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Date: Sun, 7 Jun 2020 07:11:38 -0700 (PDT)
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Subject: Re: Q: discrete_subtype_definition: static only cases?
From: gautier_niouzes@hotmail.com
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Xref: reader01.eternal-september.org comp.lang.ada:59006
Date: 2020-06-07T07:11:38-07:00
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> Nonono, types in Ada are always anonymous. What you name in a *type declaration* is the *first subtype*.

OK, found the reference (3.2.1 (6)). Thanks.
So, what is declared following the keyword "type" is actually a "first subtype", right ?
Then, to summarize, whether you use the keyword "type" or "subtype", it is actually a subtype and can be dynamic (not too wysiwig, but there are surely some good reasons behind that concept).
Back to the question, the purely static cases of discrete_subtype_definition seem to be quite restricted (Niklas listed 2 cases - thanks!).