=over

=item $POSTMATCH

=item $'
X<$'> X<$POSTMATCH> X<@->

The string following whatever was matched by the last successful
pattern match. (See L</Scoping Rules of Regex Variables>). Example:

    local $_ = 'abcdefghi';
    /def/;
    print "$`:$&:$'\n";       # prints abc:def:ghi

See L</Performance issues> above for the serious performance implications
of using this variable (even once) in your code.

This variable is read-only, and its value is dynamically scoped.

Mnemonic: C<'> often follows a quoted string.

=back