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Diffstat (limited to 'src/third_party/boost-1.60.0/boost/none_t.hpp')
| -rw-r--r-- | src/third_party/boost-1.60.0/boost/none_t.hpp | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/third_party/boost-1.60.0/boost/none_t.hpp b/src/third_party/boost-1.60.0/boost/none_t.hpp new file mode 100644 index 00000000000..608cb0c3548 --- /dev/null +++ b/src/third_party/boost-1.60.0/boost/none_t.hpp @@ -0,0 +1,40 @@ +// Copyright (C) 2003, Fernando Luis Cacciola Carballal. +// Copyright (C) 2014 Andrzej Krzemienski. +// +// Use, modification, and distribution is subject to the Boost Software +// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// +// See http://www.boost.org/libs/optional for documentation. +// +// You are welcome to contact the author at: +// fernando_cacciola@hotmail.com +// +#ifndef BOOST_NONE_T_17SEP2003_HPP +#define BOOST_NONE_T_17SEP2003_HPP + +namespace boost { + +#ifdef BOOST_OPTIONAL_USE_OLD_DEFINITION_OF_NONE + +namespace detail { struct none_helper{}; } +typedef int detail::none_helper::*none_t ; + +#elif defined BOOST_OPTIONAL_USE_SINGLETON_DEFINITION_OF_NONE + +class none_t {}; + +#else + +struct none_t +{ + struct init_tag{}; + explicit none_t(init_tag){} // to prevent default constructor +}; + +#endif // old implementation workarounds + +} // namespace boost + +#endif // header guard + |