Re^3: Understanding module structure and inheritance

Hi, bradcathey,

$ cat Common.pm
package Common;
use strict;
use warnings;
use Exporter;
our @ISA = qw(Exporter); # borrows import()
our @EXPORT = qw(show_here);

sub show_here { }

1;

$ cat Main.pm 
package Common;
use strict;
use warnings;
use Common;

sub show_me {}

1;
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The caller of Main.pm has direct access to show_me() and show_here() using qualified name,

Main::show_here; # since exported by default by Common.pm
Main::show_me; # originally in Main.pm
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If the caller has its own use Common then it doesn't have to qualify it, show_here() is enough.

However, if you meant that "a way to include Common.pm in Main.pm so Contact.pm can use show_here directly, then make Main.pm to reexport the function.

package Main;
....
use Exporter;
use Common;
our @ISA = qw(Exporter); # borrows import()
our @EXPORT = qw(show_here); # just @Common::Export to export 
                             # what ever Common exports.
....
sub show_me {}
1;
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The caller,

use Main;
Main::show_me();
show_here()
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Open source softwares? Share and enjoy. Make profit from them if you can. Yet, share and enjoy!

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