Function echo

test/doc/websocket_8_notes.cpp:74–80

//[code_websocket_8_1f

void echo(stream<tcp_stream>& ws,
    multi_buffer& buffer, net::yield_context yield)
{
    ws.async_read(buffer, yield);
    std::future<std::size_t> fut =
        ws.async_write(buffer.data(), net::use_future);
}

//]
//#endif