Re: [NTG-context] printing tab in lua: print('a\tb') fails
Mojca Miklavec wrote:
Hello,
Here's a tiny question. The following command complains about
undefined control sequence.
\starttext
\startluacode
print('a\tb')
print('a\\tb')
\stopluacode
hello
\stoptext
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
-
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Re: [NTG-context] printing tab in lua: print('a\tb') fails
On Wed, Nov 26, 2008 at 8:28 PM, Wolfgang Schuster wrote:
Am 26.11.2008 um 20:07 schrieb Mojca Miklavec:
Hello,
Here's a tiny question. The following command complains about
undefined control sequence.
\starttext
\startluacode
print('a\tb')
print('a\t b')
But then I get some unwanted space.
\stopluacode
hello
\stoptext
There is a workaround:
print(string.format('a\t%s', 'b'))
but I find it weird. Even if the line above gets commented out with
two dashes it still complains.
I understand approximately why this happens, but is that intended?
Should I be using something else than \startluacode in the plethora of
different lua triggering commands?
\start/stopluacode is defined as \startluacode#1\stopluacode
(simplified) and you should take care of TeXs parsing rules.
If you want Lua comments and format command (\n, \t ...) use
a external file for your Lua code.
OK, I will use external files next time. In this quick-and-dirty
approach I just added string.format since it was easier than
restructuring everything.
I thought that \startluacode should be behaving the same way as
verbatim environments where commands inside verbatim have no
influence, but apparently I was wrong.
Thanks,
Mojca
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Re: [NTG-context] printing tab in lua: print('a\tb') fails
OK, I will use external files next time. In this quick-and-dirty approach I just added string.format since it was easier than restructuring everything. I thought that \startluacode should be behaving the same way as verbatim environments where commands inside verbatim have no influence, but apparently I was wrong. I also think so. Can be strange, but inside a \startluacode\stopluacode I have no problems to think at -- as comment while I have problems to think to % as comment And put lua code in a separate file not always is a good solution -- luigi ___ 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 : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] printing tab in lua: print('a\tb') fails
On Thu, Nov 27, 2008 at 9:29 AM, Mojca Miklavec
[EMAIL PROTECTED] wrote:
On Wed, Nov 26, 2008 at 8:28 PM, Wolfgang Schuster wrote:
Am 26.11.2008 um 20:07 schrieb Mojca Miklavec:
Hello,
Here's a tiny question. The following command complains about
undefined control sequence.
\starttext
\startluacode
print('a\tb')
print('a\t b')
But then I get some unwanted space.
print('a\string\tb')
\stopluacode
hello
\stoptext
Wolfgang
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Re: [NTG-context] printing tab in lua: print('a\tb') fails
On Thu, Nov 27, 2008 at 9:42 AM, luigi scarso [EMAIL PROTECTED] wrote: OK, I will use external files next time. In this quick-and-dirty approach I just added string.format since it was easier than restructuring everything. I thought that \startluacode should be behaving the same way as verbatim environments where commands inside verbatim have no influence, but apparently I was wrong. I also think so. Can be strange, but inside a \startluacode\stopluacode I have no problems to think at -- as comment while I have problems to think to % as comment And put lua code in a separate file not always is a good solution This would be really great, \start/stoplua with % for comments like \ctxlua and \start/stopluacode with -- as comment, the first is used for longer settings in macros and the second for inline functions. @Luigi: You could try to parse the luacode content with Lpeg and with the result back to \directlua. 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 : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] printing tab in lua: print('a\tb') fails
On Thu, Nov 27, 2008 at 10:02 AM, Wolfgang Schuster [EMAIL PROTECTED] wrote: On Thu, Nov 27, 2008 at 9:42 AM, luigi scarso [EMAIL PROTECTED] wrote: OK, I will use external files next time. In this quick-and-dirty approach I just added string.format since it was easier than restructuring everything. I thought that \startluacode should be behaving the same way as verbatim environments where commands inside verbatim have no influence, but apparently I was wrong. I also think so. Can be strange, but inside a \startluacode\stopluacode I have no problems to think at -- as comment while I have problems to think to % as comment And put lua code in a separate file not always is a good solution This would be really great, \start/stoplua with % for comments like \ctxlua and \start/stopluacode with -- as comment, the first is used for longer settings in macros and the second for inline functions. @Luigi: You could try to parse the luacode content with Lpeg and with the result back to \directlua. Better to study luat-ini.tex first -- luigi ___ 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 : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] printing tab in lua: print('a\tb') fails
luigi scarso wrote:
Correction:
-- works as comments in luacode
% is used to format strings
It's a bit different: code below is ok, and TeX comment is seen before
lua comment .
