I disagree quite strongly on the BEGIN issue.
in reply to (tye)Re: Supersplit
in thread Supersplit
When someone loads your module via use or require, there
is no gap between the finish of parsing your module and
the execution of code in your module. Therefore there is
no possibility of a race if you don't play games with
BEGIN in your module, and stupid games are not played
while checking who is loading you. I assume, of course,
that you are nt using an unstable experimental feature.
(ie Threads. And if Perl 6 gets into races with
initialization code while loading modules, then that is a
showstopper in my books!)
If I am wrong then please show me how exactly this race can
happen in Perl. If it is something which I think could
possibly happen to me, then I will start blocking it. But
not unless. In general I won't put energy into defensively
coding against things that I don't think I will get wrong.
Conversely if it is something that I can conceivably get
wrong by accident, I will become a paranoid nut. :-)
Now I will give you a very good reason not to move
your initialization into BEGIN. If you don't move your
manipulation of @ISA into BEGIN, then on 5.005 (and if they
fix the stupid $Carp::CarpLevel games in Exporter on 5.6
as well) if you mess up a use statement then you will by
default get it correctly reported from the correct package
in your module rather than from the module which uses
you. If you move the manipulation of @ISA into BEGIN or
use base to achieve the same effect you will mess that
up. (Note that the fixed Carp that will appear in 5.8
does not have this issue.) Therefore by not playing games
with what parts of your initializations occur before your
module is done compiling, you will get error reporting which
is more likely to be informative.
So the BEGIN time initialization not only doesn't buy me
anything that I care about, it loses me something that I
consider very important!
The qr// point is a matter of taste and environment. No,
it is not supported in older Perl's. If that is an issue
for you, then it is easy enough to drop it and just split