Re: Question about base types

[dewar@merv.cs.nyu.edu (Robert Dewar)]

Robert said

   <<type Real is digits 7 range 0.0 .. 1.0;

   as in the original result, you will still get an unconstrained 7 digit
   base type.>>

Mats said

<<Now I know that this is not true for any reasonable implementation
  because floating point base types are always created from a finite set
  of representations available on the machine, but according to the RM
  there could exist a legal implementation of Ada 95 for which 100.0 is a
  possible value of Real'Base in variant (2) but not in variant (1). Or am
  I missing soemthing ? (If I am, then the RM is confusing).>>

Robert says

I was definitely only talking about imaginable implementations. You cannot
imagine an implementation that has a 7 digit floating machine type which
excludes the value 100.0.

That's in the same realm as noting that the above declaration may raise
Storage_Error!

And I see nothing in the RM that would stop you choosing this base type
in both cases if your machine actually had it!