>> Also IIRC a perfectly valid utf-8 buffer may contain eight-bit-* chars, use
>> to keep track of valid unicode chars that have no corresponding character in
>> emacs-mule. So the presence of eight-bit-* chars does not imply that the
>> utf-8 encoded form of the text will contain an invalid utf-8 byte sequence.
> Yes, but such eight-bit-* chars can be detected by checking
> `untranslated-utf-8' property.
Sure, but the current code doesn't do that.
>> > And, if Emacs owns a unibyte string, perhaps the right thing
>> > is to make it multibyte according to the current
>> > lang. env. (by string-make-multibyte) at first, then encode
>> > it by utf-8.
>> That sounds terribly fragile/buggy.
> Then, what do you think Emacs should do in such a case?
I think we can't know what should be done, so we should strive for
simplicity and try to avoid losing information. I.e. just return the
unibyte string as-is.
Stefan
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