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[Giovanni Piredda <address@hidden>]

On 17.11.20 22:32, Massimiliano Gubinelli wrote:
> Dear Giovanni,
>
> > On 17. Nov 2020, at 19:25, Giovanni Piredda <address@hidden> wrote:
> >
> >
> > I have defined a Scheme function with the following:
> >
> > (tm-define (unitSpacer) ; default, will be used in regular text
> >         `(hspace "0.5spc"))
> > (tm-define (unitSpacer)
> >         (:require (in-math?))
> >         "*")
> >
> > As far as I understand, the first definition is the default and it is 
> > overridden by the second when I am in math.
> >
> > In my tests, this happens only in open documents. At the first opening of a 
> > document, only the first definition is used. Does anyone have a hint on what 
> > is happening? Developers ;-) ?
> You should give more info. In which sense the macros "are used"? Scheme 
> macros can be evaluated in two ways, essentially: either due to input from the user 
> (e.g. keypress) or because you put some \extern markup in the document and TeXmacs is 
> typesetting it, in particular evaluating the markup language and arrives to your macro.
>
> I think scheme code in \extern markup is evaluated every time is needed, you 
> do not have much control of that.
>
> Can you explain how you use those macros?
Hi Max,

I call them inside an \extern primitive ( from the .tm source, 
<assign|SI|<xmacro|input|<extern|SIScheme|<quote-arg|input>>>>)

The code you wrote

(concat (text "a") "*" (text "b"))

works for me too, and it works even if I modify it with the (with 
"math-font-shape" ...) . I will investigate more and write again 
(hopefully with the solution).