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From: jsa@alexandria (Jon S Anthony)
Subject: Re: Syntax for tagged record types (was Re: Not intended for use in
 medical,)
Date: 1997/05/23
Message-ID: <JSA.97May22203202@alexandria>#1/1
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Newsgroups: comp.lang.ada
Date: 1997-05-23T00:00:00+00:00
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In article <mheaney-ya023680002105972302430001@news.ni.net> mheaney@ni.net (Matthew Heaney) writes:

> In article <JSA.97May21160340@alexandria>, jsa@alexandria (Jon S Anthony) wrote:
> 
> 
> >That's more or less what Limited_Controlled gives you.  You can "pass
> >parameters" to Initialize via discriminants.  You can also play the
> >"rename the function result" game for limited types (which I think is
> >actually pretty nice) and that does what you want as well.
> 
> I think that using discriminants as "constructor arguments" is a real
> kludge, and obfuscates declarations.  Ada 95 doesn't have constructors, so
> let's not try to fight the language.

Who's fighting.  That's what this stuff is there for.  You can say it
isn't done too well, but that's different.

> Here is what I'd like to do:
> 
> declare
>    The_File : File_Type'Open (Name => "my_file.dat", Mode => In_Mode);
> begin
> 
> Renaming a function return as a constant object won't fly, because I have
> to modify the object.

Well then, it's not of a limited type, now is it? which is the context
that was being discussed...

/Jon

-- 
Jon Anthony
Organon Motives, Inc.
Belmont, MA 02178
617.484.3383
jsa@organon.com