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Re^2: How relevant is the order of 'use's ?

by Krambambuli (Curate)
on Oct 20, 2016 at 13:58 UTC ( [id://1174365]=note: print w/replies, xml ) Need Help??


in reply to Re: How relevant is the order of 'use's ?
in thread How relevant is the order of 'use's ?

yesss.... Your response, as well the previous one, gave the right direction.

The defined import function is *not* OK. Replacing it with something closer to what Exporter does seems to solve the problem: 
package Demo2;

sub import {
    #${[caller]->[0].'::'}{$_} = ${__PACKAGE__."::"}{$_}
    *{[caller]->[0].'::'.$_} = \&{__PACKAGE__."::$_"}
        foreach grep { not /^(ISA|isa|BEGIN|import|Dumper)$/ } 
                      keys %{__PACKAGE__."::"};
}

use constant { 
    SUCCESS                          => 0,
};

1;

[download]
Now I just have to understand how come that it works :)

Replies are listed 'Best First'.
Re^3: How relevant is the order of 'use's ?
by Eily (Monsignor) on Oct 20, 2016 at 14:27 UTC

    Actually I think you can do even simpler/easier to read: 

    use Exporter;
use base qw/Exporter/;
our %constants;

BEGIN {
  push @ISA, 'EXPORTER';
  %constants = (SUCCESS => 1);
  @EXPORT = map "&$_", keys %constants;
}

use constant \%constants;

    [download]
    Since I guess your goal is to export all the constants in Demo2 without having to provide the list of names twice. And with the & appended to each name, there's no risk of overwriting $SUCCESS;

[reply]
[d/l]

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