45 lines
3.1 KiB
HTML
45 lines
3.1 KiB
HTML
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>Read handler requirements</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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<link rel="home" href="../../index.html" title="Asio">
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<link rel="up" href="../reference.html" title="Reference">
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<link rel="prev" href="RangeConnectToken.html" title="Range connect token requirements">
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<link rel="next" href="ReadToken.html" title="Read token requirements">
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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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<hr>
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<a accesskey="p" href="RangeConnectToken.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ReadToken.html"><img src="../../next.png" alt="Next"></a>
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</div>
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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.ReadHandler"></a><a class="link" href="ReadHandler.html" title="Read handler requirements">Read handler requirements</a>
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</h3></div></div></div>
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<p>
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A read handler must meet the requirements for a <a class="link" href="Handler.html" title="Handlers">handler</a>.
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A value <code class="computeroutput"><span class="identifier">h</span></code> of a read handler
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class should work correctly in the expression <code class="computeroutput"><span class="identifier">h</span><span class="special">(</span><span class="identifier">ec</span><span class="special">,</span>
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<span class="identifier">s</span><span class="special">)</span></code>,
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where <code class="computeroutput"><span class="identifier">ec</span></code> is an lvalue of
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type <code class="computeroutput"><span class="keyword">const</span> <span class="identifier">error_code</span></code>
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and <code class="computeroutput"><span class="identifier">s</span></code> is an lvalue of type
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<code class="computeroutput"><span class="keyword">const</span> <span class="identifier">size_t</span></code>.
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</p>
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</div>
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<div class="copyright-footer">Copyright © 2003-2023 Christopher M. 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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<a accesskey="p" href="RangeConnectToken.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.html"><img src="../../up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../home.png" alt="Home"></a><a accesskey="n" href="ReadToken.html"><img src="../../next.png" alt="Next"></a>
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