in reply to How do I bury some code ?

I'd like to come up with using WordExposed::LanguagesPrivate::French; and WordExposed::LanguagesPrivate::Italian; only in Languages.pm, so that I can simply put use WordExposed::Languages; in Word.pm and bury everything within Languages.pm.

I hope this example is clear enough. Thanks for suggestions.

Sorry, but your example is not at all clear. Currently you're not using the modules WordExposed::LanguagesPrivate::French and WordExposed::LanguagesPrivate::Italian at all. That makes it hard to come up with suggestions how to fit them in because we don't know their intended function.

I notice that you are combining function exportation with an overall OO approach. That can occasionally make sense, but it isn't the norm. Do you have a particular reason for that approach?

Anno

Replies are listed 'Best First'.
Re^2: How do I bury some code ?
by rbi (Monk) on Aug 31, 2007 at 14:04 UTC
    Sorry. I meant that the above works only if I put use WordExposed::LanguagesPrivate::French; and use WordExposed::LanguagesPrivate::Italian; in Word.pm, while I'd like to put those two instructions in Languages.pm only
    # Word.pm
package Word;
use strict;

use Class::Struct;
use WordExposed::Languages;
use WordExposed::LanguagesPrivate::French;    # IT WORKS
use WordExposed::LanguagesPrivate::Italian;   # IT WORKS

struct Word => {
    english      => '$',
    language     => '$',
    translation  => '$',
};

sub set {
    my $self = shift();
    my $english = shift();
    my $language = shift();
    $self->english($english);
    $self->language($language);
    $self->_translate();
}
1;

    [download]
    My idea is to separate the bunch of methods I have around for a given structure into some different modules/files, without having to refer to all of them in the Module that defines the structure (Word.pm above). In such a way that only Languages.pm deals with Fench.pm and Italian.pm and I only have to make changes to Languages.pm if I want to add - say - German.pm

    I thought that the above is the only way to make available the translate() method to the Word structure, if it is defined in another file. I understand it is not :)
[reply]
[d/l]
[select]
      It seems to me you're missing out on inheritance. Make Word a subclass of WordExposed::Languages. Then methods that are defined in  WordExposed::Languages become callable through Word objects. In particular: 
      # Word.pm
package Word;
use strict;
use base 'WordExposed::Languages';

use Class::Struct;
# etc

      [download]
      should allow you to relegate use WordExposed::LanguagesPrivate::French; etc. to WordExposed::Languages

      The _translate method (presumably defined in  WordExposed::Languages) should then respond to Word objects.

      Anno

[reply]
[d/l]
[select]
        If I don't use Class:Struct it works the way I want (as in the following code). Here ./Word.pm only "knows" about ./WordExposed/Languages.pm.
        I cannot get something similar with structures.
        
# ./foo.pl 
use strict;
use warnings;

use lib ('/path_to_Word_pm');
use Word;

my $word = Word->new();
$word->set('apple','it');

# ./Word.pm
package Word;

use strict;
use warnings;
use base 'WordExposed::Languages';

sub new {
    my $class = shift;
    my $self  = {};
    bless($self, $class);
    return $self;
}
sub set {
    my $self = shift();
    my $english = shift();
    my $language = shift();
    $self->{english} = $english;
    $self->{language} = $language;
    $self->_translate();
}
1;

# ./WordExposed/Languages.pm
package WordExposed::Languages;

use WordExposed::LanguagesPrivate::French;
use WordExposed::LanguagesPrivate::Italian;

sub _translate {
    my $self = shift();
    if ($self->{language} eq 'fr') {
        $self->_traduction();
    } elsif ($self->{language} eq 'it') {
        $self->_traduzione();
    }
}

1;

# ./WordExposed/LanguagesPrivate/French.pm
package WordExposed::LanguagesPrivate::French;

our @ISA       = qw(Exporter);
our @EXPORT    = qw( _traducion );
our @EXPORT_OK = qw();

sub _traducion {
    my $self = shift();
    warn 'pomme' if ($self->{english} eq 'apple');
}
1;

# ./WordExposed/LanguagesPrivate/Italian.pm
package WordExposed::LanguagesPrivate::Italian;

our @ISA       = qw(Exporter);
our @EXPORT    = qw( _traduzione );
our @EXPORT_OK = qw();

sub _traduzione {
    my $self = shift();
    warn 'mela' if ($self->{english} eq 'apple');
}
1;

        [download]
[reply]
[d/l]

In Section Seekers of Perl Wisdom