From 06c18a67f8425b2e5404b2ab66668751922d3297 Mon Sep 17 00:00:00 2001
From: Edward Diener <eldiener@tropicsoft.com>
Date: Mon, 18 May 2015 16:36:06 -0400
Subject: [PATCH] Fixed replace when replacing the last element of a 256
 element sequence.

---
 include/boost/preprocessor/seq/replace.hpp | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/include/boost/preprocessor/seq/replace.hpp b/include/boost/preprocessor/seq/replace.hpp
index d6107a7..0cf6b77 100644
--- a/include/boost/preprocessor/seq/replace.hpp
+++ b/include/boost/preprocessor/seq/replace.hpp
@@ -12,18 +12,34 @@
 # ifndef BOOST_PREPROCESSOR_SEQ_REPLACE_HPP
 # define BOOST_PREPROCESSOR_SEQ_REPLACE_HPP
 #
+# include <boost/preprocessor/arithmetic/dec.hpp>
 # include <boost/preprocessor/arithmetic/inc.hpp>
 # include <boost/preprocessor/config/config.hpp>
+# include <boost/preprocessor/comparison/equal.hpp>
+# include <boost/preprocessor/control/iif.hpp>
 # include <boost/preprocessor/seq/first_n.hpp>
 # include <boost/preprocessor/seq/rest_n.hpp>
+# include <boost/preprocessor/seq/size.hpp>
 #
 # /* BOOST_PP_SEQ_REPLACE */
 #
 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
-#    define BOOST_PP_SEQ_REPLACE(seq, i, elem) BOOST_PP_SEQ_FIRST_N(i, seq) (elem) BOOST_PP_SEQ_REST_N(BOOST_PP_INC(i), seq)
+#    define BOOST_PP_SEQ_REPLACE(seq, i, elem) BOOST_PP_SEQ_FIRST_N(i, seq) (elem) BOOST_PP_SEQ_REPLACE_DETAIL_REST(seq, i)
 # else
 #    define BOOST_PP_SEQ_REPLACE(seq, i, elem) BOOST_PP_SEQ_REPLACE_I(seq, i, elem)
-#    define BOOST_PP_SEQ_REPLACE_I(seq, i, elem) BOOST_PP_SEQ_FIRST_N(i, seq) (elem) BOOST_PP_SEQ_REST_N(BOOST_PP_INC(i), seq)
+#    define BOOST_PP_SEQ_REPLACE_I(seq, i, elem) BOOST_PP_SEQ_FIRST_N(i, seq) (elem) BOOST_PP_SEQ_REPLACE_DETAIL_REST(seq, i)
 # endif
 #
+#    define BOOST_PP_SEQ_REPLACE_DETAIL_REST_EMPTY(seq, i)
+#    define BOOST_PP_SEQ_REPLACE_DETAIL_REST_VALID(seq, i) BOOST_PP_SEQ_REST_N(BOOST_PP_INC(i), seq)
+#    define BOOST_PP_SEQ_REPLACE_DETAIL_REST(seq, i) \
+		BOOST_PP_IIF \
+			( \
+			BOOST_PP_EQUAL(i,BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq))), \
+			BOOST_PP_SEQ_REPLACE_DETAIL_REST_EMPTY, \
+			BOOST_PP_SEQ_REPLACE_DETAIL_REST_VALID \
+			) \
+		(seq, i) \
+/**/
+#
 # endif