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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: unicode and wide_text_io
Date: Thu, 28 Dec 2017 18:51:41 -0600
Organization: JSA Research & Innovation
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Date: 2017-12-28T18:51:41-06:00
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"Mehdi Saada" <00120260a@gmail.com> wrote in message 
news:023dc29b-dbc5-4fc8-b44f-d748517adec8@googlegroups.com...
...
> Myself:
>> there are positions such as Wide_Character'Val(X) doesn't correspond to 
>> the Xth character in the UNICODE standard ??
> Of course: Character'val(156) to 'val(255) are one byte long, whereas in 
> UTF8 the corresponding code points are encoded with two bytes. Did I 
> understood the lesson ?

Yup, that's right. And it depends on what the display device is handling as 
to whether UTF-8 is recognized. If you don't include Dmitry's chcp command 
on Windows, most likely his program will output garbage. (On my computer, 
the default code page is 437, which certainly won't display UTF-8 strings!)

                                          Randy.