Re: [NTG-context] About xstring and ConTeXt

I've tried with a wrapper and it seems to work fine. However, changing definitions "on the fly" to make xstring usable seems to break things in ConTeXt... Whatever. I guess I will have to find out other command redefinitions in ConTeXt. Thank you very much, Phelype. Jairo :) El mar., 7 de jul. de 2020 a la(s) 13:54, Phelype Oleinik ( phe.h.o1@gmail.com) escribió:

Hi Jairo,

ConTeXt's \unexpanded is e-TeX's \protected, so the error boils down to something like: \edef\x{\unexpanded{#}}, which works in Plain but not in ConTeXt.

Usually packages that claim to be generic have to cope with that. xstring would need to do (in a ConTeXt-specific loader): \let\xstring@unexpanded\normalunexpanded and \let\xstring@unexpanded\unexpanded in Plain and LaTeX loaders, then then use \xstring@unexpanded in the code. But `xstring` doesn't claim (that I found, at least) to be compatible with ConTeXt, so it's understandable: though if it is compatible with Plain, it wouldn't be hard to adapt to ConTeXt.

That said, you can load `xstring` if you do: \let\unexpanded\normalunexpanded \input xstring.tex \let\unexpanded\protected but the internals of the package will probably be comprimised by the misuse of (ConTeXt) \unexpanded.

Phelype

On Tue, Jul 7, 2020 at 3:40 PM Jairo A. del Rio wrote:

...

Reading about macro bundles meant to be generic (format agnostic), some

of them work in plain/LaTeX, but crash when loaded on ConTeXt. The following happens with xstring.tex

...

tex error > tex error on line 372 in file xstring.tex: ! Illegal

parameter number in definition of \xs_reserved_C

...

<to be read again>

1

\xs_newlines ->\unexpanded {}\xs_def \xs_arg_i {##1

}

\xs_newmacro_ ...name \xs_myarg }\edef \xs_reserved_C {\unexpanded

\expandafter {\xs_newlines

...

}\edef \noexpand \xs_call }\edef \xs_reserved_D {...

l.372 \xs_newmacro\StrRemoveBraces{}{1}{1}

{%

<empty file>

You meant to type ## instead of #, right? Or maybe a } was forgotten

somewhere

...

earlier, and things are all screwed up? I'm going to assume that you

meant ##.

...

I've tried changing the catcode regime, but with no effect.

Don't misunderstand me. I'm aware of ConTeXt capabilities and string

manipulation via Lua. My question is more like: "Why doesn't xstring.tex?"

...

Sorry if my question is outside the scope of ConTeXt

developers/maintainers. Thank you very much.

...

Jairo :)

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