From 4834a1927b3e6dcf2a41d28d58b2903dc7817c19 Mon Sep 17 00:00:00 2001
From: Vesa Karvonen <vesa.karvonen@housemarque.fi>
Date: Fri, 22 Feb 2002 11:03:40 +0000
Subject: [PATCH] Added BOOST_PP_FOLD_RIGHT_2ND

[SVN r12896]
---
 include/boost/preprocessor/list.hpp           |  2 +-
 .../preprocessor/list/fold_right_2nd.hpp      | 32 +++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 include/boost/preprocessor/list/fold_right_2nd.hpp

diff --git a/include/boost/preprocessor/list.hpp b/include/boost/preprocessor/list.hpp
index 8a03819..77dc79a 100644
--- a/include/boost/preprocessor/list.hpp
+++ b/include/boost/preprocessor/list.hpp
@@ -20,7 +20,7 @@
 #include <boost/preprocessor/list/cat.hpp>
 #include <boost/preprocessor/list/filter.hpp>
 #include <boost/preprocessor/list/first_n.hpp>
-#include <boost/preprocessor/list/fold_left_2nd.hpp>
+#include <boost/preprocessor/list/fold_right_2nd.hpp>
 #include <boost/preprocessor/list/for_each.hpp>
 #include <boost/preprocessor/list/for_each_product.hpp>
 #include <boost/preprocessor/list/size.hpp>
diff --git a/include/boost/preprocessor/list/fold_right_2nd.hpp b/include/boost/preprocessor/list/fold_right_2nd.hpp
new file mode 100644
index 0000000..f7b055f
--- /dev/null
+++ b/include/boost/preprocessor/list/fold_right_2nd.hpp
@@ -0,0 +1,32 @@
+#ifndef BOOST_PREPROCESSOR_LIST_FOLD_RIGHT_2ND_HPP
+#define BOOST_PREPROCESSOR_LIST_FOLD_RIGHT_2ND_HPP
+
+/* Copyright (C) 2002
+ * Housemarque Oy
+ * http://www.housemarque.com
+ *
+ * Permission to copy, use, modify, sell and distribute this software is
+ * granted provided this copyright notice appears in all copies. This
+ * software is provided "as is" without express or implied warranty, and
+ * with no claim as to its suitability for any purpose.
+ *
+ * See http://www.boost.org for most recent version.
+ */
+
+#include <boost/preprocessor/list/fold_left_2nd.hpp>
+#include <boost/preprocessor/list/reverse.hpp>
+
+/** <p>Same as BOOST_PP_LIST_FOLD_RIGHT(), but is implemented independently.</p> */
+#define BOOST_PP_LIST_FOLD_RIGHT_2ND(F,L,P) BOOST_PP_LIST_FOLD_RIGHT_2ND_D(0,F,L,P)
+
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
+#define BOOST_PP_LIST_FOLD_RIGHT_2ND_D(D,F,L,P) BOOST_PP_TUPLE_ELEM(2,1,BOOST_PP_LIST_FOLD_LEFT_2ND_D(D,BOOST_PP_LIST_FOLD_RIGHT_2ND_F,(F,P),BOOST_PP_LIST_FOLD_LEFT_2ND_D(D,BOOST_PP_LIST_REVERSE_F,(_,_,0),L)))
+#if !defined(BOOST_NO_COMPILER_CONFIG) && defined(__MWERKS__) && __MWERKS__ <= 0x2406
+#  define BOOST_PP_LIST_FOLD_RIGHT_2ND_F(D,P,H) (BOOST_PP_TUPLE_ELEM(2,0,P),BOOST_PP_TUPLE_ELEM(2,0,P)(D,H,BOOST_PP_TUPLE_ELEM(2,1,P)))
+#elif !defined(BOOST_NO_COMPILER_CONFIG) && defined(_MSC_VER)
+#  define BOOST_PP_LIST_FOLD_RIGHT_2ND_F(D,P,H) (BOOST_PP_TUPLE_ELEM(2,0,P),BOOST_PP_TUPLE_ELEM(2,0,P)(D,H,BOOST_PP_TUPLE2_ELEM1 P))
+#else
+#  define BOOST_PP_LIST_FOLD_RIGHT_2ND_F(D,P,H) (BOOST_PP_TUPLE2_ELEM0 P,BOOST_PP_TUPLE2_ELEM0 P(D,H,BOOST_PP_TUPLE2_ELEM1 P))
+#endif
+#endif
+#endif