Re: [sv-ec] 7.7 Constructors - restriction on constructor calls

Daniel,

In SV, class "allocation" and "construction" are linked via
the "new" call.  That is by intent.  In some other languages
one can decouple allocation and construction and in such
cases it might make more sense to do what you are suggesting,
but SV does not currently allow such decoupling.  The requirement
to use "super.new" rather than "<class_type>::new" is to
enforce a strict chaining sequence.  SV could have allowed
B::new for the chain call but then would need to explicitly
require that only the immediate super class method be called.
Requiring use of super.new is much simpler and doesn't impose
any real burden or additional restriction.

Gord.

danielm wrote:
> IMHO there is lack of restriction on that constructor cannot be 
> explicitly called :
> 
> - in class method,
> 
> - via scope operator <BASE_CLASS>::new, 
> 
> - throught class handle C c; initial c.new;
> 
> The only possibility is to call it via super.new (with all restriction 
> described in chining constructor chapter). Or in class handle 
> initialization, assignment.
> 
>  
> 
> Current text is not so clear so smdb may try:
> 
> class C extends B;
>     function new();
>         B::new;
>         B::new;
>     endfunction
> endclass
> 
>  
> 
> DANiel
> 
> 
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Gordon Vreugdenhil                                503-685-0808
Model Technology (Mentor Graphics)                gordonv@model.com


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