Constant Record

Constant Record

[ldries46]

I have  simple record for instance

Type alpha is record
    element1 : integer;
    element2 : double_float;
end record;

apart from calculating thins with the record I do neen som constants of the 
record
  that could be:
   element1 must be 5
   element 2 must de 107.546

and another
element1 must be -2 and the other 547.24

Is it possible to make a constant by
declaring something like
   rt : constant alpha :=(5, 107.547)   and
   xt : constant apha :=( -2, 547.547)

This would be nice 

Re: Constant Record

[J-P. Rosen]

Le 08/12/2018 à 16:58, ldries46 a écrit :
> Is it possible to make a constant by
> declaring something like
>   rt : constant alpha :=(5, 107.547)   and
>   xt : constant apha :=( -2, 547.547)
Why don't you simply try it? Ada people trust their compiler...

Except for
1) double_float should be long_float
2) apha should be alpha
3) missing semicolons

it works!

-- 
J-P. Rosen
Adalog
2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX
Tel: +33 1 45 29 21 52, Fax: +33 1 45 29 25 00
http://www.adalog.fr

Re: Constant Record

[ldries46]

Thanks,

Couldn't find it in Booch. It works.
Concerning the other problems you mentioned. I just made an example 
disregarding any syntax errors and not created types

L. Dries

"J-P. Rosen"  schreef in bericht news:pugql5$1g7c$1@gioia.aioe.org...

Le 08/12/2018 à 16:58, ldries46 a écrit :
> Is it possible to make a constant by
> declaring something like
>   rt : constant alpha :=(5, 107.547)   and
>   xt : constant apha :=( -2, 547.547)
Why don't you simply try it? Ada people trust their compiler...

Except for
1) double_float should be long_float
2) apha should be alpha
3) missing semicolons

it works!

-- 
J-P. Rosen
Adalog
2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX
Tel: +33 1 45 29 21 52, Fax: +33 1 45 29 25 00
http://www.adalog.fr 

Re: Constant Record

[Simon Wright]

"ldries46" <bertus.dries@planet.nl> writes:

> Couldn't find it in Booch. It works.

Booch?

Re: Constant Record

[julian.fondren]

On Sunday, December 9, 2018 at 2:34:41 AM UTC-6, Simon Wright wrote:
> "ldries46" <bertus.dries@planet.nl> writes:
> 
> > Couldn't find it in Booch. It works.
> 
> Booch?

Some books from the late 80s I'd guess:

Software Engineering With Ada by GRADY BOOCH (1987-05-03)

Object oriented design with applications (Benjamin/Cummings series in Ada and software engineering)

Software Components With Ada: Structures, Tools, and Subsystems (The Benjamin/Cummings Series in Ada and Software Engineering)

Re: Constant Record

[Simon Wright]

"ldries46" <bertus.dries@planet.nl> writes:

> Couldn't find it in Booch. It works.

Well, the Ada 83 Rationale discusses aggregates ..
http://archive.adaic.com/standards/83rat/html/ratl-03-05.html#3.5

(the current RM is rather opaque on this! but that's why there's a
Rationale. And, new Rationales tend to describe new features of the
corresponding RM release)

Re: Constant Record

[Dennis Lee Bieber]

On Sun, 09 Dec 2018 21:21:02 +0000, Simon Wright <simon@pushface.org>
declaimed the following:


>(the current RM is rather opaque on this! but that's why there's a
>Rationale. And, new Rationales tend to describe new features of the
>corresponding RM release)

	Which "feature" I discovered after having disposed of older
Rationales...


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