Re: Disambiguate modeline character for UTF-8?

[Ulrich Mueller]

>>>>> On Fri, 07 Jul 2023, Po Lu wrote:

> Ulrich Mueller <ulm@gentoo.org> writes:
>> Which isn't Unicode but only a subset, so it's reasonable that it has
>> a different mnemonic.

> Why?  Most of the characters users will want to save in a Unicode
> document will be part of the BMP.  If it turns out that a character is
> not representable, Emacs will ask the user to select a better coding
> system upon trying to save the file.

Do you agree that the character repertoire that can be encoded by UTF-7
is not identical to the one that can be encoded by UTF-8 or UTF-16?

> Not that I expect this to happen in practice anyway, since UTF-7 is
> rarely encountered nowadays.

Yes, and when users encounter that rare case, they should get an
indication that the file they are visiting is in an unusual encoding.