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From: Bill Findlay <yaldnif.w@blueyonder.co.uk>
Newsgroups: comp.lang.ada,fr.comp.lang.ada
Subject: Re: Press Release - Ada 2012 Language Standard Approved by ISO
Date: Wed, 19 Dec 2012 14:34:15 +0000
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On 19/12/2012 08:33, in article 7wrdmbre6jw9.qww9l0uzj6mg.dlg@40tude.net,
"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote:

> On Tue, 18 Dec 2012 21:12:25 +0000, Bill Findlay wrote:
> 
>> On 18/12/2012 16:57, in article wcc8v8vti17.fsf@shell01.TheWorld.com,
>> "Robert A Duff" <bobduff@shell01.TheWorld.com> wrote:
>> 
>>> dirk@vana.cs.kuleuven.be. (Dirk Craeynest) writes:
>>> 
>>>> Ada 2012 brings significant enhancements to Ada, most notably in the
>>>> area of "contract-based programming."  New features here include the
>>>> ability to specify preconditions and postconditions for subprograms,
>>>> and invariants for private (encapsulated) types.
>>> 
>>> Why does everybody neglect predicates, which are more important
>>> than pre/post/invariant?
>> 
>> A bit of fun with a predicate:
> [...]
> 
> Take an instance of Ada.Numerics.Discrete_Random and do:
> 
>    subtype More_Fun_Number is Integer with
>       Dynamic_Predicate => Random = More_Fun_Number;

Now that IS funnny!

-- 
Bill Findlay
with blueyonder.co.uk;
use  surname & forename;