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From: ytomino <aghia05@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Forcing Exception Handling
Date: Wed, 2 Mar 2011 05:39:07 -0800 (PST)
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Date: 2011-03-02T05:39:07-08:00
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On Mar 1, 2:27=A0am, iloAda <egzgh...@gmail.com> wrote:
> Hello everybody,
>
> I was wondering if there is a way in Ada to force exception handling.
> For instance, if there is a call to a function that may raise an
> exception, force the caller to handle that exception.
> I was wondering if there is a compile time pragma that will isntruct
> the compiler to force the handling of exceptions!!
>
> Thanks guys
>
> Elie

I'm thinking exception-pass-by-argument style (?)

procedure Callee (Storage_Error : Exception_Id) is
begin
   ...
exception
   when Standard.Storage_Error =3D> Raise_Exception (Storage_Error);
end Callee;

This function forces a caller to write the exception name explicitly.
A caller may become aware exception-handling,
and it able to classify same exception by local-exception, for
example:

Caller : declare
   Local1, Local2 : exception;
begin
   Callee (Local1'Identity); -- *1
   Callee (Local2'Identity); -- *2
exception
   when Local1 =3D> ...; -- from *1
   when Local2 =3D> ...; -- from *2
end Caller;