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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: How to write "Hello" to a text file without a line terminator
Date: Sun, 14 Aug 2016 14:54:06 +0100
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Date: 2016-08-14T14:54:06+01:00
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AdaMagica <christ-usch.grein@t-online.de> writes:

> Am Sonntag, 14. August 2016 10:30:15 UTC+2 schrieb Simon Wright:
>> Come to think of it, what would the use case be for instantiating
>> Sequential (or Direct) IO with an unconstrained type? they both have
>> only procedural forms for Read, so how could you ever retrieve a value?
>
> No problem for a type like this (without the defaulted discriminant, you'll have indeed a problem, as for strings):
>
>   type Disc is (A, B, C, D);
>   type Rec (X: Disc := A) is record
>     case X is
>       when A => I: Integer;
>       when B => F: Float;
>       when C => B: Boolean;
>       when D => null;
>     end case;
>   end record;

OK, got it.