From 350c0e59b1ceb60fe85977ab800c04a4b7109263 Mon Sep 17 00:00:00 2001
From: Edward Diener <eldiener@tropicsoft.com>
Date: Wed, 27 May 2015 19:15:45 -0400
Subject: [PATCH] Add ned macro

---
 .../preprocessor/seq/detail/is_empty.hpp      | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 include/boost/preprocessor/seq/detail/is_empty.hpp

diff --git a/include/boost/preprocessor/seq/detail/is_empty.hpp b/include/boost/preprocessor/seq/detail/is_empty.hpp
new file mode 100644
index 0000000..864b7f3
--- /dev/null
+++ b/include/boost/preprocessor/seq/detail/is_empty.hpp
@@ -0,0 +1,35 @@
+# /* **************************************************************************
+#  *                                                                          *
+#  *     (C) Copyright Edward Diener 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 for most recent version. */
+#
+# ifndef BOOST_PREPROCESSOR_SEQ_DETAIL_IS_EMPTY_HPP
+# define BOOST_PREPROCESSOR_SEQ_DETAIL_IS_EMPTY_HPP
+#
+# include <boost/preprocessor/config/config.hpp>
+# include <boost/preprocessor/arithmetic/dec.hpp>
+# include <boost/preprocessor/logical/bool.hpp>
+# include <boost/preprocessor/logical/compl.hpp>
+#
+/* A empty is one that is just BOOST_PP_SEQ_NIL,
+   but for out purposes here it is a seq which
+   does not start with a unary, ie '(anything)' */
+#
+# define BOOST_PP_SEQ_DETAIL_IS_EMPTY(seq) \
+	BOOST_PP_COMPL \
+		( \
+		BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq) \
+		) \
+/**/
+#
+# define BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY(seq) \
+	BOOST_PP_BOOL(BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq (nil)))) \
+/**/
+#
+# endif