optional/detail/optional_factory_support.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 //  akrzemi1@gmail.com
0013
0014 #ifndef BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_FACTORY_SUPPORT_AJK_12FEB2016_HPP
0015 #define BOOST_OPTIONAL_OPTIONAL_DETAIL_OPTIONAL_FACTORY_SUPPORT_AJK_12FEB2016_HPP
0016
0017 // Daniel Wallin discovered that bind/apply.hpp badly interacts with the apply<>
0018 // member template of a factory as used in the optional<> implementation.
0019 // He proposed this simple fix which is to move the call to apply<> outside
0020 // namespace boost.
0021 namespace boost_optional_detail
0022 {
0023   template <class T, class Factory>
0024   inline void construct(Factory const& factory, void* address)
0025   {
0026     factory.BOOST_NESTED_TEMPLATE apply<T>(address);
0027   }
0028 }
0029
0030 namespace boost
0031 {
0032   class in_place_factory_base ;
0033   class typed_in_place_factory_base ;
0034 }
0035
0036 #endif // header guard