Wouldn't it be slow for larger documents? I will try anyway. By the way,
I've seen Lua(La)TeX users recurring to callbacks (process input buffer) to
make string replacements and I've done so myself sometimes. Does ConTeXt do
preprocessing the same way or is a better alternative possible? Thank you
very much.

Jairo :)

El lun., 29 de jun. de 2020 a la(s) 02:50, luigi scarso (
luigi.scarso@gmail.com) escribió:

>
>
> On Sun, Jun 28, 2020 at 10:48 PM Jairo A. del Rio <jairoadelrio6@gmail.com>
> wrote:
>
>> I've read the following is not possible in TeX
>>
>> \def#1\macro{blabla#1}
>>
>> where arguments come before. The only partial exceptions are commands
>> like \atop or \over, which are in fact primitives. Is there a way to do
>> this in ConTeXt?
>>
>>
> you can build a lpeg and parse the your "extended tex" source, obtaining a
> valid tex source.
>
>
> --
> luigi
>
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