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mpl::sequence_tag specialization for adapted types

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[SVN r58396]
This commit is contained in:
Christopher Schmidt
2009-12-15 13:30:02 +00:00
parent 2587757d47
commit f0cd405f04
16 changed files with 363 additions and 110 deletions
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91
include/boost/fusion/adapted/std_pair.hpp
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@ -16,6 +16,7 @@
namespace boost { namespace fusion
{
struct struct_tag;
struct fusion_sequence_tag;
namespace traits
{
@ -29,42 +30,60 @@ namespace boost { namespace fusion
typedef struct_tag type;
};
}
namespace extension
{
template <typename Struct, int N>
struct struct_member;
template <typename Struct>
struct struct_size;
template <typename T1, typename T2>
struct struct_member<std::pair<T1, T2>, 0>
{
typedef T1 type;
static type& call(std::pair<T1, T2>& pair)
{
return pair.first;
}
};
template <typename T1, typename T2>
struct struct_member<std::pair<T1, T2>, 1>
{
typedef T2 type;
static type& call(std::pair<T1, T2>& pair)
{
return pair.second;
}
};
template <typename T1, typename T2>
struct struct_size<std::pair<T1, T2> > : mpl::int_<2>
{
};
}
}}
namespace boost { namespace mpl
{
template<typename>
struct sequence_tag;
template<typename T1, typename T2>
struct sequence_tag<std::pair<T1, T2> >
{
typedef fusion::fusion_sequence_tag type;
};
template<typename T1, typename T2>
struct sequence_tag<std::pair<T1, T2> const>
{
typedef fusion::fusion_sequence_tag type;
};
}}
namespace boost { namespace fusion { namespace extension
{
template <typename Struct, int N>
struct struct_member;
template <typename Struct>
struct struct_size;
template <typename T1, typename T2>
struct struct_member<std::pair<T1, T2>, 0>
{
typedef T1 type;
static type& call(std::pair<T1, T2>& pair)
{
return pair.first;
}
};
template <typename T1, typename T2>
struct struct_member<std::pair<T1, T2>, 1>
{
typedef T2 type;
static type& call(std::pair<T1, T2>& pair)
{
return pair.second;
}
};
template <typename T1, typename T2>
struct struct_size<std::pair<T1, T2> > : mpl::int_<2>
{
};
}}}
#endif