From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,ee2e271b166c2587
X-Google-Attributes: gid103376,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!news2.google.com!postnews.google.com!p25g2000hsf.googlegroups.com!not-for-mail
From: gpriv@axonx.com
Newsgroups: comp.lang.ada
Subject: Re: Files and controlled types
Date: Sat, 8 Mar 2008 13:56:48 -0800 (PST)
Organization: http://groups.google.com
Message-ID: 
 <0658b07c-2fbf-4b0a-a06d-8e6aa753d5bf@p25g2000hsf.googlegroups.com>
References: 
 <3bd96475-530b-46a7-9b07-11ea49105b2c@e31g2000hse.googlegroups.com>
NNTP-Posting-Host: 69.250.188.114
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-Trace: posting.google.com 1205013408 15945 127.0.0.1 (8 Mar 2008 21:56:48
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Sat, 8 Mar 2008 21:56:48 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: p25g2000hsf.googlegroups.com; posting-host=69.250.188.114;
	posting-account=YaY8rAoAAAAAnFXOECY3BGVJsrvFJCgy
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US;
 rv:1.8.1.12)
	Gecko/20080201 Firefox/2.0.0.12,gzip(gfe),gzip(gfe)
Xref: g2news1.google.com comp.lang.ada:20240
Date: 2008-03-08T13:56:48-08:00
List-Id: <comp.lang.ada>

On Mar 8, 4:22 pm, Maciej Sobczak <see.my.homep...@gmail.com> wrote:
> Hi,
>
> File types are not Controlled.
> What is the rationale for this?
>
> I would think that types associated with external resources should be
> Controlled to facilitate resource management in the presence of
> exceptions - in this context the file types in the Ada standard
> library seem to be designed against this common policy.
>
> --
> Maciej Sobczak *www.msobczak.com*www.inspirel.com

Don't know about rationale (might be compatibility issue with Ada 83).
I use files mostly directly or as instantiated generics encapsulated
inside other classes (which may be derived from limited controlled) to
do automatic cleanup when needed.  Those are pretty much like C
FILEs.  I have issues with Root_Stream_Type being not controlled
type.  That seems to be bigger drawback.

Regards,

George Privalov