//------------------------------------------------------------------------------
/*
    This file is part of Beast: https://github.com/vinniefalco/Beast
    Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>

    Permission to use, copy, modify, and/or distribute this software for any
    purpose  with  or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.

    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================

#ifndef BEAST_SOCKETINTERFACE_H_INCLUDED
#define BEAST_SOCKETINTERFACE_H_INCLUDED

/** These define the interfaces that SocketWrapper can adapt with SFINAE. */
struct SocketInterface
{
    // has close()
    struct Close { };

    /** Tag for some compatibility with boost::asio::basic_socket_acceptor
        http://www.boost.org/doc/libs/1_54_0/doc/html/boost_asio/reference/basic_socket_acceptor.html
    */
    struct Acceptor : Close { };

    // Has lowest_layer() and lowest_layer_type
    struct LowestLayer { };

    /** Tag for parts of boost::asio::basic_socket
        http://www.boost.org/doc/libs/1_54_0/doc/html/boost_asio/reference/basic_socket.html
    */
    struct Socket : Close, LowestLayer { };

    /** Tag for parts of boost::asio::basic_stream_socket
        http://www.boost.org/doc/libs/1_54_0/doc/html/boost_asio/reference/basic_stream_socket.html
    */
    struct SyncStream { };
    struct AsyncStream { };
    struct Stream : SyncStream, AsyncStream { };

    /** Tags for parts of boost::asio::ssl::stream
        http://www.boost.org/doc/libs/1_54_0/doc/html/boost_asio/reference/ssl__stream.html
    */
    struct AnyHandshake { };
    struct SyncHandshake : AnyHandshake { };
    struct AsyncHandshake : AnyHandshake { };
    struct BufferedSyncHandshake : AnyHandshake { };
    struct BufferedAsyncHandshake : AnyHandshake { };
    struct Handshake : SyncHandshake, AsyncHandshake,
                       BufferedSyncHandshake, BufferedAsyncHandshake,
                       LowestLayer { };
};

#endif