 is returned. The <i>nmatch</i> and <i>pmatch</i> arguments of
<b>pcre2_regexec()</b> are ignored (except possibly as input for REG_STARTEND).
</p>
<p>
The value of <i>nmatch</i> may be zero, and the value <i>pmatch</i> may be NULL
(unless REG_STARTEND is set); in both these cases no data about any matched
strings is returned.
</p>
<p>
Otherwise, the portion of the string that was matched, and also any captured
substrings, are returned via the <i>pmatch</i> argument, which points to an
array of <i>nmatch</i