[luatex] Getting macro expansions from Lua
zappathustra at free.fr
Thu Jun 2 19:49:15 CEST 2011
Le 02/06/2011 12:25, Christophe Jorssen a écrit :
> 2011/6/2 Paul Isambert<zappathustra at free.fr>:
>> I wanted to try some hack with token.create/token.expand, but I found that:
>> local A = token.create("A")
>> produces an "Undefined control sequence" error. Which is all the more
>> surprising as if the token is fed to TeX in the token_filter callback, as in
>> the stupid example below, the control sequence is fine:
>> function ()
>> callback.register("token_filter", nil)
>> return token.create("A")
>> Have I misunderstood something or should I pay a visit to the bug tracker?
> I did exactly the same thing (well, the first part, I don't understand
> the second with the callback yet...) and got the same error but I felt
> ashamed of posting it here thinking I may have missed something
> trivial. So thank you Paul :-)
You're welcome. But nobody should refrain from posting here, even simple
questions (which aren't necessarily so trivial as they seem) can be
> By the way, I would highly appreciate some basic usage examples ot the
> token_filter callback and the token library.
If you're a TUG member, you can have a look at my paper in the last
Note that the example of use is pretty stupid, you can do things much
more easily with tex.print (something I realized only later in a post by
Ulrike on this list).
Anyway, I'll try to write something in the wiki, although I don't have
any convincing example of use (I haven't investigated the matter much).
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