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Diffstat (limited to 'boost/fusion/sequence/io/detail/out.hpp')
-rw-r--r-- | boost/fusion/sequence/io/detail/out.hpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/boost/fusion/sequence/io/detail/out.hpp b/boost/fusion/sequence/io/detail/out.hpp new file mode 100644 index 0000000000..52caf00d7d --- /dev/null +++ b/boost/fusion/sequence/io/detail/out.hpp @@ -0,0 +1,85 @@ +/*============================================================================= + Copyright (c) 1999-2003 Jaakko Jarvi + Copyright (c) 1999-2003 Jeremiah Willcock + Copyright (c) 2001-2011 Joel de Guzman + + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +==============================================================================*/ +#if !defined(FUSION_OUT_05052005_0121) +#define FUSION_OUT_05052005_0121 + +#include <ostream> +#include <boost/fusion/sequence/io/detail/manip.hpp> + +#include <boost/mpl/bool.hpp> +#include <boost/fusion/sequence/intrinsic/begin.hpp> +#include <boost/fusion/sequence/intrinsic/end.hpp> +#include <boost/fusion/iterator/deref.hpp> +#include <boost/fusion/iterator/next.hpp> +#include <boost/fusion/iterator/equal_to.hpp> + +namespace boost { namespace fusion { namespace detail +{ + template <typename Tag> + struct delimiter_out + { + // print a delimiter + template <typename OS> + static void + print(OS& os, char const* delim, mpl::false_ = mpl::false_()) + { + detail::string_ios_manip<Tag, OS> manip(os); + manip.print(delim); + } + + template <typename OS> + static void + print(OS&, char const*, mpl::true_) + { + } + }; + + struct print_sequence_loop + { + template <typename OS, typename First, typename Last> + static void + call(OS&, First const&, Last const&, mpl::true_) + { + } + + template <typename OS, typename First, typename Last> + static void + call(OS& os, First const& first, Last const& last, mpl::false_) + { + result_of::equal_to< + typename result_of::next<First>::type + , Last + > + is_last; + + os << *first; + delimiter_out<tuple_delimiter_tag>::print(os, " ", is_last); + call(os, fusion::next(first), last, is_last); + } + + template <typename OS, typename First, typename Last> + static void + call(OS& os, First const& first, Last const& last) + { + result_of::equal_to<First, Last> eq; + call(os, first, last, eq); + } + }; + + template <typename OS, typename Sequence> + inline void + print_sequence(OS& os, Sequence const& seq) + { + delimiter_out<tuple_open_tag>::print(os, "("); + print_sequence_loop::call(os, fusion::begin(seq), fusion::end(seq)); + delimiter_out<tuple_close_tag>::print(os, ")"); + } +}}} + +#endif |