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boost::none implementation fixed for bcc <= 5.6.4

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[SVN r37301]
This commit is contained in:
Fernando Cacciola
2007-03-27 16:02:57 +00:00
parent 7287f2bf11
commit 789cb2b24f
1 changed files with 14 additions and 1 deletions
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15
include/boost/none.hpp
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@ -12,12 +12,25 @@
#ifndef BOOST_NONE_17SEP2003_HPP
#define BOOST_NONE_17SEP2003_HPP
#include <boost/detail/workaround.hpp>
namespace boost {
#if BOOST_WORKAROUND(_BORLANDC_, <= 0x564)
namespace detail { struct none_helper{}; }
typedef int detail::none_helper::*none_t ;
none_t const none = ((none_t)0) ;
#else
enum none_t {none = 0};
} // namespace boost
#endif
} // namespace boost
#endif