PAD, a text adventure language written in D

[Robert Clipsham]

downs wrote:
> This was originally created for my IRC bot, but I added a CGI interface a few days ago.
> 
> Here's a quick demo: http://demented.no-ip.org/~feep/pad_test.cgi?prev=eJzLL0jNU8goKSmw0tcvSCwuSU3KzNNLzs%2FVzzVKtky0MDFJBQDYDgu%2B
> 
> It takes pastebin.com/ca/paste.dprogramming.com pages, Dokuwiki pages and raw text. For other sites, you have to wrap the code between %PAD START% and %PAD END%.
> 
> Source is on http://dsource.org/projects/scrapple/browser/trunk/idc/pad
> 
> The source is a simplicist imperative language based around the concept of scopes.
> 
> A scope is a named entity that contains other scopes or commands in a defined order. It can also have a value. Scopes unify functions and variables in a single concept.
> 
> Evaluating a scope evaluates all contained commands in order, unless it has a "default" scope, in which case that is evaluated instead.
> 
> "area scopes", scopes prepended with "area", form the rooms of the game. The player is always in a "current room", accessible via the keyword 'location'.
> 
> "hidden scopes", prepended with "#", cannot be accessed by the user directly.
> 
> "global scopes", prepended with global, when included below the root scope are always accessible by the player regardless of other lookup rules. "inventory" is a typical global scope.
> 
> Most of the commands _should_ (well, might) be self-explanatory. Have fun, and feel free to ask back.

This looks pretty cool. The language seems pretty self explanatory, do 
you have a small tutorial I could read? (or alternatively a version of 
what you pasted above with comments) Saves me figuring it out myself, 
feeling rather lazy right now ;)