Initial move from Spirit CVS

[SVN r34896]

include/boost/fusion/sequence/intrinsic/front.hpp

@@ -0,0 +1,42 @@
+/*=============================================================================
+    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_FRONT_09162005_0343)
+#define FUSION_FRONT_09162005_0343
+
+#include <boost/fusion/sequence/intrinsic/begin.hpp>
+#include <boost/fusion/iterator/deref.hpp>
+#include <boost/mpl/bool.hpp>
+
+namespace boost { namespace fusion
+{
+    struct fusion_sequence_tag;
+
+    namespace result_of
+    {
+        template <typename Sequence>
+        struct front
+            : result_of::deref<typename result_of::begin<Sequence>::type>
+        {};
+    }
+    
+    template <typename Sequence>
+    inline typename result_of::front<Sequence>::type
+    front(Sequence& seq)
+    {
+        return *fusion::begin(seq);
+    }
+
+    template <typename Sequence>
+    inline typename result_of::front<Sequence const>::type
+    front(Sequence const& seq)
+    {
+        return *fusion::begin(seq);
+    }
+}}
+
+#endif