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62 lines
1.8 KiB
62 lines
1.8 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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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_BUILD_CONS_09232005_1222)
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#define FUSION_BUILD_CONS_09232005_1222
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/container/list/cons.hpp>
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#include <boost/fusion/iterator/equal_to.hpp>
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#include <boost/fusion/iterator/next.hpp>
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#include <boost/fusion/iterator/value_of.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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namespace boost { namespace fusion { namespace detail
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{
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template <
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typename First
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, typename Last
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, bool is_empty = result_of::equal_to<First, Last>::value>
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struct build_cons;
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template <typename First, typename Last>
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struct build_cons<First, Last, true>
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{
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typedef nil_ type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static nil_
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call(First const&, Last const&)
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{
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return nil_();
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}
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};
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template <typename First, typename Last>
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struct build_cons<First, Last, false>
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{
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typedef
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build_cons<typename result_of::next<First>::type, Last>
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next_build_cons;
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typedef cons<
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typename result_of::value_of<First>::type
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, typename next_build_cons::type>
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type;
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(First const& f, Last const& l)
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{
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typename result_of::value_of<First>::type v = *f;
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return type(v, next_build_cons::call(fusion::next(f), l));
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}
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};
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}}}
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#endif
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