in reply to Re: Creating dynamic parent/child relationships
in thread Creating dynamic parent/child relationships

OK, I think I see what you are saying. So essentially, my Base class does the following when the "do" method is called on it: 

package Base;

use One;
use Two;
use Three;

sub do {
  print "hi from Base\n";
  Three::do;
  Two::do;
  One::do;
}

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And my config file would determine which order to run the subroutines from each of the packages. Is that right?

UPDATE: Here is a version of the code above that is a bit more dynamic: 

package Base ;

use One;
use Two;
use Three;

sub new {
  my $class = shift;
  bless { steps => [ qw(Three Two One) ] }, $class;
}

sub do {
  my $s = shift;
  print "hi from Base\n";
  for my $step ( @{ $s->{steps} }  ) {
    $step->do;
  }
}

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So I think I got it from here. I just have to dynamically import the correct modules and populate the steps attribute with the config file during construction. Nice trick. Thanks!

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Re^3: Creating dynamic parent/child relationships
by nysus (Parson) on Sep 03, 2019 at 18:35 UTC

    Just a quick follow up to show a crude way of getting this done by passing the order of the classes into the base class: 

    package Base ;

sub new {
  my $class = shift;
  for my $mod (@_) {
    eval "require $mod";
  }
  bless { steps => \@_  }, $class;
}

sub do {
  my $s = shift;
  print "hi from Base\n";
  for my $step ( @{ $s->{steps} }  ) {
    $step->do;
  }
}

    [download]

    Then call construct new from a script: 

    my $base = Base->new( qw ( One Three Two ) );
$base->do;

    [download]

    $PM = "Perl Monk's";
    $MCF = "Most Clueless Friar Abbot Bishop Pontiff Deacon Curate Priest Vicar";
    $nysus = $PM . ' ' . $MCF;
    Click here if you love Perl Monks

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