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/Src/Dependencies/Boost/boost/fusion/sequence/io/detail/out.hpp

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C++ Header | 85 lines | 66 code | 10 blank | 9 comment | 0 complexity | 56a38f74f89fc80e0b52b199891848d3 MD5 | raw file
 1/*=============================================================================
 2    Copyright (c) 1999-2003 Jaakko Jarvi
 3    Copyright (c) 1999-2003 Jeremiah Willcock
 4    Copyright (c) 2001-2006 Joel de Guzman
 5
 6    Distributed under the Boost Software License, Version 1.0. (See accompanying 
 7    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 8==============================================================================*/
 9#if !defined(FUSION_OUT_05052005_0121)
10#define FUSION_OUT_05052005_0121
11
12#include <ostream>
13#include <boost/fusion/sequence/io/detail/manip.hpp>
14
15#include <boost/mpl/bool.hpp>
16#include <boost/fusion/sequence/intrinsic/begin.hpp>
17#include <boost/fusion/sequence/intrinsic/end.hpp>
18#include <boost/fusion/iterator/deref.hpp>
19#include <boost/fusion/iterator/next.hpp>
20#include <boost/fusion/iterator/equal_to.hpp>
21
22namespace boost { namespace fusion { namespace detail
23{
24    template <typename Tag>
25    struct delimiter_out
26    {
27        // print a delimiter
28        template <typename OS>
29        static void
30        print(OS& os, char const* delim, mpl::false_ = mpl::false_())
31        {
32            detail::string_ios_manip<Tag, OS> manip(os);
33            manip.print(delim);
34        }
35
36        template <typename OS>
37        static void
38        print(OS&, char const*, mpl::true_)
39        {
40        }
41    };
42
43    struct print_sequence_loop
44    {
45        template <typename OS, typename First, typename Last>
46        static void
47        call(OS&, First const&, Last const&, mpl::true_)
48        {
49        }
50
51        template <typename OS, typename First, typename Last>
52        static void
53        call(OS& os, First const& first, Last const& last, mpl::false_)
54        {
55            result_of::equal_to<
56                typename result_of::next<First>::type
57              , Last
58            >
59            is_last;
60
61            os << *first;
62            delimiter_out<tuple_delimiter_tag>::print(os, " ", is_last);
63            call(os, fusion::next(first), last, is_last);
64        }
65
66        template <typename OS, typename First, typename Last>
67        static void
68        call(OS& os, First const& first, Last const& last)
69        {
70            result_of::equal_to<First, Last> eq;
71            call(os, first, last, eq);
72        }
73    };
74
75    template <typename OS, typename Sequence>
76    inline void
77    print_sequence(OS& os, Sequence const& seq)
78    {
79        delimiter_out<tuple_open_tag>::print(os, "(");
80        print_sequence_loop::call(os, fusion::begin(seq), fusion::end(seq));
81        delimiter_out<tuple_close_tag>::print(os, ")");
82    }
83}}}
84
85#endif