[luatex] Inspecting TeX tokens from a Lua REPL

[luigi scarso]

On Wed, Jan 16, 2019 at 7:35 PM Eduardo Ochs <eduardoochs at gmail.com> wrote:

> Hi list,
>
> I am not sure if this is the right place to ask open-ended questions,
> but let me try.
>
> I wrote a package called Dednat6 - here:
>
>   http://angg.twu.net/LATEX/2018tugboat-rev1.pdf (TUGBoat article)
>   http://angg.twu.net/LATEX/2018dednat6-extras.pdf (extra features/docs)
>   http://angg.twu.net/dednat6.zip (zip file)
>   http://angg.twu.net/dednat6.html (home page)
>
> and it includes a nice Lua REPL. If we run this,
>
>   rm -Rfv /tmp/dn6-test/
>   mkdir   /tmp/dn6-test/
>   cd      /tmp/dn6-test/
>   wget http://angg.twu.net/dednat6.zip
>   unzip dednat6.zip
>   lualatex 2018dednat6-repl.tex
>
> we enter the REPL in the middle of the compilation of a document; more
> precisely, in this context:
>
>   \documentclass{article}
>   \begin{document}
>     \catcode`\^^J=10
>     \directlua{dofile "dednat6load.lua"}
>     \directlua{luarepl()}
>
> which means that we can use the REPL to inspect, *from Lua*, the
> current definitions and macros - for example, the current definitions
> for \section and \subsection. I am just beginning to play with this
> idea, writing code that uses the these functions from the token
> library (section 9.6 in the LuaTeX reference manual),
>
>   token.create(...)
>   token.get_macro(...)
>   token.get_meaning(...)
>
> and inspecting the fields "command", "cmdname", "csname", "id",
> "active", "expandable", "protected" of token objects... clearly I
> haven't gone very far.
>
> What tools do you people use to inspect \defs from Lua? Where do you
> suggest me to look? Any suggestions of packages, articles (in TUGBoat
> or elsewhere), webpages, code, comments in source code?...
>
> Thanks in advance!
>   Eduardo Ochs
>   http://angg.twu.net/math-b.html
>
>
>
> P.S.: this question is connected to the one in this thread -
> http://tug.org/pipermail/luatex/2018-January/006736.html - but I know
> much more now...
>
> cool.. thank you very much for your links !

-- 
luigi
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