From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: 'raise' in aspects?
Date: Sun, 26 Oct 2014 00:16:43 -0500
Date: 2014-10-26T00:16:43-05:00 [thread overview]
Message-ID: <m2i03s$l1e$1@loke.gir.dk> (raw)
In-Reply-To: lyy4s67x3m.fsf@pushface.org
"Simon Wright" <simon@pushface.org> wrote in message
news:lyy4s67x3m.fsf@pushface.org...
> "Randy Brukardt" <randy@rrsoftware.com> writes:
>
>> You can write
>> raise Program_Error with "Not yet implemented";
>> in any function (since a raise expression matches any type), and you
>> don't
>> have to dream up a useless dummy return value to do so.
>
> actually
>
> return raise Program_Error with "Not yet implemented";
>
> of course.
Right.
> I liked (but haven't had reason to try; I had already spent far too long
> generating "useless dummy return values") Bob Duff's recursive solution:
>
> function F return Boolean is
> begin
> raise Program_Error with "Not yet implemented";
> return F;
> end F;
I think that one is a compiler-fall-over test, at least if the return type
is a limited and required build-in-place. :-) Not so much for Boolean (but
of course "return False" works fine there).
Randy.
prev parent reply other threads:[~2014-10-26 5:16 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-18 22:40 'raise' in aspects? Stephen Leake
2014-10-22 5:42 ` Simon Wright
2014-10-22 5:45 ` Simon Wright
2014-10-22 18:08 ` Stephen Leake
2014-10-23 22:42 ` Randy Brukardt
2014-10-24 3:22 ` Shark8
2014-10-24 7:20 ` Simon Wright
2014-10-26 5:16 ` Randy Brukardt [this message]
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