60 lines
1.8 KiB
Plaintext
60 lines
1.8 KiB
Plaintext
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/*=============================================================================
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Copyright (c) 2012-2014 Kohei Takahashi
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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_BUILD_CONS_10172012_0130)
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#define BOOST_FUSION_BUILD_CONS_10172012_0130
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#include <boost/tuple/tuple.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_tuple_cons;
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template <typename First, typename Last>
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struct build_tuple_cons<First, Last, true>
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{
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typedef boost::tuples::null_type type;
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BOOST_FUSION_GPU_ENABLED
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static type
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call(First const&, Last const&)
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{
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return type();
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}
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};
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template <typename First, typename Last>
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struct build_tuple_cons<First, Last, false>
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{
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typedef
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build_tuple_cons<typename result_of::next<First>::type, Last>
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next_build_tuple_cons;
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typedef boost::tuples::cons<
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typename result_of::value_of<First>::type
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, typename next_build_tuple_cons::type>
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type;
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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_tuple_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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