<a name="beast.ref.boost__beast__http__async_write_header"></a><a class="link" href="boost__beast__http__async_write_header.html" title="http::async_write_header">http::async_write_header</a>
</h4></div></div></div>
<p>
- <a class="indexterm" name="idm45886657076384"></a>
+ <a class="indexterm" name="idm45873506283920"></a>
Write a header to a stream asynchronously using a
serializer.
</p>
<span class="keyword">bool</span> <span class="identifier">isRequest</span><span class="special">,</span>
<span class="keyword">class</span> <a class="link" href="../concepts/Body.html" title="Body"><span class="emphasis"><em>Body</em></span></a><span class="special">,</span>
<span class="keyword">class</span> <a class="link" href="../concepts/Fields.html" title="Fields"><span class="emphasis"><em>Fields</em></span></a><span class="special">,</span>
- <span class="keyword">class</span> <a href="../../../../../../doc/html/boost_asio/reference/WriteHandler.html" target="_top"><span class="emphasis"><em>WriteHandler</em></span></a><span class="special">></span>
+ <span class="keyword">class</span> <a href="../../../../../../doc/html/boost_asio/reference/WriteHandler.html" target="_top"><span class="emphasis"><em>WriteHandler</em></span></a> <span class="special">=</span> <span class="identifier">net</span><span class="special">::</span><span class="identifier">default_completion_token_t</span><span class="special"><</span> <span class="identifier">executor_type</span><span class="special"><</span><span class="identifier">AsyncWriteStream</span><span class="special">>>></span>
<a href="../../../../../../doc/html/boost_asio/reference/asynchronous_operations.html#boost_asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type" target="_top"><span class="emphasis"><em>DEDUCED</em></span></a>
<span class="identifier">async_write_header</span><span class="special">(</span>
<span class="identifier">AsyncWriteStream</span><span class="special">&</span> <span class="identifier">stream</span><span class="special">,</span>
<span class="identifier">serializer</span><span class="special"><</span> <span class="identifier">isRequest</span><span class="special">,</span> <span class="identifier">Body</span><span class="special">,</span> <span class="identifier">Fields</span> <span class="special">>&</span> <span class="identifier">sr</span><span class="special">,</span>
- <span class="identifier">WriteHandler</span><span class="special">&&</span> <span class="identifier">handler</span><span class="special">);</span>
+ <span class="identifier">WriteHandler</span><span class="special">&&</span> <span class="identifier">handler</span> <span class="special">=</span> <span class="identifier">net</span><span class="special">::</span><span class="identifier">default_completion_token_t</span><span class="special"><</span> <span class="identifier">executor_type</span><span class="special"><</span> <span class="identifier">AsyncWriteStream</span> <span class="special">>>{});</span>
</pre>
<h5>
<a name="beast.ref.boost__beast__http__async_write_header.h1"></a>