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From: "Nasser M. Abbasi" <nma@12000.org>
Newsgroups: comp.lang.ada
Subject: Re: How to initialize a matrix of one column only?
Date: Sat, 07 Jul 2012 21:09:56 -0500
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Date: 2012-07-07T21:09:56-05:00
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On 7/7/2012 8:47 PM, John B. Matthews wrote:
....
>> I tried B:=(1=>9.0,2=>2.03=>-2.0);
...
>>
>> What is the correct syntax to use?
>
> According to 4.3.3 Array Aggregates, you need to use named notation for
> a single component, otherwise "a single expression in parentheses is
> interpreted as a parenthesized expression."
>
>     B := ((1 =>  9.0),
>           (1 =>  2.0),
>           (1 => -2.0));
>
> <http://www.ada-auth.org/standards/12rm/html/RM-4-3-3.html>
>

Thanks John. I think I did browse some of these RM notes, but
I either missed it or did not understand it (sometimes
the RM writing is hard to understand for me).

But the above is a good example of why Ada has the
reputation of being too verbose.

Compare the above to Matlab for example to make
a matrix of one column

       B=[9 2 -2]'

or Mathematica

       B={{9},{2},{-2}}

But I guess on the other hand, one gets the strong typing
as a payback for all this extra typing. So may be one can't
complain too much.

regards,
--Nasser