From: ncohen@watson.ibm.com (Norman H. Cohen)
Subject: Re: Implementing pointers to pointers in Ada
Date: 1996/09/09
Date: 1996-09-09T00:00:00+00:00 [thread overview]
Message-ID: <511ngk$g6n@watnews1.watson.ibm.com> (raw)
In-Reply-To: Pine.GSO.3.93.960909230243.7142A-100000@firefly.sd.monash.edu.au
In article <Pine.GSO.3.93.960909230243.7142A-100000@firefly.sd.monash.edu.au>,
Vasilios Tourloupis <vasilios@insect.sd.monash.edu.au> writes:
|> For example, I have declared the following variable in C:
|>
|> unsigned **a;
|>
|> How would this be expressed in Ada terms?
type Unsigned is mod 2**Integer'Size; -- or whatever you choose
type Pointer_To_Unsigned is access all Unsigned;
type Pointer_to_Pointer_To_Unsigned is access all Pointer_To_Unsigned;
A: Pointer_To_Pointer_To_Unsigned;
Are you sure you need pointer-to-pointer-to unsigned? In particular, if
you are writing a procedure intended to set a Pointer_To_Unsigned
variable, you can pass that variable itself as a Pointer_To_Unsigned
parameter of mode out or in out, rather than passing a pointer to that
variable as a Pointer_To_Pointer_To_Unsigned parameter.
--
Norman H. Cohen ncohen@watson.ibm.com
next prev parent reply other threads:[~1996-09-09 0:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-09-09 0:00 Implementing pointers to pointers in Ada Vasilios Tourloupis
1996-09-09 0:00 ` Jonas Nygren
1996-09-09 0:00 ` John Herro
1996-09-10 0:00 ` David Shochat
1996-09-11 0:00 ` Larry Kilgallen
1996-09-12 0:00 ` Dr. John B. Matthews
1996-09-13 0:00 ` Better MacOS Handles through Ada (was: Implementing Pointers to Pointe Larry Kilgallen
1996-09-14 0:00 ` Dr. John B. Matthews
1996-09-15 0:00 ` GUI Generators and Class Libraries (was: Better MacOS Handles Larry Kilgallen
1996-09-15 0:00 ` jim hopper
1996-09-16 0:00 ` Larry Kilgallen
1996-09-17 0:00 ` GUI Generators and Class Libraries Dr. John B. Matthews
1996-09-17 0:00 ` GUI Generators and Class Libraries (wa David Kristola
1996-09-09 0:00 ` Implementing pointers to pointers in Ada Mark A Biggar
1996-09-09 0:00 ` Samuel Tardieu
1996-09-09 0:00 ` Norman H. Cohen [this message]
1996-09-10 0:00 ` John Demby
1996-09-10 0:00 ` Robert A Duff
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