From: Wolfgang Schuster <schuster.wolfgang@googlemail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Escaping in LuaTeX
Date: Sun, 2 Jan 2011 09:30:43 +0100 [thread overview]
Message-ID: <B2C0F1F2-E9A1-441F-B79F-8BF4205B8E12@gmail.com> (raw)
In-Reply-To: <201101020205.04285.Yota_VGA@tiscali.it>
Am 02.01.2011 um 02:04 schrieb Fulvio Satta:
> I have a problem with Lua and the "#" operator.
> If I execute the following code I receive an error.
>
> \def\luacode%
> {\startluacode
> local t = {1, 2, 3}
> tex.print(#t)
> \stopluacode}
>
> \starttext
> \luacode
> \stoptext
>
> ConTeXt give me the message:
>
> ! Illegal parameter number in definition of \luacode.
> <to be read again>
> t
> l.4 tex.print(#t
> )
>
> And if I execute the "H" command I get:
>
> You meant to type ## instead of #, right?
> Or maybe a } was forgotten somewhere earlier, and things
> are all screwed up? I''m going to assume that you meant ##.
>
> I've tryed with ##t, whit \#t, with \string#t, with \ctxlua instread of
> \startluacode and \stopluacode, and I've obtained some other errors, but
> ConTeXt always give me an error.
>
> Maybe should I escape in another manner the "#" operator?
You can replace the # with \letterhash but you method is wrong, the first thing is that
\luacode is already defined in the core and it can be used as replacement for \ctxlua
and second it’s better to separate a lua function and the call to the function.
Instead of writing the function in a luacode environment you can also put it
in a external file which is then loaded in your document/module. You should
also use a namespace for your functions.
\startluacode
userdata = userdata or { }
userdata.fulvio = userdata.fulvio or { }
function userdata.fulvio.size()
local t = {1, 2, 3}
tex.print(#t)
end
\stopluacode
\def\SizeOne{\ctxlua {userdata.fulvio.size()}}
\def\SizeTwo{\luacode{userdata.fulvio.size()}}
\starttext
\startluacode
local t = {1, 2, 3}
tex.print(#t)
\stopluacode
\starttabulate
\NC ctxlua \EQ \SizeOne \NC\NR
\NC luacode \EQ \SizeTwo \NC\NR
\stoptabulate
\stoptext
Wolfgang
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
next prev parent reply other threads:[~2011-01-02 8:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-02 1:04 Fulvio Satta
2011-01-02 8:30 ` Wolfgang Schuster [this message]
2011-01-02 12:27 ` Fulvio Satta
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=B2C0F1F2-E9A1-441F-B79F-8BF4205B8E12@gmail.com \
--to=schuster.wolfgang@googlemail.com \
--cc=ntg-context@ntg.nl \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).