Hi Monks!

I'm racking my brain with this one and can't seem to find an elegant solution. I hope you can help!

Basically i have a series of classes and subclasses, each level adding a bit more functionality to its parent and in each class i have behaviour which can be modified by configuration options which are specific to that class

All pretty straight forward so far. I can have a class method which sets the values of a hash which can be accessed by each object.

However, how do i have default values for my configuration options (written into the class)? Which can be added to in each subsequent class?

For example (Pseudo Code):

package base;

my %cfg=(
         on_error => "exit",
         output_type => "text",
        );

sub new {
  ..blah blah..
  do_something if ($cfg{on_error} eq 'exit');
}

package child;
use parent "base";

my %cfg=(
         on_error => "warn",
        );

sub new {...}

[download]

Where in the above example, the child class has the default value for "output_type" inherited from the parent class, but can change configuration options too

I've set off in the direction of having a config class singleton which is instantiated (referenced) from within the child classes but i can't fathom how to give it default values in the manner above

Thanks in advance for any help!

In reply to Inheritable configuration options.... but with default values? by Amblikai

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