Re: Constructors/Destructors in Ada95

[Francois Godme <fgodme@bigfoot.com>]

Ray Blaak a �crit :

> Francois Godme <fgodme@bigfoot.com> writes:
>
> > I. Non-primitive procedures used as constructors of limited instances: As
> > limited instances can't be initialized with record aggregates, it is possible
> > to write code which forgets to initialize all record fields.
>
> Forgetting to initialize a field is equivalent to using a default constructor,
> no? In that case the Initialize routine can cover it.
>

Recall that the context was that defaulted record fields and the Initialize
routine were said inadequate to initialize all instances.

Take for example, the class Person. There are no such things as a default birth
date, a default sex or a default eyes color for instances of the class Person. To
provide methods to later fix the birth date, the sex and the eyes color to
appropriate values opens up instances to mistakes. These three instance attributes
should be constant and hence initialized by the constructor.