| 1 | /*============================================================================= |
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| 2 | Copyright (c) 2016 Paul Fultz II |
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| 3 | using.hpp |
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| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
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| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | ==============================================================================*/ |
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| 7 | |
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| 8 | #ifndef BOOST_HOF_GUARD_USING_HPP |
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| 9 | #define BOOST_HOF_GUARD_USING_HPP |
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| 10 | |
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| 11 | #include <boost/hof/config.hpp> |
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| 12 | |
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| 13 | #if BOOST_HOF_HAS_TEMPLATE_ALIAS |
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| 14 | #define BOOST_HOF_USING(name, ...) using name = __VA_ARGS__ |
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| 15 | #define BOOST_HOF_USING_TYPENAME(name, ...) using name = typename __VA_ARGS__ |
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| 16 | #else |
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| 17 | #define BOOST_HOF_USING(name, ...) struct name : std::enable_if<true, __VA_ARGS__>::type {} |
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| 18 | #define BOOST_HOF_USING_TYPENAME(name, ...) struct name : __VA_ARGS__ {} |
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| 19 | #endif |
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| 20 | |
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| 21 | #endif |
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| 22 | |
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