[luatex] Getting all symbols

[Sensei]

Hi all,

I've posted this question to comp.text.tex, and they've suggested to 
take a look at LuaTeX. So here it goes!

I'm trying to find *at runtime* all the symbols allowed in a latex 
environment. So, given a tex file, I'd like to access
- the complete predefined commands/symbols/definitions;
- the complete list of commands/symbols/definitions defined in packages.

So, the predefined language list would include \LaTeX, \def, 
\newcommand, ~, \usepackage, and so on. I've been informed that this is 
a naive view, since there are lots of other commands such as \@ and 
similars, and a simple match with a \ would be unrealistic (e.g., 
anything beginning with a \ is a command).

When including a package, for example graphicx, I expect to find a way 
to have \includegraphics and its siblings. Again, packages may mess up a 
little bit.

The best would be having commands along with their options, but I don't 
know if this is possible.

One thing I'd like to avoid: creating my own parser. Why on earth should 
I create a parser when latex knows more than me (or everyone else) what 
symbols and commands it knows?

The suggestions from the newsgroup is that *maybe* LuaTeX gives a way to 
access all TeX's macro hash table. If so, I'd be really happy.


Am I looking in the wrong place?


Thanks & Cheers!