Initial move from Spirit CVS

[SVN r34896]

include/boost/fusion/sequence/io/detail/out.hpp

@@ -0,0 +1,86 @@
+/*=============================================================================
+    Copyright (c) 1999-2003 Jaakko J<>rvi
+    Copyright (c) 1999-2003 Jeremiah Willcock
+    Copyright (c) 2001-2006 Joel de Guzman
+
+    Use, modification and distribution is subject to 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 <iostream>
+#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& os, char const* delim, mpl::true_)
+        {
+        }
+    };
+
+    struct print_sequence_loop
+    {
+        template <typename OS, typename First, typename Last>
+        static void
+        call(OS& 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