Qu: 3D unconstrained arrays

[randyb@ssd.fsi.com (Randy Binnie)]

Hi,  Assuming this news group allows non political postings, I have an
Ada implementation question???


How can one create a 3 dimensional unconstrained array  made up of a one
dimensional  unconstrained array  and a two dimensional unconstrained array.
Ideally I would like to do the following, but it is not allowed because the
type  ARRAY_2D_TYPE  is unconstrained.

  type ARRAY_2D_TYPE  is array ( range <>, range <>)  of DATA_TYPE;
  type ARRAY_3D_TYPE  is array ( range <>)  of  ARRAY_2D_TYPE;
  

I could do it by creating access pointers to the 2-D array type such as

  type ARRAY_2D_TYPE  is array ( range <>, range <>)  of DATA_TYPE;
  type ACCESS_2D_TYPE is access  ARRAY_2D_TYPE;
  type ARRAY_3D_TYPE  is array ( range <>)  of  ACCESS_2D_TYPE;


but I would prefer a cleaner solution using a single monolithic 3 dimensional 
data structure.  So my question is can it be done, if so a brief explaination 
would be appreciated.  This is for an Ada '83 compiler.


Thanks for any feedback you may have.


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Randy Binnie            FlightSafety International
                        Broken Arrow, Oklahoma 74012
randyb@ssd.fsi.com      918-251-0500 ext.  464
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