From 70e775452ace77c19506282d84be29eade10b636 Mon Sep 17 00:00:00 2001
From: Edward Diener <eldiener@tropicsoft.com>
Date: Sat, 3 May 2014 02:15:47 -0400
Subject: [PATCH] Added remove_parens and tests.

---
 include/boost/preprocessor/punctuation.hpp    |  1 +
 .../punctuation/remove_parens.hpp             | 39 +++++++++++++++++++
 test/punctuation.cxx                          | 12 ++++++
 3 files changed, 52 insertions(+)
 create mode 100644 include/boost/preprocessor/punctuation/remove_parens.hpp

diff --git a/include/boost/preprocessor/punctuation.hpp b/include/boost/preprocessor/punctuation.hpp
index a96bbff..56dd064 100644
--- a/include/boost/preprocessor/punctuation.hpp
+++ b/include/boost/preprocessor/punctuation.hpp
@@ -17,5 +17,6 @@
 # include <boost/preprocessor/punctuation/is_begin_parens.hpp>
 # include <boost/preprocessor/punctuation/paren.hpp>
 # include <boost/preprocessor/punctuation/paren_if.hpp>
+# include <boost/preprocessor/punctuation/remove_parens.hpp>
 #
 # endif
diff --git a/include/boost/preprocessor/punctuation/remove_parens.hpp b/include/boost/preprocessor/punctuation/remove_parens.hpp
new file mode 100644
index 0000000..4700936
--- /dev/null
+++ b/include/boost/preprocessor/punctuation/remove_parens.hpp
@@ -0,0 +1,39 @@
+# /* **************************************************************************
+#  *                                                                          *
+#  *     (C) Copyright Edward Diener 2014.
+#  *     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_REMOVE_PARENS_HPP
+#define BOOST_PREPROCESSOR_REMOVE_PARENS_HPP
+
+#include <boost/preprocessor/config/config.hpp>
+
+#if BOOST_PP_VARIADICS
+
+#include <boost/preprocessor/control/iif.hpp>
+#include <boost/preprocessor/facilities/identity.hpp>
+#include <boost/preprocessor/punctuation/is_begin_parens.hpp>
+#include <boost/preprocessor/tuple/enum.hpp>
+
+#define BOOST_PP_REMOVE_PARENS(param) \
+    BOOST_PP_IIF \
+      ( \
+      BOOST_PP_IS_BEGIN_PARENS(param), \
+      BOOST_PP_REMOVE_PARENS_DO, \
+      BOOST_PP_IDENTITY \
+      ) \
+    (param)() \
+/**/
+
+#define BOOST_PP_REMOVE_PARENS_DO(param) \
+  BOOST_PP_IDENTITY(BOOST_PP_TUPLE_ENUM(param)) \
+/**/
+
+#endif /* BOOST_PP_VARIADICS */
+#endif /* BOOST_PREPROCESSOR_REMOVE_PARENS_HPP */
diff --git a/test/punctuation.cxx b/test/punctuation.cxx
index 3eb364b..8e60e9a 100644
--- a/test/punctuation.cxx
+++ b/test/punctuation.cxx
@@ -23,6 +23,11 @@
 # define A_SEQ (r)($)(#)
 # define AN_ARRAY (4,(5,7,f,x)) 
 # define A_LIST (e,(g,(&,BOOST_PP_NIL)))
+# define DATA (5 + 3) * 4
+# define DATA2 4 * (5 + 3)
+# define DATA3 4 * (5 + 3) * (2 + 1)
+# define DATA4 (5 + 3) * (2 + 1) * 4
+  
   
 // is_begin_parens
 
@@ -39,4 +44,11 @@ BEGIN BOOST_PP_IS_BEGIN_PARENS(AN_ARRAY) == 1 END
 BEGIN BOOST_PP_IS_BEGIN_PARENS(A_LIST) == 1 END
 BEGIN BOOST_PP_IS_BEGIN_PARENS((y)2(x)) == 1 END
 
+// remove_parens
+
+BEGIN BOOST_PP_REMOVE_PARENS(DATA) == 17 END
+BEGIN BOOST_PP_REMOVE_PARENS(DATA2)== 32 END
+BEGIN BOOST_PP_REMOVE_PARENS(DATA3)== 96 END
+BEGIN BOOST_PP_REMOVE_PARENS(DATA4)== 41 END
+
 #endif