From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00
	autolearn=unavailable autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!news.unit0.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: Niklas Holsti <niklas.holsti@tidorum.invalid>
Newsgroups: comp.lang.ada
Subject: Re: syntaxic exploration
Date: Fri, 22 Dec 2017 20:27:02 +0200
Organization: Tidorum Ltd
Message-ID: <fa513mFo38lU1@mid.individual.net>
References: <0d33e631-e63d-4346-ac95-5eec72127f4f@googlegroups.com>
 <b788b6d0-641a-4095-ab39-981645ea32a1@googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: individual.net X56tMh8e8W/PAo86VrBDaAg7d9kf7JRH2f2I7yBf0WLQEYxRj4
Cancel-Lock: sha1:3fAzB/l/yU8RDwHet3Tn/lUq9hw=
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:45.0)
 Gecko/20100101 Thunderbird/45.8.0
In-Reply-To: <b788b6d0-641a-4095-ab39-981645ea32a1@googlegroups.com>
Xref: reader02.eternal-september.org comp.lang.ada:49591
Date: 2017-12-22T20:27:02+02:00
List-Id: <comp.lang.ada>

On 17-12-22 15:31 , Mehdi Saada wrote:
> It compiled, but I entered the agonizing world of debugging run time erros...
> What in that:
> return RES: T_POLYNOME :=
> (T_DEGRE'MAX(POLY_A.DEGRE,POLY_B.DEGRE),POLY_A.COEF) do
> 	for I in POLY_B.COEF'Range loop
> 		RES.COEF(I) := RES.COEF(I) + POLY_B.COEF(I);
> 	end loop;
> 	RES := POLY_REDUIT(RES);
> end return;
>
> is wrong ? Because the result is.
> P1: 1 -2X
> P2: -1
> POLY1 + (POLY1 * POLY2) = 9 -15X +2X** 2  -- wrong.

I can't help with that, because you do not show the input values, nor 
the output procedures.

> It ends with raised CONSTRAINT_ERROR : p_poly_v1_g.adb:63 length check failed
>  59 function "+" (POLY_A, POLY_B: T_POLYNOME) return T_POLYNOME is
>  60 begin
>  61     return RES: T_POLYNOME :=
>  62     (T_DEGRE'MAX(POLY_A.DEGRE,POLY_B.DEGRE),POLY_A.COEF) do

RES.COEF should have a length of RES.DEGRE, but the aggregate above 
supplies an array (POLY_A.COEF) with a length of POLY_A.DEGRE. If 
POLY_B.DEGRE is larger than POLY_A.DEGRE, these lengths are different.

-- 
Niklas Holsti
Tidorum Ltd
niklas holsti tidorum fi
       .      @       .