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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Anybody in US using ADA ? One silly idea..
Date: Sun, 19 Jan 2003 13:34:40 +0100
Organization: At home
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Date: 2003-01-19T13:34:40+01:00
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Hyman Rosen wrote:

> Dmitry A. Kazakov wrote:
>> If not possible, then it is not a case where generics may be applied. My
>> point is, anywhere generics work, the specific type can be tacked down.
> 
> That doesn't seem correct to me. With generics, I can declare a container
> that holds a specific type, and then pas sthat container around to other
> (generic) routines, and they all know the type of the container's
> contents.
> 
> Without generics, all I have is a container that holds some base type. How
> is the compiler to know that this container holds only a certain specific
> type of object?

I see your point. Well, this is another story. I meant containers of 
class-wide objects. What you meant is the containers of specific types like 
arrays are. Though it looks like a simplier problem, it is unsolvable in 
the way I proposed. Here generics or built-in container types are the only 
options. Anyway array types solve this for one particular case without 
generics. Maybe, there is a more general way to deal with the containers of 
all kinds without generics. I do not know.

-- 
Regards,
Dmitry A. Kazakov
www.dmitry-kazakov.de