92 lines
3.7 KiB
Plaintext
92 lines
3.7 KiB
Plaintext
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// Copyright David Abrahams 2006. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_ARCHIVE_DETAIL_REGISTER_ARCHIVE_DWA2006521_HPP
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# define BOOST_ARCHIVE_DETAIL_REGISTER_ARCHIVE_DWA2006521_HPP
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namespace boost { namespace archive { namespace detail {
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// No instantiate_ptr_serialization overloads generated by
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// BOOST_SERIALIZATION_REGISTER_ARCHIVE that lexically follow the call
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// will be seen *unless* they are in an associated namespace of one of
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// the arguments, so we pass one of these along to make sure this
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// namespace is considered. See temp.dep.candidate (14.6.4.2) in the
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// standard.
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struct adl_tag {};
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template <class Archive, class Serializable>
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struct ptr_serialization_support;
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// We could've just used ptr_serialization_support, above, but using
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// it with only a forward declaration causes vc6/7 to complain about a
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// missing instantiate member, even if it has one. This is just a
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// friendly layer of indirection.
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template <class Archive, class Serializable>
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struct _ptr_serialization_support
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: ptr_serialization_support<Archive,Serializable>
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{
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typedef int type;
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};
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#if defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x5130)
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template<int N>
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struct counter : counter<N-1> {};
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template<>
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struct counter<0> {};
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template<class Serializable>
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void instantiate_ptr_serialization(Serializable* s, int, adl_tag) {
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instantiate_ptr_serialization(s, counter<20>());
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}
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template<class Archive>
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struct get_counter {
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static const int value = sizeof(adjust_counter(counter<20>()));
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typedef counter<value> type;
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typedef counter<value - 1> prior;
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typedef char (&next)[value+1];
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};
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char adjust_counter(counter<0>);
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template<class Serializable>
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void instantiate_ptr_serialization(Serializable*, counter<0>) {}
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#define BOOST_SERIALIZATION_REGISTER_ARCHIVE(Archive) \
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namespace boost { namespace archive { namespace detail { \
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get_counter<Archive >::next adjust_counter(get_counter<Archive >::type);\
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template<class Serializable> \
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void instantiate_ptr_serialization(Serializable* s, \
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get_counter<Archive >::type) { \
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ptr_serialization_support<Archive, Serializable> x; \
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instantiate_ptr_serialization(s, get_counter<Archive >::prior()); \
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}\
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}}}
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#else
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// This function gets called, but its only purpose is to participate
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// in overload resolution with the functions declared by
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// BOOST_SERIALIZATION_REGISTER_ARCHIVE, below.
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template <class Serializable>
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void instantiate_ptr_serialization(Serializable*, int, adl_tag ) {}
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// The function declaration generated by this macro never actually
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// gets called, but its return type gets instantiated, and that's
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// enough to cause registration of serialization functions between
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// Archive and any exported Serializable type. See also:
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// boost/serialization/export.hpp
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# define BOOST_SERIALIZATION_REGISTER_ARCHIVE(Archive) \
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namespace boost { namespace archive { namespace detail { \
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\
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template <class Serializable> \
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typename _ptr_serialization_support<Archive, Serializable>::type \
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instantiate_ptr_serialization( Serializable*, Archive*, adl_tag ); \
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\
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}}}
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#endif
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}}} // namespace boost::archive::detail
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#endif // BOOST_ARCHIVE_DETAIL_INSTANTIATE_SERIALIZE_DWA2006521_HPP
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