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- // Boost noncopyable.hpp header file --------------------------------------//
- // (C) Copyright Beman Dawes 1999-2003. 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)
- // See http://www.boost.org/libs/utility for documentation.
- #ifndef BOOST_CORE_NONCOPYABLE_HPP
- #define BOOST_CORE_NONCOPYABLE_HPP
- #include <boost/config.hpp>
- namespace boost {
- // Private copy constructor and copy assignment ensure classes derived from
- // class noncopyable cannot be copied.
- // Contributed by Dave Abrahams
- namespace noncopyable_ // protection from unintended ADL
- {
- #ifndef BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED
- #define BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED
- // noncopyable derives from base_token to enable Type Traits to detect
- // whether a type derives from noncopyable without needing the definition
- // of noncopyable itself.
- //
- // The definition of base_token is macro-guarded so that Type Traits can
- // define it locally without including this header, to avoid a dependency
- // on Core.
- struct base_token {};
- #endif // #ifndef BOOST_NONCOPYABLE_BASE_TOKEN_DEFINED
- class noncopyable: base_token
- {
- protected:
- #if !defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) && !defined(BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS)
- BOOST_CONSTEXPR noncopyable() = default;
- ~noncopyable() = default;
- #else
- noncopyable() {}
- ~noncopyable() {}
- #endif
- #if !defined(BOOST_NO_CXX11_DELETED_FUNCTIONS)
- noncopyable( const noncopyable& ) = delete;
- noncopyable& operator=( const noncopyable& ) = delete;
- #else
- private: // emphasize the following members are private
- noncopyable( const noncopyable& );
- noncopyable& operator=( const noncopyable& );
- #endif
- };
- }
- typedef noncopyable_::noncopyable noncopyable;
- } // namespace boost
- #endif // BOOST_CORE_NONCOPYABLE_HPP
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