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Protected unused_type by an ADL barrier

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[SVN r51654]
This commit is contained in:
Hartmut Kaiser
2009-03-09 01:17:20 +00:00
parent 08a038ad51
commit c81456f35e
1 changed files with 7 additions and 1 deletions
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8
include/boost/fusion/support/unused.hpp
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@ -15,7 +15,7 @@
#define BOOST_FUSION_UNUSED_HAS_IO
namespace boost { namespace fusion
namespace fusion_adl_barrier
{
struct unused_type
{
@ -56,6 +56,12 @@ namespace boost { namespace fusion
};
unused_type const unused = unused_type();
}
namespace boost { namespace fusion
{
using ::fusion_adl_barrier::unused_type;
using ::fusion_adl_barrier::unused;
template <typename Out>
inline Out& operator<<(Out& out, unused_type const&)