New upstream version 8.1.0

thirdparty/source/boost_1_61_0/boost/mpl/advance.hpp

@@ -0,0 +1,76 @@
+
+#ifndef BOOST_MPL_ADVANCE_HPP_INCLUDED
+#define BOOST_MPL_ADVANCE_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2000-2004
+//
+// 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/advance_fwd.hpp>
+#include <boost/mpl/less.hpp>
+#include <boost/mpl/negate.hpp>
+#include <boost/mpl/long.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/tag.hpp>
+#include <boost/mpl/apply_wrap.hpp>
+#include <boost/mpl/aux_/advance_forward.hpp>
+#include <boost/mpl/aux_/advance_backward.hpp>
+#include <boost/mpl/aux_/value_wknd.hpp>
+#include <boost/mpl/aux_/na_spec.hpp>
+#include <boost/mpl/aux_/nttp_decl.hpp>
+
+namespace boost { namespace mpl {
+
+// default implementation for forward/bidirectional iterators
+template< typename Tag >
+struct advance_impl
+{
+    template< typename Iterator, typename N > struct apply
+    {
+        typedef typename less< N,long_<0> >::type backward_;
+        typedef typename if_< backward_, negate<N>, N >::type offset_;
+
+        typedef typename if_<
+              backward_
+            , aux::advance_backward< BOOST_MPL_AUX_VALUE_WKND(offset_)::value >
+            , aux::advance_forward< BOOST_MPL_AUX_VALUE_WKND(offset_)::value >
+            >::type f_;
+
+        typedef typename apply_wrap1<f_,Iterator>::type type;
+    };
+};
+
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(Iterator)
+    , typename BOOST_MPL_AUX_NA_PARAM(N)
+    >
+struct advance
+    : advance_impl< typename tag<Iterator>::type >
+        ::template apply<Iterator,N>
+{
+};
+
+template<
+      typename Iterator
+    , BOOST_MPL_AUX_NTTP_DECL(long, N)
+    >
+struct advance_c
+    : advance_impl< typename tag<Iterator>::type >
+        ::template apply<Iterator,long_<N> >
+{
+};
+
+BOOST_MPL_AUX_NA_SPEC(2, advance)
+
+}}
+
+#endif // BOOST_MPL_ADVANCE_HPP_INCLUDED