131 lines
4.9 KiB
HTML
131 lines
4.9 KiB
HTML
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>Constant buffer sequence requirements</title>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="asio.reference.ConstBufferSequence"></a><a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">Constant buffer sequence
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requirements</a>
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</h3></div></div></div>
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<p>
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A <span class="emphasis"><em>constant buffer sequence</em></span> represents a set of memory
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regions that may be used as input to an operation, such as the <code class="computeroutput">send</code>
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operation of a socket.
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</p>
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<p>
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A type <code class="computeroutput">X</code> meets the <code class="computeroutput">ConstBufferSequence</code> requirements
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if it satisfies the requirements of <code class="computeroutput">Destructible</code> (C++Std [destructible])
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and <code class="computeroutput">CopyConstructible</code> (C++Std [copyconstructible]), as well
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as the additional requirements listed below.
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</p>
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<p>
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In the table below, <code class="computeroutput">x</code> denotes a (possibly const) value of type
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<code class="computeroutput">X</code>, and <code class="computeroutput">u</code> denotes an identifier.
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</p>
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<div class="table">
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<a name="asio.reference.ConstBufferSequence.t0"></a><p class="title"><b>Table 8. ConstBufferSequence requirements</b></p>
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<div class="table-contents"><table class="table" summary="ConstBufferSequence requirements">
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<colgroup>
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<col>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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expression
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</p>
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</th>
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<th>
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<p>
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return type
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</p>
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</th>
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<th>
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<p>
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assertion/note<br> pre/post-condition
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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<code class="computeroutput">asio::buffer_sequence_begin(x)</code><br> <code class="computeroutput">asio::buffer_sequence_end(x)</code>
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</p>
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</td>
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<td>
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<p>
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An iterator type meeting the requirements for bidirectional iterators
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(C++Std [bidirectional.iterators]) whose value type is convertible
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to <code class="computeroutput">const_buffer</code>.
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</p>
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</td>
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<td>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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</p>
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<pre class="programlisting">X u(x);
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</pre>
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<p>
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</p>
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</td>
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<td>
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</td>
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<td>
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<p>
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post:<br>
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</p>
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<pre class="programlisting">equal(
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asio::buffer_sequence_begin(x),
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asio::buffer_sequence_end(x),
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asio::buffer_sequence_begin(u),
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asio::buffer_sequence_end(u),
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[](const const_buffer& b1,
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const const_buffer& b2)
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{
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return b1.data() == b2.data()
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&& b1.size() == b2.size();
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})
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</pre>
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<p>
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<br class="table-break">
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
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Kohlhoff<p>
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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 <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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</p>
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</div></td>
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</tr></table>
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<hr>
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