Initial move from Spirit CVS

[SVN r34896]

include/boost/fusion/sequence/conversion/detail/build_cons.hpp

@@ -0,0 +1,58 @@
+/*=============================================================================
+    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_BUILD_CONS_09232005_1222)
+#define FUSION_BUILD_CONS_09232005_1222
+
+#include <boost/fusion/sequence/container/list/cons.hpp>
+#include <boost/fusion/iterator/equal_to.hpp>
+#include <boost/fusion/iterator/next.hpp>
+#include <boost/fusion/iterator/value_of.hpp>
+#include <boost/fusion/iterator/deref.hpp>
+
+namespace boost { namespace fusion { namespace detail
+{
+    template <
+        typename First
+      , typename Last
+      , bool is_empty = result_of::equal_to<First, Last>::value>
+    struct build_cons;
+
+    template <typename First, typename Last>
+    struct build_cons<First, Last, true>
+    {
+        typedef nil type;
+        
+        static nil
+        call(First const&, Last const&)
+        {
+            return nil();
+        }
+    };
+
+    template <typename First, typename Last>
+    struct build_cons<First, Last, false>
+    {
+        typedef  
+            build_cons<typename result_of::next<First>::type, Last>
+        next_build_cons;
+
+        typedef cons<
+            typename result_of::value_of<First>::type
+          , typename next_build_cons::type> 
+        type;
+
+        static type
+        call(First const& f, Last const& l)
+        {
+            return type(*f, next_build_cons::call(fusion::next(f), l));
+        }
+    };
+
+}}}
+
+#endif