Registry, Exporter and namespaces

["Narins, Josh" <jo...@lehman.com>]

I'm using Apache::Registry with Exporter.pm in a mod_perl, not trivially
small, environment.

I only use EXPORT_OK, no EXPORT.

I'm wondering about the following situation.

package Foo export_oks "random_fn"
package Bar export_oks "random_fn"

Script foo.pl has line "use Foo qw(random_fn); use Bar();"

Script bar.pl has line "use Bar qw(random_fn); use Foo ();"

It's been suggested to me that bar.pl might actually use &Foo::random_fn
unless it fully qualifies calls to random_fn. 

Thank you,

-Josh Narins



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Re: Registry, Exporter and namespaces

[Paul Lindner <li...@inuus.com>]

On Wed, Jan 16, 2002 at 03:10:27PM -0500, Narins, Josh wrote:
> I'm using Apache::Registry with Exporter.pm in a mod_perl, not trivially
> small, environment.
> 
> I only use EXPORT_OK, no EXPORT.
> 
> I'm wondering about the following situation.
> 
> package Foo export_oks "random_fn"
> package Bar export_oks "random_fn"
> 
> Script foo.pl has line "use Foo qw(random_fn); use Bar();"
> 
> Script bar.pl has line "use Bar qw(random_fn); use Foo ();"
> 
> It's been suggested to me that bar.pl might actually use &Foo::random_fn
> unless it fully qualifies calls to random_fn.

I've not seen this behavior myself..  Consider writing a simple set of
modules to test your hypothesis...

I would avoid using Exported symbols for your own modules if you can
help it.  Each exported symbol uses ~100-120 bytes of storage in each
module that uses it.  This can add up to a considerable amount of
memory..

-- 
Paul Lindner    lindner@inuus.com   ||||| | | | |  |  |  |   |   |

    mod_perl Developer's Cookbook   http://www.modperlcookbook.org
         Human Rights Declaration   http://www.unhchr.ch/udhr/index.htm

Re: Registry, Exporter and namespaces

[___cliff rayman___ <cl...@genwax.com>]

"Narins, Josh" wrote:

> I'm using Apache::Registry with Exporter.pm in a mod_perl, not trivially
> small, environment.
>
> I only use EXPORT_OK, no EXPORT.
>
> I'm wondering about the following situation.
>
> package Foo export_oks "random_fn"
> package Bar export_oks "random_fn"
>
> Script foo.pl has line "use Foo qw(random_fn); use Bar();"
>
> Script bar.pl has line "use Bar qw(random_fn); use Foo ();"
>
> It's been suggested to me that bar.pl might actually use &Foo::random_fn
> unless it fully qualifies calls to random_fn.
>

that would be a pretty major bug in perl wouldn't it?  using variables from a
package that did not export them, and where you explicitly did not IMPORT them
would be a major problem IMHO.

--
___cliff rayman___cliff@genwax.com___http://www.genwax.com/