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Fusion: updates

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[SVN r74566]
This commit is contained in:
Christopher Schmidt
2011-09-25 17:36:13 +00:00
parent 159426b8af
commit b7fb20e69a
2 changed files with 12 additions and 3 deletions
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12
include/boost/fusion/support/tag_of.hpp
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@ -50,11 +50,17 @@ namespace boost { namespace fusion
namespace traits
{
template <typename Sequence, typename Active>
struct tag_of_fallback
{
typedef non_fusion_tag type;
};
template <typename Sequence, typename Active>
struct tag_of
: mpl::if_< fusion::detail::is_mpl_sequence<Sequence>,
mpl::identity<mpl_sequence_tag>,
mpl::identity<non_fusion_tag> >::type
: mpl::eval_if< fusion::detail::is_mpl_sequence<Sequence>,
mpl::identity<mpl::identity<mpl_sequence_tag> >,
tag_of_fallback<Sequence> >::type
{};
template <typename Sequence>

3
include/boost/fusion/support/tag_of_fwd.hpp
View File

@ -12,6 +12,9 @@ namespace boost { namespace fusion
{
namespace traits
{
template <typename Sequence, typename Active = void>
struct tag_of_fallback;
template<typename T, typename Active = void>
struct tag_of;
}