summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat (limited to '3rdParty/Boost/src/boost/fusion/container/list/detail/at_impl.hpp')
-rw-r--r--3rdParty/Boost/src/boost/fusion/container/list/detail/at_impl.hpp132
1 files changed, 132 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/fusion/container/list/detail/at_impl.hpp b/3rdParty/Boost/src/boost/fusion/container/list/detail/at_impl.hpp
new file mode 100644
index 0000000..7574639
--- /dev/null
+++ b/3rdParty/Boost/src/boost/fusion/container/list/detail/at_impl.hpp
@@ -0,0 +1,132 @@
+/*=============================================================================
+ Copyright (c) 2001-2011 Joel de Guzman
+
+ 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)
+==============================================================================*/
+#if !defined(FUSION_AT_IMPL_07172005_0726)
+#define FUSION_AT_IMPL_07172005_0726
+
+#include <boost/fusion/support/detail/access.hpp>
+#include <boost/type_traits/is_const.hpp>
+#include <boost/type_traits/add_const.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/bool.hpp>
+
+namespace boost { namespace fusion
+{
+ namespace detail
+ {
+ template <typename Cons>
+ struct cons_deref
+ {
+ typedef typename Cons::car_type type;
+ };
+
+ template <typename Cons, int I>
+ struct cons_advance
+ {
+ typedef typename
+ cons_advance<Cons, I-1>::type::cdr_type
+ type;
+ };
+
+ template <typename Cons>
+ struct cons_advance<Cons, 0>
+ {
+ typedef Cons type;
+ };
+
+ template <typename Cons>
+ struct cons_advance<Cons, 1>
+ {
+ typedef typename Cons::cdr_type type;
+ };
+
+ template <typename Cons>
+ struct cons_advance<Cons, 2>
+ {
+#if BOOST_WORKAROUND(BOOST_MSVC, > 1400) // VC8 and above
+ typedef typename Cons::cdr_type::cdr_type type;
+#else
+ typedef typename Cons::cdr_type _a;
+ typedef typename _a::cdr_type type;
+#endif
+ };
+
+ template <typename Cons>
+ struct cons_advance<Cons, 3>
+ {
+#if BOOST_WORKAROUND(BOOST_MSVC, > 1400) // VC8 and above
+ typedef typename Cons::cdr_type::cdr_type::cdr_type type;
+#else
+ typedef typename Cons::cdr_type _a;
+ typedef typename _a::cdr_type _b;
+ typedef typename _b::cdr_type type;
+#endif
+ };
+
+ template <typename Cons>
+ struct cons_advance<Cons, 4>
+ {
+#if BOOST_WORKAROUND(BOOST_MSVC, > 1400) // VC8 and above
+ typedef typename Cons::cdr_type::cdr_type::cdr_type::cdr_type type;
+#else
+ typedef typename Cons::cdr_type _a;
+ typedef typename _a::cdr_type _b;
+ typedef typename _b::cdr_type _c;
+ typedef typename _c::cdr_type type;
+#endif
+ };
+ }
+
+ struct cons_tag;
+
+ namespace extension
+ {
+ template <typename Tag>
+ struct at_impl;
+
+ template <>
+ struct at_impl<cons_tag>
+ {
+ template <typename Sequence, typename N>
+ struct apply
+ {
+ typedef typename detail::cons_deref<
+ typename detail::cons_advance<Sequence, N::value>::type>::type
+ element;
+
+ typedef typename
+ mpl::if_<
+ is_const<Sequence>
+ , typename detail::cref_result<element>::type
+ , typename detail::ref_result<element>::type
+ >::type
+ type;
+
+ template <typename Cons, int N2>
+ static type
+ call(Cons& s, mpl::int_<N2>)
+ {
+ return call(s.cdr, mpl::int_<N2-1>());
+ }
+
+ template <typename Cons>
+ static type
+ call(Cons& s, mpl::int_<0>)
+ {
+ return s.car;
+ }
+
+ static type
+ call(Sequence& s)
+ {
+ return call(s, mpl::int_<N::value>());
+ }
+ };
+ };
+ }
+}}
+
+#endif