\x1B hex char
\x{263a} wide hex char (Unicode SMILEY)
\c[ control char
+ \C{name} named char
\l lowercase next char (think vi)
\u uppercase next char (think vi)
\L lowercase till \E (think vi)
\Q quote (disable) pattern metacharacters till \E
If C<use locale> is in effect, the case map used by C<\l>, C<\L>, C<\u>
-and C<\U> is taken from the current locale. See L<perllocale>.
+and C<\U> is taken from the current locale. See L<perllocale>. For
+documentation of C<\C{name}>, see L<charnames>.
You cannot include a literal C<$> or C<@> within a C<\Q> sequence.
An unescaped C<$> or C<@> interpolates the corresponding variable,
\PP Match non-P
\X Match eXtended Unicode "combining character sequence",
equivalent to C<(?:\PM\pM*)>
- \C Match a single C char (octet) even under utf8.
+ \O Match a single C char (octet) even under utf8.
A C<\w> matches a single alphanumeric character, not a whole word.
Use C<\w+> to match a string of Perl-identifier characters (which isn't