E. It does not affect the way
newlines are matched by the dot metacharacter (they are not) or by a negative
class such as [^a] (they are).
</p>
<p>
The yield of <b>pcre2_regcomp()</b> is zero on success, and non-zero otherwise.
The <i>preg</i> structure is filled in on success, and one other member of the
structure (as well as <i>re_endp</i>) is public: <i>re_nsub</i> contains the
number of capturing subpatterns in the regular expression. Various error codes
are defined in the header file.
</p>
<p>
NOTE: If