Re: Functions vs constants

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Fri, 25 Jul 2014 20:45:38 -0600, Shark8 wrote:

> On 25-Jul-14 14:02, Dmitry A. Kazakov wrote:
>> One thing missing in Ada is ad-hoc supertypes. That is when you could
>> create a common parent for existing types.
> 
> I can't see any way that ad-hoc supertypes won't create a huge mess.
> This is fundamentally different from creating an actual super-type and 
> restructuring to take advantage of it.

The mess is to think one could design types as hierarchies. That does not
work and is unmaintainable because changes at the roots of hierarchies have
huge impact, bigger when closer to the root. This basically is the main
reason why no design could really evolve. All of them break under changes
sooner rather than later. The idea is to add hierarchies at the client's
side without changing the core functionality of involved types and without
designing heaps of meaningless helper types and adapters.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de