How does Lingua::tlhInganHol::yIghun work?

[Logicus]

Ok, this is way out of my league, but surely if it's possible to make perl understand this :

use Lingua::tlhInganHol::yIghun;
        
        <<'u' nuqneH!\n>> tIghItlh!
         
        {
                wa' yIQong!
                Dotlh 'oH yIHoH yInob 
                        qoj <mIw Sambe'> 'oH yIHegh jay'!
                <Qapla'!\n> yIghItlh!
        } jaghmey tIqel!

Then it follows that it is also possible to make Perl understand this :

#!/usr/bin/perl

use Modern::Perl;
use aXML::Perl;

<use>actions/<qd>action</qd>/body.aXML</use>

I want to learn how to make this happen. I will do all the leg work, I'm not asking for anyone to do my work for me, but as it stands I have no idea how to effect the workings of Perl as deeply as this, so my question my dear monks, is where do I start on the path to making the above a reality for myself and for anyone else that wants to use it?

My ambition is to make the aXML::Perl module do everything that is needed to make a comfortable development environment for building up systems within; including persistent database connection, automatic handling of query data, session management, and all the other goodies that make life easy once established. Such that the remainder of the site can be built out of aXML markup files and Perl plugin definition files which extend the aXML tagset Perl understands.

[Anonymous Monk]

I want to learn how to make this happen

I guess in all your years of experience you never heard Use The Source Luke

[Anonymous Monk]

Start by dissecting Markup::Perl and PLP. Then gain some years of experience and realise that writing programs that way is not a particularly smart thing to do: Separation of concerns

[bluescreen]

The module Lingua::tlhInganHol::yIghun is using Filter::Simple basically all that module does set up callback a function (FILTER) for a module ( let's say MyLingua ) and that function is called when a piece of code uses MyLingua. If you read the source code of Lingua::tlhInganHol::yIghun you'll see a big FILTER function with the contents of the parser. The parser transforms Klingon into Perl.

[kejohm]

See perlfilter for info on source filters, as well as Filter::Simple (as mentioned by bluescreen above) for a simple way to create source filters, and Filter::Util::Call for a not-so-simple way.