| 1 | #ifndef BOOST_TYPE_TRAITS_IS_NONCOPYABLE_HPP_INCLUDED |
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| 2 | #define BOOST_TYPE_TRAITS_IS_NONCOPYABLE_HPP_INCLUDED |
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| 3 | |
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| 4 | // |
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| 5 | // Copyright 2018 Peter Dimov |
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| 6 | // |
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| 7 | // Distributed under the Boost Software License, Version 1.0. |
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| 8 | // See accompanying file LICENSE_1_0.txt or copy at |
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| 9 | // http://www.boost.org/LICENSE_1_0.txt |
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| 10 | // |
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| 11 | // is_noncopyable<T> returns whether T is derived from boost::noncopyable |
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| 12 | // |
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| 13 | |
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| 14 | #include <boost/type_traits/is_base_and_derived.hpp> |
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| 15 | |
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| 16 | namespace boost |
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| 17 | { |
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| 18 | |
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| 19 | #ifndef BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED |
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| 20 | #define BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED |
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| 21 | |
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| 22 | // boost::noncopyable derives from noncopyable_::base_token to enable us |
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| 23 | // to recognize it. The definition is macro-guarded so that we can replicate |
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| 24 | // it here without including boost/core/noncopyable.hpp, which is in Core. |
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| 25 | |
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| 26 | namespace noncopyable_ |
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| 27 | { |
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| 28 | struct base_token {}; |
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| 29 | } |
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| 30 | |
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| 31 | #endif // #ifndef BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED |
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| 32 | |
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| 33 | template<class T> struct is_noncopyable: is_base_and_derived<noncopyable_::base_token, T> |
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| 34 | { |
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| 35 | }; |
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| 36 | |
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| 37 | } // namespace boost |
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| 38 | |
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| 39 | #endif // #ifndef BOOST_TYPE_TRAITS_IS_NONCOPYABLE_HPP_INCLUDED |
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| 40 | |
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