* Intro
The official documentation for writing zsh completion functions is difficult to understand, and doesn't give many examples.
At the time of writing this document I was able to find two other tutorials on the web, however both of those tutorials only
explain a small portion of the capabilities of the completion system. This document aims to give more complete and easy to
understand explanation for creating zsh completion functions. I do not go into all the details, but will give enough information
and examples to get you up and running. If you need more details you can look it up for yourself in the [[http://zsh.sourceforge.net/Doc/Release/Completion-System.html#Completion-System][official documentation]].

Please make any scripts that you create publically available for others (e.g. by forking this repo and making a [[id:64bcd501-b0f0-48c7-b8e2-07af708b95ec][pull request]]).

** Defining completion functions
Completion functions for commands are stored in files with names beginning with an underscore _, and these files should 
be placed in a directory listed in the $fpath variable.
You can add a directory to $fpath by adding a line like this to your ~/.zshrc file: 
#+BEGIN_SRC sh 
fpath=(~/newdir $fpath)
#+END_SRC
* Utility functions with example code
** compadd
** _gnu_generic
** _arguments

** _regex_arguments
** _regex_words
** _values
** _comma_separated
* gotchas
* Putting it all together
* Other resources
[[http://wikimatze.de/writing-zsh-completion-for-padrino.html][Here]] is a nicely formatted short tutorial showing basic usage of the _arguments function, 
and [[http://www.linux-mag.com/id/1106/][here]] is a slightly more advanced tutorial using the _arguments function.
[[http://zsh.sourceforge.net/Doc/Release/Completion-System.html#Completion-System][Here]] is the zshcompsys man page.