Vim regex

I was wanting to start some comments in a large Perl module the other day and not really had to use Vim's regexp to any great degree because I know Perl I decided to see if it could be done.

I decided to add a little bit of pod above every funcion. The following was the result Remember In vim the ^M is a control character for carriage return and can be achieved by holding down the control key and pressing carriage return.

The following regex

:%s/^sub$.*$ {$.*$$/=head \1^M^MDescrition:^M^M=cut^Msub \1{\2/

changes

sub summit_sub {
stuff;
}

=head summit_sub()

Descrition:

=cut
sub summit_sub{
stuff;
}

The following regex

:%s/^sub$.*$\n{$.*$$/=head \1^M^MDescrition:^M^M=cut^Msub \1{\2/

changes

sub summit_sub
{
stuff;
}

=head summit_sub ()

Descrition:

=cut
sub summit_sub {
stuff;
}