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diff --git a/boost/beast/core/buffers_cat.hpp b/boost/beast/core/buffers_cat.hpp
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+//
+// Copyright (c) 2016-2017 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_BUFFERS_CAT_HPP
+#define BOOST_BEAST_BUFFERS_CAT_HPP
+
+#include <boost/beast/core/detail/config.hpp>
+#include <boost/beast/core/detail/type_traits.hpp>
+#include <tuple>
+
+namespace boost {
+namespace beast {
+
+/** A buffer sequence representing a concatenation of buffer sequences.
+
+    @see @ref buffers_cat
+*/
+template<class... Buffers>
+class buffers_cat_view
+{
+    std::tuple<Buffers...> bn_;
+
+public:
+    /** The type of buffer returned when dereferencing an iterator.
+
+        If every buffer sequence in the view is a @b MutableBufferSequence,
+        then `value_type` will be `boost::asio::mutable_buffer`.
+        Otherwise, `value_type` will be `boost::asio::const_buffer`.
+    */
+#if BOOST_BEAST_DOXYGEN
+    using value_type = implementation_defined;
+#else
+    using value_type = typename
+        detail::common_buffers_type<Buffers...>::type;
+#endif
+
+    /// The type of iterator used by the concatenated sequence
+    class const_iterator;
+
+    /// Constructor
+    buffers_cat_view(buffers_cat_view&&) = default;
+
+    /// Assignment
+    buffers_cat_view& operator=(buffers_cat_view&&) = default;
+
+    /// Assignment
+    buffers_cat_view& operator=(buffers_cat_view const&) = default;
+
+    /** Constructor
+
+        @param buffers The list of buffer sequences to concatenate.
+        Copies of the arguments will be made; however, the ownership
+        of memory is not transferred.
+    */
+    explicit
+    buffers_cat_view(Buffers const&... buffers);
+
+    //-----
+
+    /// Required for @b BufferSequence
+    buffers_cat_view(buffers_cat_view const&) = default;
+
+    /// Required for @b BufferSequence
+    const_iterator
+    begin() const;
+
+    /// Required for @b BufferSequence
+    const_iterator
+    end() const;
+};
+
+/** Concatenate 2 or more buffer sequences.
+
+    This function returns a constant or mutable buffer sequence which,
+    when iterated, efficiently concatenates the input buffer sequences.
+    Copies of the arguments passed will be made; however, the returned
+    object does not take ownership of the underlying memory. The
+    application is still responsible for managing the lifetime of the
+    referenced memory.
+
+    @param buffers The list of buffer sequences to concatenate.
+
+    @return A new buffer sequence that represents the concatenation of
+    the input buffer sequences. This buffer sequence will be a
+    @b MutableBufferSequence if each of the passed buffer sequences is
+    also a @b MutableBufferSequence; otherwise the returned buffer
+    sequence will be a @b ConstBufferSequence.
+
+    @see @ref buffers_cat_view
+*/
+#if BOOST_BEAST_DOXYGEN
+template<class... BufferSequence>
+buffers_cat_view<BufferSequence...>
+buffers_cat(BufferSequence const&... buffers)
+#else
+template<class B1, class B2, class... Bn>
+inline
+buffers_cat_view<B1, B2, Bn...>
+buffers_cat(B1 const& b1, B2 const& b2, Bn const&... bn)
+#endif
+{
+    static_assert(
+        detail::is_all_const_buffer_sequence<B1, B2, Bn...>::value,
+            "BufferSequence requirements not met");
+    return buffers_cat_view<B1, B2, Bn...>{b1, b2, bn...};
+}
+
+} // beast
+} // boost
+
+#include <boost/beast/core/impl/buffers_cat.ipp>
+
+#endif