>, which is
the "correct" name, if there is no clash. It provides two structure types,
<i>regex_t</i> for compiled internal forms, and <i>regmatch_t</i> for returning
captured substrings. It also defines some constants whose names start with
"REG_"; these are used for setting options and identifying error codes.
</p>
<h2><a name="SEC3" href="#TOC1">USING THE POSIX FUNCTIONS</a></h2>
<p>
Note that these functions are just POSIX-style wrappers for PCRE2's native API.
They do not give POSIX regular expression 