From: Niklas Holsti <niklas.holsti@tidorum.invalid>
Subject: Re: syntaxic exploration
Date: Sat, 23 Dec 2017 15:04:55 +0200
Date: 2017-12-23T15:04:55+02:00 [thread overview]
Message-ID: <fa72joF7i7vU1@mid.individual.net> (raw)
In-Reply-To: <db04d2e2-3b96-47b5-a607-f9cd9689c257@googlegroups.com>
On 17-12-23 14:16 , Mehdi Saada wrote:
> As I see it, but I don't know the intricated rules of
> extended return statements, RES seems to be initialized as
> a constrained record object.
I believe it is. Does the DEGRE discriminant have a default value? If
not, all T_POLYNOME objects are constrained.
> Does "return RES: T_POLYNOME (T_DEGRE'MAX(POLY_A.DEGRE,POLY_B.DEGRE)) do"
> constrains its discrimant ?
Yes, just as a declaration X : String(1..4) constrains the index bounds
of X.
> It would explain that RES := POLY_REDUIT(RES) three lines below
> causes "raised CONSTRAINT_ERROR : p_poly_v1_g.adb:67 discriminant check failed"
Certainly, if POLY_REDUIT returns a value with a different value of the
DEGRE discriminant. I guess POLY_REDUIT drops any zero-valued high-order
coefficients, so it can return a poly with a smaller DEGRE than its input.
I would make RES into a local variable (not an extended return object),
declare and assign it as now, and then just
return POLY_REDUIT (RES);
at the end.
--
Niklas Holsti
Tidorum Ltd
niklas holsti tidorum fi
. @ .
next prev parent reply other threads:[~2017-12-23 13:04 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-20 17:28 syntaxic exploration Mehdi Saada
2017-12-20 17:32 ` Mehdi Saada
2017-12-20 20:08 ` Niklas Holsti
2017-12-20 22:18 ` Mehdi Saada
2017-12-20 22:45 ` Mehdi Saada
2017-12-21 7:24 ` Randy Brukardt
2017-12-21 7:44 ` Niklas Holsti
2017-12-21 7:21 ` Randy Brukardt
2017-12-21 16:24 ` Jeffrey R. Carter
2017-12-22 5:01 ` Robert Eachus
2017-12-22 21:15 ` Simon Clubley
2017-12-22 22:11 ` Niklas Holsti
2017-12-22 22:51 ` Dmitry A. Kazakov
2017-12-23 7:15 ` Niklas Holsti
2017-12-23 16:23 ` Jeffrey R. Carter
2017-12-24 3:37 ` Robert Eachus
2017-12-24 13:39 ` Niklas Holsti
2017-12-24 13:32 ` Niklas Holsti
2017-12-25 13:40 ` Jeffrey R. Carter
2017-12-25 14:42 ` Mehdi Saada
2017-12-25 17:03 ` Dmitry A. Kazakov
2017-12-25 18:27 ` Niklas Holsti
2017-12-25 20:12 ` Jacob Sparre Andersen
2017-12-20 20:05 ` Niklas Holsti
2017-12-20 22:48 ` Mehdi Saada
2017-12-20 23:39 ` Mehdi Saada
2017-12-21 0:35 ` Mehdi Saada
2017-12-21 7:18 ` Randy Brukardt
2017-12-21 19:23 ` G. B.
2017-12-21 23:46 ` bj.mooremr
2017-12-22 23:45 ` Randy Brukardt
2017-12-22 13:31 ` Mehdi Saada
2017-12-22 18:00 ` Mehdi Saada
2017-12-22 18:27 ` Niklas Holsti
2017-12-22 20:25 ` Mehdi Saada
2017-12-22 22:33 ` Niklas Holsti
2017-12-23 1:47 ` Mehdi Saada
2017-12-23 7:17 ` Niklas Holsti
2017-12-23 11:23 ` Mehdi Saada
2017-12-23 11:39 ` Mehdi Saada
2017-12-23 12:09 ` Niklas Holsti
2017-12-23 12:12 ` Mehdi Saada
2017-12-23 12:16 ` Mehdi Saada
2017-12-23 13:04 ` Niklas Holsti [this message]
2017-12-23 14:02 ` Mehdi Saada
2017-12-23 14:46 ` Mehdi Saada
2017-12-23 15:03 ` Mehdi Saada
2017-12-23 22:11 ` Niklas Holsti
2017-12-24 0:55 ` Mehdi Saada
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox