Perl.Org wrote:
Gunnar Hjalmarsson wrote
But if you want to ensure that warnings is enabled, the
equivalent of using the -w switch is to give the $^W variable a
true value. Note that unlike "use warnings;", this enables
warnings dynamically, not lexically.
For modules, can I just put this after the package declaration, or
do I have to put it in each subroutine?
$^W = 1;
I was afraid you'd ask something like that...
I take for granted that you have read about $^W in "perldoc perlvar".
I *think* it's possible to just put that after the package
declaration, but at the same time I don't think it's advisable to do
so, since it might lead to enabling warnings throughout your
application, such as other modules as well.
In a CPAN module I wrote, there is only one subroutine that is called
from other packages, and there I have
local $^W = 1;
in the beginning of *that subroutine*.
I know that "Programming Perl" includes a section that describes this.
But it would be great if some of the experts on this list jumped in
and explained it better than I'm able to.
--
Gunnar Hjalmarsson
Email: http://www.gunnar.cc/cgi-bin/contact.pl
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