Re: Class object initialization....

Re: Class object initialization....

[Jon S Anthony]

In article <343BEFFE.200574F6@linkabit.titan.com> Marc Bejerano <t_mjb@linkabit.titan.com> writes:

> type foo is tagged record
>   a: integer := -1234;
> end record;
> 
> type bar is new foo with record
>   b: natural := 1234;
> end record;
> 
> How would I "initialize" data member 'a' inside of bar? In C++ I would
> do this in the constructor. How would I do this in Ada95? (Can I do this
> in Ada95?)

What do you mean by "inside of bar"??  Wherever the structures are
visible an aggregate takes the place of a C++ constructor:

    X : Bar := (A => 13, B => 31);

or simply

    X : Bar := (13, 31);

or, in a derived case such as this

    X : Bar := (foo with B => 77);

If the structures are not visible, you could use controlled types,
which have user definable initialization procedures per type.  You
might also try discriminants.

/Jon

-- 
Jon Anthony
STL, Belmont, MA 02178, 617.484.3383 
"Nightmares - Ha!  The way my life's been going lately,
 Who'd notice?"  -- Londo Mollari