Only Hello! is print on pdf
%%
\def\Foo{%
\startluacode
-- this is a lua comment
%% this is a TeX comment
\stopluacode
}
sure, since you use a \def which then stores catcodes as they are in tex
mode
\startluacode
function document.luigishouldknowbetter(whatever)
for i=1,100 do
print(whatever) -- this is a lua comment
end
end
\stopluacode
\def\Foo
{\ctxlua{document.luigishouldknowbetter(Hello world!)}}
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
-
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Re: [NTG-context] printing tab in lua: print('a\tb') fails
On Thu, Nov 27, 2008 at 1:03 PM, Hans Hagen [EMAIL PROTECTED] wrote:
luigi scarso wrote:
Correction:
-- works as comments in luacode
% is used to format strings
It's a bit different: code below is ok, and TeX comment is seen before
lua comment .
Only Hello! is print on pdf
%%
\def\Foo{%
\startluacode
-- this is a lua comment
%% this is a TeX comment
\stopluacode
}
sure, since you use a \def which then stores catcodes as they are in tex
mode
\startluacode
function document.luigishouldknowbetter(whatever)
for i=1,100 do
print(whatever) -- this is a lua comment
end
end
\stopluacode
\def\Foo
{\ctxlua{document.luigishouldknowbetter(Hello world!)}}
Exactly.
In my opinion, this is better than my example, because I don't like to mix
things (and also for namespace document).
--
luigi
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Re: [NTG-context] printing tab in lua: print('a\tb') fails
Correction:
-- works as comments in luacode
% is used to format strings
It's a bit different: code below is ok, and TeX comment is seen before lua
comment .
Only Hello! is print on pdf
%%
\def\Foo{%
\startluacode
-- this is a lua comment
%% this is a TeX comment
\stopluacode
}
\starttext
Hello !
\Foo
\stoptext
%%%
This is wrong
%%
\starttext
Hello !
\startluacode
-- this is a lua comment
%% this is a TeX comment
\stopluacode
\stoptext
%%%
! LuaTeX error main ctx instance:3: unexpected symbol near '%'.
\@@expanded ... comment
%% this is a TeX comment
}
l.6 \stopluacode
?
--
luigi
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Re: [NTG-context] printing tab in lua: print('a\tb') fails
Mojca Miklavec wrote:
I thought that \startluacode should be behaving the same way as
verbatim environments where commands inside verbatim have no
influence, but apparently I was wrong.
no, more like MPcode where one can mix things
if the luacode would not expand macros, then we'd need rather tricky
code when we'd like to have tex put stuff in there
\startluacode
print('a\string\tb')
\stopluacode
Hans
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
-
___
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 : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
Re: [NTG-context] printing tab in lua: print('a\tb') fails
Am 26.11.2008 um 20:07 schrieb Mojca Miklavec:
Hello,
Here's a tiny question. The following command complains about
undefined control sequence.
\starttext
\startluacode
print('a\tb')
print('a\t b')
\stopluacode
hello
\stoptext
There is a workaround:
print(string.format('a\t%s', 'b'))
but I find it weird. Even if the line above gets commented out with
two dashes it still complains.
I understand approximately why this happens, but is that intended?
Should I be using something else than \startluacode in the plethora of
different lua triggering commands?
\start/stopluacode is defined as \startluacode#1\stopluacode
(simplified) and you should take care of TeXs parsing rules.
If you want Lua comments and format command (\n, \t ...) use
a external file for your Lua code.
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 : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
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