add boost on mac

macx64/include/boost/beast/websocket/impl/error.hpp

@@ -0,0 +1,44 @@
+//
+// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// 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)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_WEBSOCKET_IMPL_ERROR_HPP
+#define BOOST_BEAST_WEBSOCKET_IMPL_ERROR_HPP
+
+namespace boost {
+namespace system {
+template<>
+struct is_error_code_enum<::boost::beast::websocket::error>
+{
+    static bool const value = true;
+};
+template<>
+struct is_error_condition_enum<::boost::beast::websocket::condition>
+{
+    static bool const value = true;
+};
+} // system
+} // boost
+
+namespace boost {
+namespace beast {
+namespace websocket {
+
+BOOST_BEAST_DECL
+error_code
+make_error_code(error e);
+
+BOOST_BEAST_DECL
+error_condition
+make_error_condition(condition c);
+
+} // websocket
+} // beast
+} // boost
+
+#endif