Here's a pattern I've used many timess successfully in the past:

• Force all parsers to use a specified namespace (e.g., EP::Parser::Soemthing)
• In your main class (e.g., EP::Parser) have a routine that runs at 'use' or 'require' time that use something like Module::Find to find all modules in the specified namespace.
• Iterate through the modules and 'require' each of them

Since this runs whenever the module is loaded it will complain at startup if one of the implementations is incorrect.

For another layer of abstraction you can combine the above with use of Class::Factory as the parent class and associating each of the implementations with a simple name rather than a class name.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.