Re: From extended Pascals to Ada 95 guide

[Gautier <gautier.demontmollin@maths.unine.ch>]

Marco:

> Pretty much yes. But because the size of "matrix" is fixed, and not
> dynamical, it is too limited IMHO.

No no... size of "matrix" is NOT fixed; only subtypes of it or objects of this
type are - that's the whole difference :-) ! If you want resizable things, it
is also doable in Ada. E.g.

 type matrix( max_m,max_n: positive ) is record
   a: array( 1..max_m, 1..max_n ) of my_float;
   m: positive:= max_m;
   n: positive:= max_n;
 end record;

Or without maximum size, you could use OO techniques with controlled types, maybe -
but a bit expensive for efficient matrix calculations...

> When I had to design a new language, I would add it I think, because it
> seems nice. But to change to another language (... ADA..) for it?

Just for it ? It depends - on needs and personal tastes...
My opinion is that the global advantage of the change
is worth. Also for most details - e.g. for this matrix affair:
in "classic" Pascal there is no solution! Anyway the jump to
Ada is not a frightening change - rather an upgrade...

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Gautier  --  http://members.xoom.com/gdemont/gsoft.htm