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From: WishList@2600.com (Technobabble)
Subject: Re: unconstrained array clarification
Date: 1998/09/19
Message-ID: <WishList-1909981042300001@a1.phoenix-7.goodnet.com>#1/1
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References: <WishList-1809982255060001@a17.phoenix-14.goodnet.com>
 <EzJ5up.JLu.0.-s@inmet.camb.inmet.com>
Organization: WannaBeACracker
NNTP-Posting-Date: Sat, 19 Sep 1998 10:47:23 MDT
Newsgroups: comp.lang.ada
Date: 1998-09-19T00:00:00+00:00
List-Id: <comp.lang.ada>

Greetings Tucker,

Thanks for the excellent response to my problem.  Thanks also for being
kind enough to see through my novice attempts at syntax and patient enough
to really understand and attack this problem. I'm sorry for the late night
off the cuff coding examples that introduced misleading errors and
produced a frustrated audience, it's all my fault, sorry. Thanks for
seeing through all of that !!!


recall:

>    xyz5_array : aliased xyz_array := (1..5 => 0);
> 
> This requirement for subtype matching is a bit of a pain, but using 'Access
> imposes some stringent requirements on matching of representation, and
> for pointers to arrays, it can matter greatly whether the nominal
> subtype is constrained or unconstrained (you'll have to trust me on
> this one).
> 
> : now I want to loop:
> 
> : for I in This.XYZ(1)'RANGE
> :      loop 
> :       ..........
> 
> 
> : ???? Will this work ???  Is the syntax totally incorrect ???
> 
> This can be made to work, with the above changes.
> 
> It might be interesting to have some idea where you are headed
> with all of this.  There might be a simpler overall solution.
> 

What I want to do is to keep the addresses for several arrays of records
of different lengths in an array of pointers. Then write the contents of
each record to I/O.  The problem is to do this with only the array of
pointers, if I don't want to keep track of the size of each array (number
of records), and I want to use the RANGE attribute to determine the size. 
But the only way I have of getting to the array of records is via the
pointer.  I didn't design this stuff either, it's adopted from legacy
code. I'll re-code the stuff in GNAT with the changes you've supplied and
see if I can get a good compile.

Thanks,
Richmond