There are also some non-alnum characters that have special meaning though their meaning might be (a bit) different than in PCRE: A . can match any character. Even newline.
examples/regex2/match_any_character.p6#!/usr/bin/env perl6 use v6; my $str = 'The black cat climbed to the green tree.'; if ($str ~~ m/c./) { say "Matching '$/'"; # 'ck' } my $text = " The black cat climebed the greeen tree"; if ($text ~~ m/t./) { say "Matching '$/'"; # 't ' with the second ' on a new line } if ($text ~~ m/t\N/) { say "Matching '$/'"; # 'th' of the word 'the' }