add boost on mac

macx64/include/boost/contract/detail/inlined/old.hpp

@@ -0,0 +1,34 @@
+
+#ifndef BOOST_CONTRACT_DETAIL_INLINED_OLD_HPP_
+#define BOOST_CONTRACT_DETAIL_INLINED_OLD_HPP_
+
+// Copyright (C) 2008-2018 Lorenzo Caminiti
+// Distributed under the Boost Software License, Version 1.0 (see accompanying
+// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
+// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
+
+// IMPORTANT: Do NOT use config macros BOOST_CONTRACT_... in this file so lib
+// .cpp does not need recompiling if config changes (recompile only user code).
+
+#include <boost/contract/old.hpp>
+#include <boost/contract/detail/declspec.hpp>
+
+namespace boost { namespace contract {
+
+BOOST_CONTRACT_DETAIL_DECLINLINE
+old_value null_old() { return old_value(); }
+
+BOOST_CONTRACT_DETAIL_DECLINLINE
+old_pointer make_old(old_value const& old) {
+    return old_pointer(0, old);
+}
+
+BOOST_CONTRACT_DETAIL_DECLINLINE
+old_pointer make_old(virtual_* v, old_value const& old) {
+    return old_pointer(v, old);
+}
+
+} } // namespacd
+
+#endif // #include guard
+