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From: don_harrison@my-deja.com
Subject: Re: access-to-constant dispatching params
Date: 2000/05/09
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Date: 2000-05-09T00:00:00+00:00
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  andt@nospam.tj wrote:
> m_cubed@my-deja.com wrote:
> >
> > Ada provides access-to-variable dispatching
> > parameters.

[..]

> > What it doesn't seem to provide is
> > access-to-constant dispatching parameters.

[..]

> How about using an  in  parameter?
>
>   function Exercise_Mode (
>       State : in State_Type)
>       return Exercise_Mode_Type;
>
> If the code that uses this type are maintaining some sort of
structure,
> list or array of State_Type pointers, one can always dereference:
>
>    Mode := Exercide_Mode (State =>  State_Ptr.all);

Thanks. That almost gives me what I'm after. (I'll have to wait for
Ada 0X to provide access-to-constant dispatching parameters before I
can acheive consistent signatures using access types).


Don Harrison.


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