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From: Niklas Holsti <niklas.holsti@tidorum.invalid>
Newsgroups: comp.lang.ada
Subject: Re: "too few element" in an unconstrained array, given as litteral ?
Date: Sat, 20 Jan 2018 23:27:21 +0200
Organization: Tidorum Ltd
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Xref: reader02.eternal-september.org comp.lang.ada:50031
Date: 2018-01-20T23:27:21+02:00
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On 18-01-20 18:52 , Mehdi Saada wrote:
> We discussed it some weeks ago,
> but how do I write:
> Temp := (Poly_B.Degre + Ind - 1, (Poly_B.Degre + Ind - 1 => (1/1)), others => <>);

(There seems to be a typo in the above: the second ')' should be at the 
end.)

> Ind is the index of a for loop, hence there's a dynamic choice, hence ...
> No other choices possible. So the above is illegal.

Yes.

> I want the nicest expression, because the algo part was already hard

Assuming that Poly_B.Degre + Ind - 1 is the highest index ('Last) in the 
aggregate, you could concatenate two aggregates (the index used in the 
second, one-element concatenand is irrelevant, I chose 1 for brevity, 
see RM 4.5.3):

Temp := (
    Poly_B.Degre + Ind - 1,
    (0 .. Poly_B.Degre + Ind - 2 => <>) & (1 => (1/1)));

That assumes also that the first index is zero.

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