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From: Colin Paul Gloster <Colin_Paul_Gloster@ACM.org>
Newsgroups: comp.lang.eiffel,comp.lang.ada,comp.lang.modula3,comp.programming
Subject: Re: Alternatives to C: ObjectPascal, Eiffel, Ada or Modula-3?
Date: Thu, 23 Jul 2009 12:01:53 +0000
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Date: 2009-07-23T12:01:53+00:00
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On Wed, 22 Jul 2009, Simon J. Wright wrote:

|--------------------------------------------------------------------|
|"[..]                                                               |
|                                                                    |
|And what will happen to this distinction with Point (2.0, 2.0);?    |
|                                                                    |
|You could use named parameter association, but *much* better to use |
|proper types --                                                     |
|                                                                    |
|type Cartesian_Coordinate is record                                 |
|   X : Metres;                                                      |
|   Y : Metres;                                                      |
|end record;                                                         |
|                                                                    |
|which makes it easy to (for instance) create appropriate functions  |
|"+", "-", "*", "/"."                                                |
|--------------------------------------------------------------------|

Oh dear, Mr. Wright is nearly as bad as Mr. Rabak. Dr. Meyer gave an
example of overloading which Eiffel can perform which he claimed that
Ada can not manage. The pseudo-Ada example by Dr. Meyer did not have a
record, and a less minor upgrade than adding a record was sufficient
to show that Dr. Meyer did not know what he was writing about.

|--------------------------------------------------------------------|
|"I don't think I'd ever, even in an example, write 3.14 for         |
|Ada.Numerics.Pi. We have a partner company who redefined pi to be   |
|3.14159, causing a lot of expense to both sides when we sent a value|
|greater than this (but less than Ada.Numerics.Pi) and they rejected |
|it .."                                                              |
|--------------------------------------------------------------------|

Ah well.