1/*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6==============================================================================*/
7#if !defined(FUSION_BUILD_CONS_09232005_1222)
8#define FUSION_BUILD_CONS_09232005_1222
9
10#include <boost/fusion/support/config.hpp>
11#include <boost/fusion/container/list/cons.hpp>
12#include <boost/fusion/iterator/equal_to.hpp>
13#include <boost/fusion/iterator/next.hpp>
14#include <boost/fusion/iterator/value_of.hpp>
15#include <boost/fusion/iterator/deref.hpp>
16
17namespace boost { namespace fusion { namespace detail
18{
19 template <
20 typename First
21 , typename Last
22 , bool is_empty = result_of::equal_to<First, Last>::value>
23 struct build_cons;
24
25 template <typename First, typename Last>
26 struct build_cons<First, Last, true>
27 {
28 typedef nil_ type;
29
30 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
31 static nil_
32 call(First const&, Last const&)
33 {
34 return nil_();
35 }
36 };
37
38 template <typename First, typename Last>
39 struct build_cons<First, Last, false>
40 {
41 typedef
42 build_cons<typename result_of::next<First>::type, Last>
43 next_build_cons;
44
45 typedef cons<
46 typename result_of::value_of<First>::type
47 , typename next_build_cons::type>
48 type;
49
50 BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
51 static type
52 call(First const& f, Last const& l)
53 {
54 typename result_of::value_of<First>::type v = *f;
55 return type(v, next_build_cons::call(fusion::next(f), l));
56 }
57 };
58
59}}}
60
61#endif
62