Re: Generic child units with Gnat

[sean@graph.es.hac.com (Sean McNeil)]

In article <3le685$l9h@Starbase.NeoSoft.COM> dweller@Starbase.NeoSoft.COM (David Weller) writes:

>   --File: complexnumbers-polar.ads
>   generic
>   package ComplexNumbers.Polar is
>      procedure bar( Dummy : in FloatType);
>   end ComplexNumbers.Polar;
>
> ...
>
>   --Filename foobar.adb
>   with ComplexNumbers.Polar; -- auto visibility to parent
>   procedure FooBar is
>      package RealComplexNumbers is new ComplexNumbers( Float);
>      package PolarRealComplexNumbers is new RealComplexNumbers.Polar;
>   begin -- FooBar
>     null;
>   end FooBar;
>
  Since it appears that ComplexNumbers.Polar is only dependant on FloatType
from the parent package, wouldn't the following be better?

   --File: complexnumbers-polar.ads
   package ComplexNumbers.Polar is
      procedure bar( Dummy : in FloatType);
   end ComplexNumbers.Polar;

   --Filename foobar.adb
   with ComplexNumbers.Polar; -- auto visibility to parent
   procedure FooBar is
      package RealComplexNumbers is new ComplexNumbers( Float);
      package PolarRealComplexNumbers renames RealComplexNumbers.Polar;
   begin -- FooBar
     null;
   end FooBar;

One less generic instantiation.

Sean McNeil
smcneil@netcom.com