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<html>
<head>
<title>pcre2_set_optimize specification</title>
</head>
<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
<h1>pcre2_set_optimize man page</h1>
<p>
Return to the <a href="index.html">PCRE2 index page</a>.
</p>
<p>
This page is part of the PCRE2 HTML documentation. It was generated
automatically from the original man page. If there is any nonsense in it,
please consult the man page, in case the conversion went wrong.
<br>
<br><b>
SYNOPSIS
</b><br>
<P>
<b>#include <pcre2.h></b>
</P>
<P>
<b>int pcre2_set_optimize(pcre2_compile_context *<i>ccontext</i>,</b>
<b> uint32_t <i>directive</i>);</b>
</P>
<br><b>
DESCRIPTION
</b><br>
<P>
This function controls which performance optimizations will be applied
by <b>pcre2_compile()</b>. It can be called multiple times with the same compile
context; the effects are cumulative, with the effects of later calls taking
precedence over earlier ones.
</P>
<P>
The result is zero for success, PCRE2_ERROR_NULL if <i>ccontext</i> is NULL,
or PCRE2_ERROR_BADOPTION if <i>directive</i> is unknown. The latter could be
useful to detect if a certain optimization is available.
</P>
<P>
The list of possible values for the <i>directive</i> parameter are:
<pre>
PCRE2_OPTIMIZATION_FULL Enable all optimizations (default)
PCRE2_OPTIMIZATION_NONE Disable all optimizations
PCRE2_AUTO_POSSESS Enable auto-possessification
PCRE2_AUTO_POSSESS_OFF Disable auto-possessification
PCRE2_DOTSTAR_ANCHOR Enable implicit dotstar anchoring
PCRE2_DOTSTAR_ANCHOR_OFF Disable implicit dotstar anchoring
PCRE2_START_OPTIMIZE Enable start-up optimizations at match time
PCRE2_START_OPTIMIZE_OFF Disable start-up optimizations at match time
</pre>
There is a complete description of the PCRE2 native API, including detailed
descriptions <i>directive</i> parameter values in the
<a href="pcre2api.html"><b>pcre2api</b></a>
page.
<p>
Return to the <a href="index.html">PCRE2 index page</a>.
</p>
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