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73 lines
2.4 KiB
73 lines
2.4 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2011 Eric Niebler
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Distributed under the Boost 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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==============================================================================*/
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#if !defined(BOOST_FUSION_SINGLE_VIEW_05052005_0335)
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#define BOOST_FUSION_SINGLE_VIEW_05052005_0335
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/support/detail/access.hpp>
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#include <boost/fusion/support/detail/as_fusion_element.hpp>
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#include <boost/fusion/support/sequence_base.hpp>
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#include <boost/fusion/view/single_view/single_view_iterator.hpp>
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#include <boost/fusion/view/single_view/detail/at_impl.hpp>
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#include <boost/fusion/view/single_view/detail/begin_impl.hpp>
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#include <boost/fusion/view/single_view/detail/end_impl.hpp>
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#include <boost/fusion/view/single_view/detail/size_impl.hpp>
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#include <boost/fusion/view/single_view/detail/value_at_impl.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/int.hpp>
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#include <boost/config.hpp>
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#if defined (BOOST_MSVC)
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# pragma warning(push)
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# pragma warning (disable: 4512) // assignment operator could not be generated.
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#endif
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namespace boost { namespace fusion
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{
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struct single_view_tag;
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struct random_access_traversal_tag;
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struct fusion_sequence_tag;
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template <typename T>
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struct single_view : sequence_base<single_view<T> >
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{
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typedef single_view_tag fusion_tag;
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typedef fusion_sequence_tag tag; // this gets picked up by MPL
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typedef random_access_traversal_tag category;
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typedef mpl::true_ is_view;
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typedef mpl::int_<1> size;
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typedef T value_type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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single_view()
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: val() {}
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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explicit single_view(typename detail::call_param<T>::type in_val)
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: val(in_val) {}
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value_type val;
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};
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template <typename T>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline single_view<typename detail::as_fusion_element<T>::type>
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make_single_view(T const& v)
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{
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return single_view<typename detail::as_fusion_element<T>::type>(v);
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}
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}}
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#if defined (BOOST_MSVC)
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# pragma warning(pop)
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#endif
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#endif
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