Re: how to calculate the size of string in bytes?

[Eli Zaretskii]

> Date: Tue, 18 Aug 2015 18:01:45 +0200
> Cc: help-gnu-emacs@gnu.org
> From:  <tomas@tuxteam.de>
> 
> I was thinking of "characters not expressible in UTF-8". Does Emacs have
> those?

Raw bytes come out as themselves (which might be invalid UTF-8), but
that's not a failure, that's the user's fault, because they had those
bytes in the buffer to begin with.