* set_lua freezes control sequences
@ 2020-08-25 13:59 Marcel Fabian Krüger
2020-08-25 14:48 ` Hans Hagen
0 siblings, 1 reply; 3+ messages in thread
From: Marcel Fabian Krüger @ 2020-08-25 13:59 UTC (permalink / raw)
To: ConTeXt users list
Hi,
I noticed that recent LuaMetaTeX versions treats control sequences
defined using token.set_lua with `value` or `condition` as frozen and
does not allow redefining them. Given that these are not macros, we also
can't "unfreeze" them using \unletfrozen.
1. Would it be possible to add a variant of Lua value and condition
control sequences that are not frozen?
2. Also is there some way to disable the \frozen restrictions
altogether? Maybe \suppressfrozenerror?
3. I also noticed that `token.set_lua` is not affected by control
sequences being frozen. Therefore it allows redefining frozen
control sequences which seems inconsistent.
Best regards,
Marcel
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* Re: set_lua freezes control sequences
2020-08-25 13:59 set_lua freezes control sequences Marcel Fabian Krüger
@ 2020-08-25 14:48 ` Hans Hagen
2020-08-25 18:28 ` Marcel Fabian Krüger
0 siblings, 1 reply; 3+ messages in thread
From: Hans Hagen @ 2020-08-25 14:48 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 8/25/2020 3:59 PM, Marcel Fabian Krüger wrote:
> Hi,
>
> I noticed that recent LuaMetaTeX versions treats control sequences
> defined using token.set_lua with `value` or `condition` as frozen and
> does not allow redefining them. Given that these are not macros, we also
> can't "unfreeze" them using \unletfrozen.
>
> 1. Would it be possible to add a variant of Lua value and condition
> control sequences that are not frozen?
>
> 2. Also is there some way to disable the \frozen restrictions
> altogether? Maybe \suppressfrozenerror?
>
> 3. I also noticed that `token.set_lua` is not affected by control
> sequences being frozen. Therefore it allows redefining frozen
> control sequences which seems inconsistent.
It's all on purpose. Btw, these mechanisms are very experimental (and
undocumented and might to evolve).
Hans
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: set_lua freezes control sequences
2020-08-25 14:48 ` Hans Hagen
@ 2020-08-25 18:28 ` Marcel Fabian Krüger
0 siblings, 0 replies; 3+ messages in thread
From: Marcel Fabian Krüger @ 2020-08-25 18:28 UTC (permalink / raw)
To: ConTeXt users list
On Tue, Aug 25, 2020 at 04:48:27PM +0200, Hans Hagen wrote:
> > I noticed that recent LuaMetaTeX versions treats control sequences
> > defined using token.set_lua with `value` or `condition` as frozen and
> > does not allow redefining them. Given that these are not macros, we also
> > can't "unfreeze" them using \unletfrozen.
> >
> > 1. Would it be possible to add a variant of Lua value and condition
> > control sequences that are not frozen?
> >
> > 2. Also is there some way to disable the \frozen restrictions
> > altogether? Maybe \suppressfrozenerror?
> >
> > 3. I also noticed that `token.set_lua` is not affected by control
> > sequences being frozen. Therefore it allows redefining frozen
> > control sequences which seems inconsistent.
> It's all on purpose. Btw, these mechanisms are very experimental (and
> undocumented and might to evolve).
I know, but they are fun to play with. Especially the `value`
kind was one of the most important things I always missed in LuaTeX.
Marcel
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___________________________________________________________________________________
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