forked from boostorg/fusion
2114bfca6c
Note 1: Forwarding functions are specified as a C++14 constexpr since std::forward is not a constexpr within C++11. Note 2: Though I'm not sure why it doesn't compile, some declarations are specified as a C++14 constexpr or non-constexpr. Note 3: Boost.Tuple adaptation and TR1-based tuple implementations are not constexpr.
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2005, 2014 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(FUSION_NIL_04232014_0843)
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#define FUSION_NIL_04232014_0843
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/container/list/cons_fwd.hpp>
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#include <boost/fusion/support/sequence_base.hpp>
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#include <boost/mpl/int.hpp>
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#include <boost/mpl/bool.hpp>
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namespace boost { namespace fusion
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{
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struct void_;
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struct cons_tag;
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struct forward_traversal_tag;
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struct fusion_sequence_tag;
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struct nil_ : sequence_base<nil_>
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{
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typedef mpl::int_<0> size;
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typedef cons_tag fusion_tag;
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typedef fusion_sequence_tag tag; // this gets picked up by MPL
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typedef mpl::false_ is_view;
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typedef forward_traversal_tag category;
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typedef void_ car_type;
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typedef void_ cdr_type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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nil_() BOOST_NOEXCEPT {}
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template <typename Iterator>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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nil_(Iterator const& /*iter*/, mpl::true_ /*this_is_an_iterator*/) BOOST_NOEXCEPT
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{}
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template <typename Iterator>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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void assign_from_iter(Iterator const& /*iter*/) BOOST_NOEXCEPT
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{
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}
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};
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}}
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#endif
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