add boost on mac

macx64/include/boost/beast/http/empty_body.hpp

@@ -0,0 +1,131 @@
+//
+// 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_HTTP_EMPTY_BODY_HPP
+#define BOOST_BEAST_HTTP_EMPTY_BODY_HPP
+
+#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/http/error.hpp>
+#include <boost/beast/http/message.hpp>
+#include <boost/optional.hpp>
+
+namespace boost {
+namespace beast {
+namespace http {
+
+/** An empty <em>Body</em>
+
+    This body is used to represent messages which do not have a
+    message body. If this body is used with a parser, and the
+    parser encounters octets corresponding to a message body,
+    the parser will fail with the error @ref http::unexpected_body.
+
+    The Content-Length of this body is always 0.
+*/
+struct empty_body
+{
+    /** The type of container used for the body
+
+        This determines the type of @ref message::body
+        when this body type is used with a message container.
+    */
+    struct value_type
+    {
+    };
+
+    /** Returns the payload size of the body
+
+        When this body is used with @ref message::prepare_payload,
+        the Content-Length will be set to the payload size, and
+        any chunked Transfer-Encoding will be removed.
+    */
+    static
+    std::uint64_t
+    size(value_type)
+    {
+        return 0;
+    }
+
+    /** The algorithm for parsing the body
+
+        Meets the requirements of <em>BodyReader</em>.
+    */
+#if BOOST_BEAST_DOXYGEN
+    using reader = __implementation_defined__;
+#else
+    struct reader
+    {
+        template<bool isRequest, class Fields>
+        explicit
+        reader(header<isRequest, Fields>&, value_type&)
+        {
+        }
+
+        void
+        init(boost::optional<std::uint64_t> const&, error_code& ec)
+        {
+            ec = {};
+        }
+
+        template<class ConstBufferSequence>
+        std::size_t
+        put(ConstBufferSequence const&,
+            error_code& ec)
+        {
+            ec = error::unexpected_body;
+            return 0;
+        }
+
+        void
+        finish(error_code& ec)
+        {
+            ec = {};
+        }
+    };
+#endif
+
+    /** The algorithm for serializing the body
+
+        Meets the requirements of <em>BodyWriter</em>.
+    */
+#if BOOST_BEAST_DOXYGEN
+    using writer = __implementation_defined__;
+#else
+    struct writer
+    {
+        using const_buffers_type =
+            net::const_buffer;
+
+        template<bool isRequest, class Fields>
+        explicit
+        writer(header<isRequest, Fields> const&, value_type const&)
+        {
+        }
+
+        void
+        init(error_code& ec)
+        {
+            ec = {};
+        }
+
+        boost::optional<std::pair<const_buffers_type, bool>>
+        get(error_code& ec)
+        {
+            ec = {};
+            return boost::none;
+        }
+    };
+#endif
+};
+
+} // http
+} // beast
+} // boost
+
+#endif