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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Strange crash on custom iterator
Date: Wed, 4 Jul 2018 09:53:54 +0200
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Xref: reader02.eternal-september.org comp.lang.ada:53563
Date: 2018-07-04T09:53:54+02:00
List-Id: <comp.lang.ada>

On 2018-07-04 09:33, J-P. Rosen wrote:
> Le 03/07/2018 à 18:36, Dmitry A. Kazakov a écrit :
>> E.g. UTF8_String and String must share interfaces but have different
>> representations.
> No. UTF_8 is useful only for IOs, as soon as you want to use a UTF
> string, you need to convert it to a Wide_String.

I cannot. Wide_String is UCS-2 which is not full Unicode.

Anyway, whatever conversion of representations needed it must be 
transparent to the user.

> Why? Because even the simplest operation (Length, Indexing) are O(N) and
> are mostly equivalent to decoding the whole string.

Premature optimization, huh? And you still need UTF-8 string type even 
if you are going to convert it to something else. Back to the square 
one, how to design an UTF-8 string type?

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de