Squashed 'third_party/boostorg/preprocessor/' content from commit 56090c5

Change-Id: I8c0a13225778c3751a35945439d5304bd9e639ef
git-subtree-dir: third_party/boostorg/preprocessor
git-subtree-split: 56090c56b5c78418b6dbe8c3c2ba576395152f83
diff --git a/include/boost/preprocessor/slot/counter.hpp b/include/boost/preprocessor/slot/counter.hpp
new file mode 100644
index 0000000..d257a64
--- /dev/null
+++ b/include/boost/preprocessor/slot/counter.hpp
@@ -0,0 +1,25 @@
+# /* **************************************************************************
+#  *                                                                          *
+#  *     (C) Copyright Paul Mensonides 2005.                                  *
+#  *     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 for most recent version. */
+#
+# ifndef BOOST_PREPROCESSOR_SLOT_COUNTER_HPP
+# define BOOST_PREPROCESSOR_SLOT_COUNTER_HPP
+#
+# include <boost/preprocessor/slot/detail/def.hpp>
+#
+# /* BOOST_PP_COUNTER */
+#
+# define BOOST_PP_COUNTER 0
+#
+# /* BOOST_PP_UPDATE_COUNTER */
+#
+# define BOOST_PP_UPDATE_COUNTER() <boost/preprocessor/slot/detail/counter.hpp>
+#
+# endif