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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.ConstBufferSequence"></a><a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">Constant buffer
sequence requirements</a>
</h3></div></div></div>
<p>
A <span class="emphasis"><em>constant buffer sequence</em></span> represents a set of memory
regions that may be used as input to an operation, such as the <code class="computeroutput">send</code>
operation of a socket.
</p>
<p>
A type <code class="computeroutput">X</code> meets the <code class="computeroutput">ConstBufferSequence</code> requirements
if it satisfies the requirements of <code class="computeroutput">Destructible</code> (C++Std [destructible])
and <code class="computeroutput">CopyConstructible</code> (C++Std [copyconstructible]), as well
as the additional requirements listed below.
</p>
<p>
In the table below, <code class="computeroutput">x</code> denotes a (possibly const) value of type
<code class="computeroutput">X</code>, and <code class="computeroutput">u</code> denotes an identifier.
</p>
<div class="table">
<a name="boost_asio.reference.ConstBufferSequence.t0"></a><p class="title"><b>Table 8. ConstBufferSequence requirements</b></p>
<div class="table-contents"><table class="table" summary="ConstBufferSequence requirements">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
expression
</p>
</th>
<th>
<p>
return type
</p>
</th>
<th>
<p>
assertion/note<br> pre/post-condition
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<code class="computeroutput">boost::asio::buffer_sequence_begin(x)</code><br> <code class="computeroutput">boost::asio::buffer_sequence_end(x)</code>
</p>
</td>
<td>
<p>
An iterator type meeting the requirements for bidirectional iterators
(C++Std [bidirectional.iterators]) whose value type is convertible
to <code class="computeroutput">const_buffer</code>.
</p>
</td>
<td>
</td>
</tr>
<tr>
<td>
<p>
</p>
<pre class="programlisting">X u(x);
</pre>
<p>
</p>
</td>
<td>
</td>
<td>
<p>
post:<br>
</p>
<pre class="programlisting">equal(
boost::asio::buffer_sequence_begin(x),
boost::asio::buffer_sequence_end(x),
boost::asio::buffer_sequence_begin(u),
boost::asio::buffer_sequence_end(u),
[](const const_buffer& b1,
const const_buffer& b2)
{
return b1.data() == b2.data()
&& b1.size() == b2.size();
})
</pre>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2018 Christopher M. Kohlhoff<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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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