文件操作 - optional_fwd.hpp
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文件: /usr/include/boost/optional/optional_fwd.hpp
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// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal. // Copyright (C) 2016 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 // // Revisions: // 10 May 2008 (added swap related forward declaration) Niels Dekker // #ifndef BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP #define BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP #include <boost/config.hpp> namespace boost { template<class T> class optional ; // This forward is needed to refer to namespace scope swap from the member swap template<class T> void swap ( optional<T>& , optional<T>& ) ; template<class T> struct optional_swap_should_use_default_constructor ; #ifndef BOOST_OPTIONAL_CONFIG_DONT_SPECIALIZE_OPTIONAL_REFS template<class T> class optional<T&> ; template<class T> void swap ( optional<T&>& , optional<T&>& ) BOOST_NOEXCEPT; #endif } // namespace boost #endif
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