add boost on mac

macx64/include/boost/metaparse/v1/cpp98/impl/pop_back.hpp

@@ -0,0 +1,39 @@
+#ifndef BOOST_METAPARSE_V1_CPP98_IMPL_POP_BACK_HPP
+#define BOOST_METAPARSE_V1_CPP98_IMPL_POP_BACK_HPP
+
+// Copyright Abel Sinkovics (abel@sinkovics.hu)  2013.
+// 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)
+
+#include <boost/metaparse/v1/cpp98/fwd/string.hpp>
+#include <boost/metaparse/v1/cpp98/impl/push_front_c.hpp>
+#include <boost/metaparse/v1/cpp98/impl/size.hpp>
+#include <boost/metaparse/v1/cpp98/impl/update_c.hpp>
+
+namespace boost
+{
+  namespace metaparse
+  {
+    namespace v1
+    {
+      namespace impl
+      {
+        template <class S>
+        struct pop_back;
+
+        template <class S>
+        struct pop_back :
+          update_c<
+            typename S::type,
+            size<typename S::type>::type::value - 1,
+            BOOST_NO_CHAR
+          >
+        {};
+      }
+    }
+  }
+}
+
+#endif
+