[luatex] Hash tokens meaning
senseiwa at gmail.com
Wed May 29 12:02:32 CEST 2013
On 5/29/13 12:32am, Reinhard Kotucha wrote:
> I fear that you have to read the TeXbook first. [...] You can
> investigate LaTeX later. [...] In short: The TeXbook is unavoidable.
As I said multiple times: I've downloaded the TeX book, and I am reading it.
> Arthur already explained that you can't compare TeX with C. C is a
> low-level language and if you disassemble a program, you can certainly
> see how it works. However, TeX is extremely complex and you don't
> achieve anything without having read the TeXbook before.
Ok, I get it. I said i *THOUGHT* I could relate it to C, and I also said
that I was obviously wrong.
> > (it's part of my job), especially when you assume that you don't
> > have the source code.
> I hope that what you do is legal and you don't end up in prison one
> day. :)
It is legal. You just don't see many do reverse engineering. I'm not 15
anymore to waste time on "cracks".
> However, the TeX source code is available and there shouldn't be a
> need to reverse engineer things. It's shipped with TeX Live.
> I just created a PDF file for you and put it on my server:
> It describes Knuth's TeX, thus no PDF or Lua related code inside.
Thanks, I have another source to read!
> BTW, I understand that you want to find out how TeX works. This is
> understandable. However, I'm convinced that the hash table is by far
> the worst starting point. I can't imagine a worse one. The hash
> table is meaningless unless you know where the entries come from and
> what they are good for.
Disclaimer: I am trying to say why I was proceeding that way.
It is quite common to make a dummy program to see how a compiler encodes
things, how symbols are translated (their names), how the code is
produced (symbol's contents). I made the same: a dummy latex, and dumped
> IMO the best approach to make TeX's internals visible is provided by
> Patrick Gundlach. His tool examines TeX's internals and uses Graphviz
> in order to display them graphically.
> I'm absolutely convinced that everything you're doing at this low
> level is absolutely useless and you waste your time unless you've read
> the TeXbook before.
You've made your point clear.
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