[Dev-luatex] Getting all Symbols

Hans Hagen pragma at wxs.nl
Mon Jun 11 20:43:27 CEST 2012


On 11-6-2012 15:10, Sensei wrote:
> Hi all,
>
> I've posted this question to comp.text.tex, and they've suggested to
> take a look at LuaTeX. So I forwarded the message to the User mailing
> list, but probably this one is more appropriate. If not, excuse me!
>
> 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.

a matter of reading the manual .. (or using context) ...

     local list = { }

     for name, _ in pairs(tex.hashtokens()) do
         if string.find(name,"^[a-zA-Z]+$") then
             list[#list+1] = name
         end
     end

     table.sort(list)

     print(table.serialize(list))

Hans

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