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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: type conversion
Date: Mon, 13 Oct 2014 17:36:35 -0500
Organization: Jacob Sparre Andersen Research & Innovation
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Date: 2014-10-13T17:36:35-05:00
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"Georg Bauhaus" <bauhaus@futureapps.invalid> wrote in message 
news:m1f1gi$ooh$1@dont-email.me...
> On 12.10.14 11:37, Pascal Obry wrote:
>> To control the message or the exception to be raised one can use the
>> Predicate_Failure aspect:
>>
>> subtype Integer_String is new String
>>     with Dynamic_Predicate => Integer'Value (Integer_String) in Integer,
>>          Predicate_Failure => "not an integer string";
>
> Is Predicate_Failure a new aspect in GNAT? My RM does not list it,
> and GNAT GPL 2014 rejects it.

It'll be in Corrigendum 2015 (the next set of bug fixes for Ada). Before 
that comes out, I wouldn't depend on it (one expects it to take a while 
before compilers catch up to the Corrigendum).

                                        Randy.