Subject: [Boost-commit] svn:boost r74566 - trunk/boost/fusion/support
From: mr.chr.schmidt_at_[hidden]
Date: 2011-09-25 13:36:13
Author: cschmidt
Date: 2011-09-25 13:36:13 EDT (Sun, 25 Sep 2011)
New Revision: 74566
URL: http://svn.boost.org/trac/boost/changeset/74566
Log:
Fusion: updates
Text files modified:
trunk/boost/fusion/support/tag_of.hpp | 12 +++++++++---
trunk/boost/fusion/support/tag_of_fwd.hpp | 3 +++
2 files changed, 12 insertions(+), 3 deletions(-)
Modified: trunk/boost/fusion/support/tag_of.hpp
==============================================================================
--- trunk/boost/fusion/support/tag_of.hpp (original)
+++ trunk/boost/fusion/support/tag_of.hpp 2011-09-25 13:36:13 EDT (Sun, 25 Sep 2011)
@@ -51,10 +51,16 @@
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>
Modified: trunk/boost/fusion/support/tag_of_fwd.hpp
==============================================================================
--- trunk/boost/fusion/support/tag_of_fwd.hpp (original)
+++ trunk/boost/fusion/support/tag_of_fwd.hpp 2011-09-25 13:36:13 EDT (Sun, 25 Sep 2011)
@@ -12,6 +12,9 @@
{
namespace traits
{
+ template <typename Sequence, typename Active = void>
+ struct tag_of_fallback;
+
template<typename T, typename Active = void>
struct tag_of;
}