add boost on mac

macx64/include/boost/metaparse/v1/impl/next_digit.hpp

@@ -0,0 +1,36 @@
+#ifndef BOOST_METAPARSE_V1_IMPL_NEXT_DIGIT_HPP
+#define BOOST_METAPARSE_V1_IMPL_NEXT_DIGIT_HPP
+
+// Copyright Abel Sinkovics (abel@sinkovics.hu)  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)
+
+#include <boost/mpl/int.hpp>
+
+namespace boost
+{
+  namespace metaparse
+  {
+    namespace v1
+    {
+      namespace impl
+      {
+        struct next_digit
+        {
+          typedef next_digit type;
+
+          template <class PartialResult, class NextDigit>
+          struct apply :
+            boost::mpl::int_<
+              PartialResult::type::value * 10 + NextDigit::type::value
+            >
+          {};
+        };
+      }
+    }
+  }
+}
+
+#endif
+