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Re: Cwd::cwd() bug??? on Cygwin


On 11/21/2003 4:03 PM, Nick Ing-Simmons wrote:
Nick Ing-Simmons <nick.ing-simmons@elixent.com> writes:

package MyModule;
use Module;
use base 'Module';
use Cwd;

If you moved that above the use Module line then when Module.pm was compiled it would know Cwd::cwd was a function.


Sorry I could not see wood for the trees!

What is happening is that in MyModule you 'use Cwd',
which EXPORTS 'cwd' by default - so now there is a MyModule::cwd
which is a legitimate over-ride of base class's version so...

You call MyModule->new which inherits from Module->new - so far so good.
But then Module::new calls MyModule->cwd which is the imported one.
So fix is:


package MyModule;
use Module;
use base 'Module';
use Cwd ();    # No imports!

Alternatively Module's new could do

sub new {
my $p = shift;
Module->cwd; # ignore override by derived class. }


But that rather spoils it as a base class.


Ok, both of these work. I see now where I was flawed in understanding this one.


Many thanks to Nick, Adi, and Yitzchak (May I ask how to pronounce your name?) for the explanations and solutions.

BTW, strictly speaknig, wouldn't this still be considered a bug, since the behaviour difers depending on platform.

--
A little learning is a dang'rous thing;
Drink deep, or taste not the Pierian spring;
There shallow draughts intoxicate the brain;
And drinking largely sobers us again.
                - Alexander Pope


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