C<\R> matches a generic linebreak, that is, vertical whitespace, plus
the multi-character sequence C<"\x0D\x0A">.
+=item Optional pre-match and post-match captures with the /p flag
+
+There is a new flag C</p> for regular expressions. Using this
+makes the engine preserve a copy of the part of the matched string before
+the matching substring to the new special variable C<${^PREMATCH}>, the
+part after the matching substring to C<${^POSTMATCH}>, and the matched
+substring itself to C<${^MATCH}>.
+
+Perl is still able to store these substrings to the special variables
+C<$`>, C<$'>, C<$&>, but using these variables anywhere in the program
+adds a penalty to all regular expression matches, whereas if you use
+the C</p> flag and the new special variables instead, you pay only for
+the regular expressions where the flag is used.
+
+For more detail on the new variables, see L<perlvar>; for the use of
+the regular expression flag, see L<perlop> and L<perlre>.
+
=back
=head2 C<say()>
used to write pluggable regular expression engines (by Ævar Arnfjörð
Bjarmason).
-The L<perlunitut> manpage is an tutorial for programming with Unicode and
+The L<perlunitut> manpage is a tutorial for programming with Unicode and
string encodings in Perl, courtesy of Juerd Waalboer.
A new manual page, L<perlunifaq> (the Perl Unicode FAQ), has been added
The anonymous hash and array constructors now take 1 op in the optree
instead of 3, now that pp_anonhash and pp_anonlist return a reference to
-an hash/array when the op is flagged with OPf_SPECIAL. (Nicholas Clark)
+a hash/array when the op is flagged with OPf_SPECIAL. (Nicholas Clark)
=head1 Known Problems