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From: G. B. <nonlegitur@nmhp.invalid>
Newsgroups: comp.lang.ada
Subject: Re: Exception_Occurence and language designers
Date: Mon, 4 Dec 2017 20:27:57 -0000 (UTC)
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Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:

> In Ada 83 exception was not a first-class type. 

Still isn’t.

> In terms of tagged types it is like this:
 
Exceptions may be understood to be part
of control structure. Doing so lets you see
them as neither objects nor subprograms.
So, in exceptional situations, the program
isn’t moving along *if*s and *loop*s and calls;
rather, a different mechanism of jumping is
triggered. You can handle the situation by
referring to its name, the exception’s, 
in a handler.

Other answers explain what to do if the
name is not in scope and how to print 
interesting information about what named
exception has caused the situation.