Specializing insert_range for aux::set_tag as well

Follows the same rationale as for maps.

include/boost/mpl/set/aux_/insert_range_impl.hpp

@@ -0,0 +1,41 @@
+
+#ifndef BOOST_MPL_SET_AUX_INSERT_RANGE_IMPL_HPP_INCLUDED
+#define BOOST_MPL_SET_AUX_INSERT_RANGE_IMPL_HPP_INCLUDED
+
+// Copyright Bruno Dutra 2015
+//
+// 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)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Id$
+// $Date$
+// $Revision$
+
+#include <boost/mpl/insert_range_fwd.hpp>
+#include <boost/mpl/set/aux_/tag.hpp>
+#include <boost/mpl/placeholders.hpp>
+#include <boost/mpl/fold.hpp>
+#include <boost/mpl/insert.hpp>
+
+namespace boost { namespace mpl {
+
+template<>
+struct insert_range_impl< aux::set_tag >
+{
+    template<
+          typename Sequence
+        , typename /*Pos*/
+        , typename Range
+        >
+    struct apply
+        : fold<Range, Sequence, insert<_1, _2> >
+    {
+    };
+};
+
+}}
+
+#endif // BOOST_MPL_SET_AUX_INSERT_RANGE_IMPL_HPP_INCLUDED

include/boost/mpl/set/set0.hpp

@@ -21,6 +21,7 @@
 #include <boost/mpl/set/aux_/size_impl.hpp>
 #include <boost/mpl/set/aux_/empty_impl.hpp>
 #include <boost/mpl/set/aux_/insert_impl.hpp>
+#include <boost/mpl/set/aux_/insert_range_impl.hpp>
 #include <boost/mpl/set/aux_/erase_impl.hpp>
 #include <boost/mpl/set/aux_/erase_key_impl.hpp>
 #include <boost/mpl/set/aux_/has_key_impl.hpp>