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From: "G.B." <bauhaus@futureapps.invalid>
Newsgroups: comp.lang.ada
Subject: Re: Bug in Ada - Latin 1 is not a subset of UTF-8
Date: Tue, 18 Oct 2016 10:23:34 +0200
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Date: 2016-10-18T10:23:34+02:00
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On 18.10.16 09:41, Dmitry A. Kazakov wrote:
> On 18/10/2016 01:25, G.B. wrote:
>> On 17.10.16 22:18, Lucretia wrote:
>
>> According to ISO 10646, UTF stands for UCS Transformation
>> Format. So, it's a format, suggesting a representation.
>>
>> On similar grounds, one could define a string subtype for
>> other types of objects, for example
>>
>>   subtype Number_String is String;
>
> You are wrong.

The constraints on either UTF_String or or Number_String are
not expressible as simple Ada subtypes. They are given by
description and normative reference, respectively.