A couple of things are going on here.

The result is that when you first use Bozo, go_bozo gets compiled into the current package and the implicit call to import (normally handled by Exporter) does nothing. The second time, the file isn't actually compiled again, and there's still no import, so the sub doesn't get loaded to the new package space, either.

Here's how I'd write them:

package Bozo;                    # make it a package

use strict;
use warnings;

use base 'Exporter';             # subclassing with "base"
our @EXPORT = qw( go_bozo );     # "our" not "my"

sub go_bozo {
    return "BOZO!\n"
}

1;

[download]
package Foo;

use strict;
use warnings;

use Bozo;

sub Foo {
    return go_bozo()
}

1;

[download]
#!/usr/bin/perl

use strict;
use warnings;

use lib '.';

use Bozo;
use Foo;

print go_bozo();

print Foo->Foo();

[download]

Note that I've shifted the use lib just to the top level and did some minor rearranging. The real change is in Bozo.pm in how Exporter is used.

-xdg

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In reply to Re: "use Foo.pm" twice from inside different packages... by xdg
in thread "use Foo.pm" twice from inside different packages... by wazoox

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