# [NTG-context] Using lua to define a macro with one optional parameter in brackets

Jaroslav Hajtmar hajtmar at gyza.cz
Thu Jul 9 17:05:09 CEST 2015

Thanx to Hans and Taco too,

ad Taco) ala Perhaps interfaces.definecommand could be extended with a
way to do global definitions?
Indeed it seems to me. Changes in lua code does not affect the results
in ConTeXt.

Thanx, II tried to use it, but somehow I can not realize what I wanted.
Not available somewhere a minimal example? I tried to scan codes in the
folder with the installation of ConTeXt, but I never encountered a
working example of where you could bounce.
Thanks Jaroslav Hajtmar

Dne 9. 7. 2015 v 11:07 Hans Hagen napsal(a):
> On 7/9/2015 7:22 AM, Jaroslav Hajtmar wrote:
>> Hi Hans.
>> Only for explanation of my (maybe) crazy request:
>> I can not at this level TeX macros to create, because it creates
>> automatically after opening the CSV file. Although I tried to start
>> creating something with \ csname \ endcsname etc. but my experiments
>> with this method were never successful. In addition with TeX probably I
>> can not work as well as with Lua (for things which in this case I need
>> ie. at low level). Given that I have a CSV file loaded in global
>> variables and header information at my disposal, I Lua everything you
>> need me to do what I need. The problem is that the macros created in Lua
>> I sometimes do not work as well when I create TeX (during the cycle will
>> automatically fall short values). I have a particularly bad experience
>> in this regard with the construction, he sent Taco.
>>
>> Simplified version of "interfaces.definecommand" construction does not
>> in my way of processing the results of what I expected.
>
> interfaces.setmacro("name","value")
>
>> Module which at the moment I work (in collaboration with Pablo
>> Rodriguez) at the moment is very complex and extensive, and already it
>> slowly begin to lose myself :-), so I try to get any information from
>> the conference.
>> Thank you and also to other counselors too at the conference for their
>> cooperation in solve my problems.
>>
>> Jaroslav Hajtmar
>>
>>
>>
>>
>> Dne 8. 7. 2015 v 20:54 Hans Hagen napsal(a):
>>> On 7/8/2015 4:11 PM, Jaroslav Hajtmar wrote:
>>>> Thanks Taco very much.
>>>>
>>>> At this point, it really works in simple situations, but in the event
>>>> that this solution will incorporate into the existing system, then I
>>>> have big problems with expansion (values are not updated in macros). I
>>>> need more solutions using something like context.setgvalue, or at
>>>> least
>>>> according to the following example. If they could incorporate the
>>>> remaining two definitions
>>>> ie
>>>> \def\simpleA {content when parameter is missing}
>>>> \def\complexA[#1]{parameter #1}
>>>>
>>>> into luacode (probably encounter a problem with #), so it might work.
>>>> Can not think of anyone, how it could be done differently?
>>>> Thanks Jaroslav Hajtmar
>>>>
>>>> Here is minimal example:
>>>>
>>>> \ctxlua{
>>>> xlsname='A'
>>>> content='content when parameter is missing'
>>>> context([[\definecomplexorsimple\]]..xlsname)
>>>> %context([[\def\simple]]..xlsname..[[{]]..content..[[}]])
>>>> %context([[\def\complex]]..xlsname..'[#1]'..[[{Neco: #1}]])
>>>> }
>>>>
>>>> \def\simpleA {content when parameter is missing}
>>>> \def\complexA[#1]{parameter #1}
>>>
>>> why don't you define these commands at the tex level
>>>
>>> Hans
>>>
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