Re: generic package dilemma

["Matthew Heaney" <matthew_heaney@acm.org>]

In article <383510EA.9DFEE8B6@mail.com> , Mats Weber <matsw@mail.com>  
wrote:

> No. I totally agree with Robert Dewar here: never use Elaborate, use
> Elaborate_All instead.

OK, I'm convinced.  Never use pragma Elaborate; always use pragma
Elaborate_All.  Either Norm's book is wrong, or I misinterpreted what he
said (probably the latter).


> Your approach of using Elaborate at each level, besides being hard to
> enforce on a large project, puts unnecessary constraints on the
> elaboration order: in our example, where P2I instantiates P2
> instantiates P1, valid elaboration orders are: P1, P2, P2I and P2, P1,
> P2I. You are unnecessarily enforcing the first one with your approach.

I just assumed that whenever you instantiate a package (inside another
package), that you have to pragma Elaborate_All the generic unit.

But you seem to advocate only a conditional application of this
guideline.  When specifically do you recommend using Elaborate_All,
versus not needing to bother?


--
It is impossible to feel great confidence in a negative theory which has
always rested its main support on the weak points of its opponent.

Joseph Needham, "A Mechanistic Criticism of Vitalism"