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<title>async_read</title>
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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.async_read"></a><a class="link" href="async_read.html" title="async_read">async_read</a>
</h3></div></div></div>
<p>
<a class="indexterm" name="boost_asio.indexterm.async_read"></a>
Start an asynchronous operation
to read a certain amount of data from a stream.
</p>
<pre class="programlisting">template<
typename <a class="link" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
typename <a class="link" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a>,
typename <a class="link" href="ReadHandler.html" title="Read handler requirements">ReadHandler</a>>
<a class="link" href="asynchronous_operations/automatic_deduction_of_initiating_function_return_type.html" title="Automatic deduction of initiating function return type"><span class="emphasis"><em>DEDUCED</em></span></a> <a class="link" href="async_read/overload1.html" title="async_read (1 of 6 overloads)">async_read</a>(
AsyncReadStream & s,
const MutableBufferSequence & buffers,
ReadHandler && handler,
typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0);
<span class="emphasis"><em>» <a class="link" href="async_read/overload1.html" title="async_read (1 of 6 overloads)">more...</a></em></span>
template<
typename <a class="link" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
typename <a class="link" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a>,
typename <a class="link" href="CompletionCondition.html" title="Completion condition requirements">CompletionCondition</a>,
typename <a class="link" href="ReadHandler.html" title="Read handler requirements">ReadHandler</a>>
<a class="link" href="asynchronous_operations/automatic_deduction_of_initiating_function_return_type.html" title="Automatic deduction of initiating function return type"><span class="emphasis"><em>DEDUCED</em></span></a> <a class="link" href="async_read/overload2.html" title="async_read (2 of 6 overloads)">async_read</a>(
AsyncReadStream & s,
const MutableBufferSequence & buffers,
CompletionCondition completion_condition,
ReadHandler && handler,
typename enable_if< is_mutable_buffer_sequence< MutableBufferSequence >::value >::type * = 0);
<span class="emphasis"><em>» <a class="link" href="async_read/overload2.html" title="async_read (2 of 6 overloads)">more...</a></em></span>
template<
typename <a class="link" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
typename <a class="link" href="DynamicBuffer.html" title="Dynamic buffer requirements">DynamicBuffer</a>,
typename <a class="link" href="ReadHandler.html" title="Read handler requirements">ReadHandler</a>>
<a class="link" href="asynchronous_operations/automatic_deduction_of_initiating_function_return_type.html" title="Automatic deduction of initiating function return type"><span class="emphasis"><em>DEDUCED</em></span></a> <a class="link" href="async_read/overload3.html" title="async_read (3 of 6 overloads)">async_read</a>(
AsyncReadStream & s,
DynamicBuffer && buffers,
ReadHandler && handler,
typename enable_if< is_dynamic_buffer< typename decay< DynamicBuffer >::type >::value >::type * = 0);
<span class="emphasis"><em>» <a class="link" href="async_read/overload3.html" title="async_read (3 of 6 overloads)">more...</a></em></span>
template<
typename <a class="link" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
typename <a class="link" href="DynamicBuffer.html" title="Dynamic buffer requirements">DynamicBuffer</a>,
typename <a class="link" href="CompletionCondition.html" title="Completion condition requirements">CompletionCondition</a>,
typename <a class="link" href="ReadHandler.html" title="Read handler requirements">ReadHandler</a>>
<a class="link" href="asynchronous_operations/automatic_deduction_of_initiating_function_return_type.html" title="Automatic deduction of initiating function return type"><span class="emphasis"><em>DEDUCED</em></span></a> <a class="link" href="async_read/overload4.html" title="async_read (4 of 6 overloads)">async_read</a>(
AsyncReadStream & s,
DynamicBuffer && buffers,
CompletionCondition completion_condition,
ReadHandler && handler,
typename enable_if< is_dynamic_buffer< typename decay< DynamicBuffer >::type >::value >::type * = 0);
<span class="emphasis"><em>» <a class="link" href="async_read/overload4.html" title="async_read (4 of 6 overloads)">more...</a></em></span>
template<
typename <a class="link" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
typename Allocator,
typename <a class="link" href="ReadHandler.html" title="Read handler requirements">ReadHandler</a>>
<a class="link" href="asynchronous_operations/automatic_deduction_of_initiating_function_return_type.html" title="Automatic deduction of initiating function return type"><span class="emphasis"><em>DEDUCED</em></span></a> <a class="link" href="async_read/overload5.html" title="async_read (5 of 6 overloads)">async_read</a>(
AsyncReadStream & s,
basic_streambuf< Allocator > & b,
ReadHandler && handler);
<span class="emphasis"><em>» <a class="link" href="async_read/overload5.html" title="async_read (5 of 6 overloads)">more...</a></em></span>
template<
typename <a class="link" href="AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
typename Allocator,
typename <a class="link" href="CompletionCondition.html" title="Completion condition requirements">CompletionCondition</a>,
typename <a class="link" href="ReadHandler.html" title="Read handler requirements">ReadHandler</a>>
<a class="link" href="asynchronous_operations/automatic_deduction_of_initiating_function_return_type.html" title="Automatic deduction of initiating function return type"><span class="emphasis"><em>DEDUCED</em></span></a> <a class="link" href="async_read/overload6.html" title="async_read (6 of 6 overloads)">async_read</a>(
AsyncReadStream & s,
basic_streambuf< Allocator > & b,
CompletionCondition completion_condition,
ReadHandler && handler);
<span class="emphasis"><em>» <a class="link" href="async_read/overload6.html" title="async_read (6 of 6 overloads)">more...</a></em></span>
</pre>
<h5>
<a name="boost_asio.reference.async_read.h0"></a>
<span class="phrase"><a name="boost_asio.reference.async_read.requirements"></a></span><a class="link" href="async_read.html#boost_asio.reference.async_read.requirements">Requirements</a>
</h5>
<p>
<span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/read.hpp</code>
</p>
<p>
<span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio.hpp</code>
</p>
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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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