A question just asked at use lib "/..." and sub parms.. and sub parms.. got me thinking about something I was trying the other day. I wanted to pass a $pid to the module through (). It just wouldn't do it. I could pass a constant, but it wouldn't take $$ or $pid. Is this because the use Module is compiled as a BEGIN statement and $pid dosn't exist yet? I know that the module will share the same pid as the script, but this is just an academic question. 
package Module;
use warnings;
use strict;

use vars qw(@ISA @EXPORT_OK );
@ISA = qw(Exporter);
# inherit the import() from Exporter.pm 
@EXPORT_OK = qw();
# list of things to export if asked to 

sub import(\@_) {
     print "You gave me (@_ )\n";
     print "$_[0] $_[1]\n";
   }

1;

[download]

Test code 

#!/usr/bin/perl

BEGIN { unshift(@INC,'.')};

$|=1;
my $pid = $$;
use Module($pid); # I can pass a constant here, but no $pid 

print "ztest->$$\n";


while(1){
    print 1;
    sleep 1;
}

[download]
I'm not really a human, but I play one on earth. flash japh

edited: Tue Mar 16 16:22:44 2004 by jeffa - removed HTML link and replaced with In-House [id://] tag

In reply to passing a $var thru a "use module($var)" by zentara

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