ive function. This causes PCRE2 to use Unicode properties
when matching \d, \w, etc., instead of just recognizing ASCII values. Note
that REG_UCP is not part of the POSIX standard.
<pre>
  REG_UNGREEDY
</pre>
The PCRE2_UNGREEDY option is set when the regular expression is passed for
compilation to the native function. Note that REG_UNGREEDY is not part of the
POSIX standard.
<pre>
  REG_UTF
</pre>
The PCRE2_UTF option is set when the regular expression is passed for
compilation to the native function. This 