add boost on mac

macx64/include/boost/beast/core/role.hpp

@@ -0,0 +1,50 @@
+//
+// 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_ROLE_HPP
+#define BOOST_BEAST_ROLE_HPP
+
+#include <boost/beast/core/detail/config.hpp>
+
+namespace boost {
+namespace beast {
+
+/** The role of local or remote peer.
+
+    Whether the endpoint is a client or server affects the
+    behavior of teardown.
+    The teardown behavior also depends on the type of the stream
+    being torn down.
+    
+    The default implementation of teardown for regular
+    TCP/IP sockets is as follows:
+
+    @li In the client role, a TCP/IP shutdown is sent after
+    reading all remaining data on the connection.
+
+    @li In the server role, a TCP/IP shutdown is sent before
+    reading all remaining data on the connection.
+
+    When the next layer type is a `net::ssl::stream`,
+    the connection is closed by performing the SSL closing
+    handshake corresponding to the role type, client or server.
+*/
+enum class role_type
+{
+    /// The stream is operating as a client.
+    client,
+
+    /// The stream is operating as a server.
+    server
+};
+
+} // beast
+} // boost
+
+#endif