| #ifndef BOOST_TYPE_TRAITS_IS_NONCOPYABLE_HPP_INCLUDED |
| #define BOOST_TYPE_TRAITS_IS_NONCOPYABLE_HPP_INCLUDED |
| |
| // |
| // Copyright 2018 Peter Dimov |
| // |
| // Distributed under 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 |
| // |
| // is_noncopyable<T> returns whether T is derived from boost::noncopyable |
| // |
| |
| #include <boost/type_traits/is_base_and_derived.hpp> |
| |
| namespace boost |
| { |
| |
| #ifndef BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED |
| #define BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED |
| |
| // boost::noncopyable derives from noncopyable_::base_token to enable us |
| // to recognize it. The definition is macro-guarded so that we can replicate |
| // it here without including boost/core/noncopyable.hpp, which is in Core. |
| |
| namespace noncopyable_ |
| { |
| struct base_token {}; |
| } |
| |
| #endif // #ifndef BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED |
| |
| template<class T> struct is_noncopyable: is_base_and_derived<noncopyable_::base_token, T> |
| { |
| }; |
| |
| } // namespace boost |
| |
| #endif // #ifndef BOOST_TYPE_TRAITS_IS_NONCOPYABLE_HPP_INCLUDED |
