Re: [NTG-context] TeX capacity exceeded - in Lua block - why?

On 7/16/2015 12:13 PM, Procházka Lukáš Ing. - Pontex s. r. o. wrote:

Hello,

On Thu, 16 Jul 2015 11:03:05 +0200, luigi scarso wrote:

...

\def\GG{\ifmmode G_G\else$\GG$\fi} means "define the macro \GG as G_G if mmmod is true, else as \GG " It's clear that you always are in a situation where mmod is true, then \GG is replaced with G_G

Well, I intended "replaced with $G_G$", not "replaced with G_G"; so I thought this would force/ensure math mode and thus prevent infinite recursion.

...

but as soon as you fall into "mmod not true" then you have infinite recursion.

Also, my observation was that my original macro worked well when called for TeX code (at various places of use: \GG $\GG$ \startitemize[][] \sym{\GG} \GG \sym{$\GG$} $\GG$ \sym{\m{\GG}} \m{\GG} \item End \stopitemize ) but stopped working when called from Lua (?!).

it all depends ... if you pass it in a way that it gets expanded you get already expansion at the write you could try \unexpanded\def\GG then it's hard to say what happens unless one sees the whole application (for which i have no time anyway)

@Hans:

This seems to be best solution - exactly what I wanted to achieve: \def\GG{\mathematics{G_G}}.

Thanks both for your help.

Best ragrds,

Lukas

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