member;
}}}
#define BOOST_FUSION_ADAPT_ASSOC_STRUCT(name, bseq) \
BOOST_FUSION_ADAPT_ASSOC_STRUCT_I( \
name, BOOST_PP_CAT(BOOST_FUSION_ADAPT_ASSOC_STRUCT_X bseq, 0)) \
/***/
#define BOOST_FUSION_ADAPT_ASSOC_STRUCT_X(x, y, z) ((x, y, z)) BOOST_FUSION_ADAPT_ASSOC_STRUCT_Y
#define BOOST_FUSION_ADAPT_ASSOC_STRUCT_Y(x, y, z) ((x, y, z)) BOOST_FUSION_ADAPT_ASSOC_STRUCT_X
#define BOOST_FUSION_ADAPT_ASSOC_STRUCT_X0
#define BOOST_FUSION_ADAPT_ASSOC_STRUCT_Y0
// BOOST_FUSION_ADAPT_ASSOC_STRUCT_I generates the overarching structure and uses
// SEQ_FOR_EACH_I to generate the "linear" substructures.
// Thanks to Paul Mensonides for the PP macro help
#define BOOST_FUSION_ADAPT_ASSOC_STRUCT_I(name, seq) \
namespace boost { namespace fusion { namespace traits \
{ \
template <> \
struct tag_of<name> \
{ \
typedef struct_tag type; \
}; \
}}} \
namespace boost { namespace fusion { namespace extension \
{ \
template <> \
struct struct_size<name> : mpl::int_<BOOST_PP_SEQ_SIZE(seq)> {}; \
BOOST_PP_SEQ_FOR_EACH_I(BOOST_FUSION_ADAPT_ASSOC_STRUCT_C, name, seq) \
}}} \
/***/
#define BOOST_FUSION_ADAPT_ASSOC_STRUCT_C(r, name, i, xy) \
template <> \
struct struct_member<name, i> \
{ \
typedef BOOST_PP_TUPLE_ELEM(3, 0, xy) type; \
static type& call(name& struct_) \
{ \
return struct_.BOOST_PP_TUPLE_ELEM(3, 1, xy); \
}; \
}; \
template<> \
struct struct_assoc_member<name, BOOST_PP_TUPLE_ELEM(3, 2, xy)> \
{ \
typedef BOOST_PP_TUPLE_ELEM(3, 0, xy) type; \
static type& call(name& struct_) \
{ \
return struct_.BOOST_PP_TUPLE_ELEM(3, 1, xy); \
}; \
};
/***/
#endif

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

24
include/boost/fusion/sequence/adapted/struct/extension.hpp
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@ -37,6 +37,30 @@ namespace boost { namespace fusion { namespace extension
struct struct_size<Struct const>
: struct_size<Struct>
{};
struct no_such_member;
template<typename Struct, typename Key>
struct struct_assoc_member
{
typedef no_such_member type;
};
template<typename Struct, typename Key>
struct struct_assoc_member<Struct const, Key>
{
typedef typename
add_const<typename struct_assoc_member<Struct, Key>::type>::type
type;
static type&
call(Struct const& struct_)
{
return struct_member<Struct, Key>::call(
const_cast<Struct&>(struct_));
}
};
}}}
#endif