bug#61726: [PATCH] Eglot: Support positionEncoding capability

[Eli Zaretskii]

> From: João Távora <joaotavora@gmail.com>
> Date: Fri, 24 Feb 2023 13:45:23 +0000
> Cc: Augusto Stoffel <arstoffel@gmail.com>, 61726@debbugs.gnu.org
> 
> On Fri, Feb 24, 2023 at 1:34 PM Eli Zaretskii <eliz@gnu.org> wrote:
> >
> > > You can't even send or receive a message through the JSONRPC channel if
> > > it's not valid UTF-8
> 
> > That's because we _decided_ to behave like that.  A decision that is
> > not carved in stone.
> 
> At least or LSP, it seems it must be UTF-8:

This is a misunderstanding: I didn't mean to say that we should send
invalid UTF-8 sequences.  I meant something else.  Quote from the rest
of my message:

> > and `json-serialize' rightfully emits an error.
> 
> There's no "rightfully" here.  It's our decision to signal an error in
> this case.  Substituting some innocent character for the unencodable
> ones would be an entirely legitimate alternative.
> [...]
> See above: replacing problematic characters would also solve this
> problem.  Some other applications out there actually behave like that.

That's the alternative: replace the unencodable character with some
replacement.

> I don't see how this is relevant to the code-point counting problem here,
> though.

It started when I said we cannot count bytes in the internal
representation of text when we need to produce UTF-8 bytes.