boost/optional/optional_fwd.hpp

0001 // Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
0002 // Copyright (C) 2016 Andrzej Krzemienski
0003 //
0004 // Use, modification, and distribution is subject to the Boost Software
0005 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0006 // http://www.boost.org/LICENSE_1_0.txt)
0007 //
0008 // See http://www.boost.org/libs/optional for documentation.
0009 //
0010 // You are welcome to contact the author at:
0011 //  fernando_cacciola@hotmail.com
0012 //
0013 // Revisions:
0014 // 10 May 2008 (added swap related forward declaration) Niels Dekker
0015 //
0016 #ifndef BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
0017 #define BOOST_OPTIONAL_OPTIONAL_FWD_FLC_19NOV2002_HPP
0018
0019 #include <boost/config.hpp>
0020
0021 namespace boost {
0022
0023 template<class T> class optional ;
0024
0025 // This forward is needed to refer to namespace scope swap from the member swap
0026 template<class T> void swap ( optional<T>& , optional<T>& ) ;
0027
0028 template<class T> struct optional_swap_should_use_default_constructor ;
0029
0030 #ifndef BOOST_OPTIONAL_CONFIG_DONT_SPECIALIZE_OPTIONAL_REFS
0031
0032 template<class T> class optional<T&> ;
0033
0034 template<class T> void swap ( optional<T&>& , optional<T&>& ) BOOST_NOEXCEPT;
0035
0036 #endif
0037
0038 } // namespace boost
0039
0040 #endif
0041