forked from boostorg/beast
be67224390
buffer_cat now determines if all of the buffer sequences in the list of passed buffer sequences each have value types which are convertible to mutable_buffer. The returned concatenated sequence will be a MutableBufferSequence if all the passed buffer sequences meet the requirements of MutableBufferSequence, else the returned concatenated sequence will be a ConstBufferSequence.
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
//
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// Copyright (c) 2013-2016 Vinnie Falco (vinnie dot falco at gmail dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BEAST_BUFFER_CAT_HPP
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#define BEAST_BUFFER_CAT_HPP
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#include <beast/core/detail/buffer_cat.hpp>
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#include <boost/asio/buffer.hpp>
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#include <cstdint>
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#include <iterator>
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#include <new>
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#include <stdexcept>
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#include <tuple>
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#include <utility>
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namespace beast {
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/** Concatenate 2 or more buffer sequences.
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This function returns a constant or mutable buffer sequence which,
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when iterated, efficiently concatenates the input buffer sequences.
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Copies of the arguments passed will be made; however, the returned
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object does not take ownership of the underlying memory. The application
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is still responsible for managing the lifetime of the referenced memory.
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@param buffers The list of buffer sequences to concatenate.
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@return A new buffer sequence that represents the concatenation of
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the input buffer sequences. This buffer sequence will be a
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@b MutableBufferSequence if each of the passed buffer sequences is
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also a @b MutableBufferSequence, else the returned buffer sequence
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will be a @b ConstBufferSequence.
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*/
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#if GENERATING_DOCS
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template<class... BufferSequence>
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implementation_defined
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buffer_cat(BufferSequence const&... buffers)
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#else
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template<class B1, class B2, class... Bn>
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detail::buffer_cat_helper<B1, B2, Bn...>
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buffer_cat(B1 const& b1, B2 const& b2, Bn const&... bn)
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#endif
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{
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static_assert(
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detail::is_all_ConstBufferSequence<B1, B2, Bn...>::value,
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"BufferSequence requirements not met");
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return detail::buffer_cat_helper<
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B1, B2, Bn...>{b1, b2, bn...};
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}
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} // beast
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#endif
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