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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Press Release - Ada 2012 Language Standard Approved by ISO
Date: Tue, 18 Dec 2012 17:24:09 -0600
Organization: Jacob Sparre Andersen Research & Innovation
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Date: 2012-12-18T17:24:09-06:00
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"Robert A Duff" <bobduff@shell01.TheWorld.com> wrote in message
news:wcc8v8vti17.fsf@shell01.TheWorld.com...
> 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?

No idea. Perhaps it is because only "old Ada hands" really grok the idea of
a constrained subtype, and a predicate is just a constraint on steroids
(well, a more general constraint). For people that don't understand the
power of constraints, extending them seems pointless. (Or maybe its just an
oversight by the people who wrote that press release - I didn't notice the
fact it was missing when I skimmed a draft last week.)

                                                         Randy.