55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
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#ifndef BOOST_DESCRIBE_DETAIL_BASES_HPP_INCLUDED
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#define BOOST_DESCRIBE_DETAIL_BASES_HPP_INCLUDED
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// Copyright 2020 Peter Dimov
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#include <boost/describe/detail/compute_base_modifiers.hpp>
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#include <boost/describe/detail/pp_for_each.hpp>
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#include <boost/describe/detail/list.hpp>
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#include <type_traits>
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namespace boost
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{
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namespace describe
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{
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namespace detail
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{
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// base_descriptor
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template<class C, class B> struct base_descriptor
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{
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static_assert( std::is_base_of<B, C>::value, "A type listed as a base is not one" );
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using type = B;
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static constexpr unsigned modifiers = compute_base_modifiers<C, B>();
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};
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template<class C, class B> constexpr unsigned base_descriptor<C, B>::modifiers;
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template<class... T> auto base_descriptor_fn_impl( int, T... )
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{
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return list<T...>();
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}
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#define BOOST_DESCRIBE_BASE_IMPL(C, B) , boost::describe::detail::base_descriptor<C, B>()
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#if defined(_MSC_VER) && !defined(__clang__)
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#define BOOST_DESCRIBE_BASES(C, ...) inline auto boost_base_descriptor_fn( C** ) \
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{ return boost::describe::detail::base_descriptor_fn_impl( 0 BOOST_DESCRIBE_PP_FOR_EACH(BOOST_DESCRIBE_BASE_IMPL, C, __VA_ARGS__) ); }
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#else
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#define BOOST_DESCRIBE_BASES(C, ...) inline auto boost_base_descriptor_fn( C** ) \
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{ return boost::describe::detail::base_descriptor_fn_impl( 0 BOOST_DESCRIBE_PP_FOR_EACH(BOOST_DESCRIBE_BASE_IMPL, C, ##__VA_ARGS__) ); }
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#endif
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} // namespace detail
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} // namespace describe
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} // namespace boost
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#endif // #ifndef BOOST_DESCRIBE_DETAIL_BASES_HPP_INCLUDED
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