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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Exceptions
Newsgroups: comp.lang.ada
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Date: Wed, 12 Dec 2007 14:14:07 +0100
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Date: 2007-12-12T14:06:22+01:00
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On Wed, 12 Dec 2007 13:37:09 +0200, Niklas Holsti wrote:

> If the implementation with Exception_Id is so easy, I wonder that 
> the syntax with "exception" as formal parameter is not included in 
> the language. But I know that language extensions are prioritized, 
> and in fact I have never needed a formal exception parameter, 
> although I have sometimes written wrappers for instances of 
> generics just to translate an exception defined and raised by the 
> generic into some other exception for the user of the generic.
> 
> In any plan to extend Ada with exception contracts, I think that 
> formal exception parameters should be included, or else the 
> contract should allow exceptions to be named by Exception_Id as 
> well as by the lexical identifier.

The reverse, the keyword "exception" should be dropped and replaced by a
plain type name Standard.Exception. Then we would be able to pass an
exception (or an array of) wherever we wished to. (Exception_Id is IMO a
hack)

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