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From: G. B. <nonlegitur@nmhp.invalid>
Newsgroups: comp.lang.ada
Subject: Re: Exception_Occurence and language designers
Date: Tue, 5 Dec 2017 00:16:49 -0000 (UTC)
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Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
> On 2017-12-04 21:27, G. B. wrote:
>> Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
>> 
>>> In Ada 83 exception was not a first-class type.
>> 
>> Still isn’t.
> 
> But its "class-wide" type Exception_Occurrence is.

Exception_Occurrence feels like an enumeration, 
to me at least, albeit of places in a program,
thus of a rather special set of “values”.


> Then it became clear that the exception should carry 
> user-defined and other information. 

User-defined  information being strings, and
other information being places to be embedded in
strings, plus names of exceptions.

How about this: the idea of creating normal, 
typed objects as payload of wild jumps in
abnormal (exceptional) situations is rather optimistic.