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prelude to iterator_facade and sequence_facade

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[SVN r35316]
This commit is contained in:
Joel de Guzman
2006-09-25 08:37:16 +00:00
parent a37b435ce6
commit 654fd0918e
33 changed files with 160 additions and 128 deletions
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11
include/boost/fusion/sequence/intrinsic/value_at_key.hpp
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@ -14,6 +14,8 @@
namespace boost { namespace fusion
{
// Special tags:
struct sequence_facade_tag;
struct array_tag; // boost::array tag
struct mpl_sequence_tag; // mpl sequence tag
struct std_pair_tag; // std::pair tag
@ -23,10 +25,17 @@ namespace boost { namespace fusion
template <typename Tag>
struct value_at_key_impl
{
template <typename Sequence, typename N>
template <typename Sequence, typename Key>
struct apply;
};
template <>
struct value_at_key_impl<sequence_facade_tag>
{
template <typename Sequence, typename Key>
struct apply : Sequence::template value_at_key<Sequence, Key> {};
};
template <>
struct value_at_key_impl<array_tag>;