* Lua & \let
@ 2013-10-04 8:47 Procházka Lukáš Ing. - Pontex s. r. o.
2013-10-04 8:54 ` Hans Hagen
2013-10-04 8:55 ` Wolfgang Schuster
0 siblings, 2 replies; 4+ messages in thread
From: Procházka Lukáš Ing. - Pontex s. r. o. @ 2013-10-04 8:47 UTC (permalink / raw)
To: ConTeXt
Hello all,
how to call \let from within Lua?
I'd need to "\let\T=4" using Lua.
The following code doesn't work (not so surprisingly):
----
\startluacode
a = 4
\stopluacode
\expandafter\let\expandafter\T=\cldcontext{a}
\starttext
Test \T.
\stoptext
----
What's the correct way?
TIA.
Lukas
--
Ing. Lukáš Procházka [mailto:LPr@pontex.cz]
Pontex s. r. o. [mailto:pontex@pontex.cz] [http://www.pontex.cz]
Bezová 1658
147 14 Praha 4
Tel: +420 244 062 238
Fax: +420 244 461 038
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Lua & \let
2013-10-04 8:47 Lua & \let Procházka Lukáš Ing. - Pontex s. r. o.
@ 2013-10-04 8:54 ` Hans Hagen
2013-10-04 9:01 ` Procházka Lukáš Ing. - Pontex s. r. o.
2013-10-04 8:55 ` Wolfgang Schuster
1 sibling, 1 reply; 4+ messages in thread
From: Hans Hagen @ 2013-10-04 8:54 UTC (permalink / raw)
To: ntg-context
On 10/4/2013 10:47 AM, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
> Hello all,
>
> how to call \let from within Lua?
>
> I'd need to "\let\T=4" using Lua.
>
> The following code doesn't work (not so surprisingly):
>
> ----
> \startluacode
> a = 4
> \stopluacode
>
> \expandafter\let\expandafter\T=\cldcontext{a}
>
> \starttext
> Test \T.
> \stoptext
> ----
>
> What's the correct way?
why let and not context.setvalue("T","4")
anyway ...
\startluacode
a = 4
\stopluacode
\normalexpanded{\let\noexpand\T\cldcontext{a}}
\starttext
Test \T.
\stoptext
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 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 : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Lua & \let
2013-10-04 8:47 Lua & \let Procházka Lukáš Ing. - Pontex s. r. o.
2013-10-04 8:54 ` Hans Hagen
@ 2013-10-04 8:55 ` Wolfgang Schuster
1 sibling, 0 replies; 4+ messages in thread
From: Wolfgang Schuster @ 2013-10-04 8:55 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 04.10.2013 um 10:47 schrieb Procházka Lukáš Ing. - Pontex s. r. o. <LPr@pontex.cz>:
> Hello all,
>
> how to call \let from within Lua?
>
> I'd need to "\let\T=4" using Lua.
>
> The following code doesn't work (not so surprisingly):
>
> ----
> \startluacode
> a = 4
> \stopluacode
>
> \expandafter\let\expandafter\T=\cldcontext{a}
>
> \starttext
> Test \T.
> \stoptext
> ----
>
> What's the correct way?
You need more \expandafter because \cldcontext needs two expansion steps:
\expandafter\expandafter\expandafter\let\expandafter\expandafter\expandafter\T\expandafter\expandafter\expandafter=\cldcontext{a}
but I wonder why you don use \def or \edef:
\edef\T{\cldcontext{a}}
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Lua & \let
2013-10-04 8:54 ` Hans Hagen
@ 2013-10-04 9:01 ` Procházka Lukáš Ing. - Pontex s. r. o.
0 siblings, 0 replies; 4+ messages in thread
From: Procházka Lukáš Ing. - Pontex s. r. o. @ 2013-10-04 9:01 UTC (permalink / raw)
To: mailing list for ConTeXt users
On Fri, 04 Oct 2013 10:54:37 +0200, Hans Hagen <pragma@wxs.nl> wrote:
> On 10/4/2013 10:47 AM, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
>> Hello all,
>>
>> how to call \let from within Lua?
>>
>> I'd need to "\let\T=4" using Lua.
>>
>> The following code doesn't work (not so surprisingly):
>>
>> ----
>> \startluacode
>> a = 4
>> \stopluacode
>>
>> \expandafter\let\expandafter\T=\cldcontext{a}
>>
>> \starttext
>> Test \T.
>> \stoptext
>> ----
>>
>> What's the correct way?
>
> why let and not context.setvalue("T","4")
>
> anyway ...
>
> \startluacode
> a = 4
> \stopluacode
>
> \normalexpanded{\let\noexpand\T\cldcontext{a}}
>
> \starttext
> Test \T.
> \stoptext
> You need more \expandafter because \cldcontext needs two expansion steps:
> \expandafter\expandafter\expandafter\let\expandafter\expandafter\expandafter\T\expandafter\expandafter\expandafter=\cldcontext{a}
> but I wonder why you don use \def or \edef:
> \edef\T{\cldcontext{a}}
... OK, thank you, Hans & Wolfgang, for your responses.
Best regards
Lukas
--
Ing. Lukáš Procházka [mailto:LPr@pontex.cz]
Pontex s. r. o. [mailto:pontex@pontex.cz] [http://www.pontex.cz]
Bezová 1658
147 14 Praha 4
Tel: +420 244 062 238
Fax: +420 244 461 038
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread
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