Work around AMS book unicode issue?

[Jean-Marc Lasgouttes]

Le 10/01/2023 à 03:42, Scott Kostyshak a écrit :
> The attached patch works around an AMS book unicode issue, as discussed here:
> 
>    https://tex.stackexchange.com/questions/671116/how-to-find-and-fix-the-origin-of-invalid-unicode-character-generated-by-lyx
> 
> Disadvantage of the workaround is the added dependency, textcase.sty, which is not needed for AMS book documents without unicode. If this is a problem, I suppose we could add a new layout flag that, if activated, loads textcase if there is unicode.
> 
> Attached is an example .lyx file that does not compile without the patch and does compile with the patch.
> 
> Thoughts?

Since this is not needed with latest LaTeX, I'd suggest maybe a 
"Requires makeuppercase" that triggers code checking whether 
textcase.sty may be needed. (we can do that, right?)

Is this only an amsbook issue? What about book.cls?

> By the way, should the "amsbook" dependency in \DeclareLaTeXClass be there regardless of this patch?

AFAIR, this is the default when no dependency is given (require 
layoutname.cls)

JMarc