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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Community Input for the Maintenance and Revision of the Ada
 Programming Language
Date: Fri, 11 Aug 2017 11:12:57 +0200
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Xref: news.eternal-september.org comp.lang.ada:47704
Date: 2017-08-11T11:12:57+02:00
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On 2017-08-11 10:53, Stefan.Lucks@uni-weimar.de wrote:
> On Fri, 11 Aug 2017, Dmitry A. Kazakov wrote:
> 
>>>    function Calculate(A, B, C: Integer; D, E, F: Float) return Numeric;
>>>    -- returns either Integer or Float
>> [...]
>>
>> This looks awful to me.
> 
> Well, I didn't say I would like that. But the OP asked for the ad-hoc
> creation of anonymous tuples, as in
> 
>    function Calculate(A, B, C: Integer; D, E, F: Float)
>      return (Integer or Float);
> 
> (without actually suggesting a specific syntax; the syntax is mine), and 
> my point was, that if you want tuples for Ada, you should ask to define 
> them as proper types, rather than as ad-hoc anonymous types.

I don't disagree but types must have meaning. In some cases they don't. 
And why the tuple used in arguments:

    A, B, C: Integer; D, E, F: Float

does not need to have a type? To me tuples are more about handling 
assorted lists like arguments are results.

Also there are many co-types which need not to be named. To name few

    T'Base
    T'Class
    T'Access
    T'Interface
    T'Public_Parent (N)
    T'Array_Element
    T'Array_Index (D)
    T'Array_Range (D)
    T'Record_Member (N)
    T'Discriminants_List
    T'Access_Target_Type
    T'Access_Pool_Type
    T'Arguments_List
    T'Result_Type

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de