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From: Florian Weimer <fw@deneb.enyo.de>
Newsgroups: comp.lang.ada
Subject: Re: Exclusive file access
Date: Sun, 30 Aug 2015 13:35:16 +0200
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Date: 2015-08-30T13:35:16+02:00
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* Dmitry A. Kazakov:

> No, I meant Wide_Wide_String.
>
> Ada's Wide_String is legally UCS-2. Windows is UTF-16. The only full
> Unicode string type is Wide_Wide_String. For an Indo-European language
> there is no difference, of course.

GNAT's Wide_String should be compatible with UTF-16.  Wide_Wide_String
definitely is not.

> Under Linux most applications simply ignore Ada standard and use String
> encoded in UTF-8. I suppose that under Linux GNAT calmly passes String file
> names as-is, i.e. as UTF-8 [*].

I think GNAT just passes around bytes, it does not care if it's UTF-8
or a legacy encoding.  As long as you don't use Wide_String—if you do
use that, things get rather messy.