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'
}