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From: john.mccabe@emrad.com.nospam (John McCabe)
Newsgroups: comp.lang.ada
Subject: Re: on package naming, should the word
Date: Tue, 16 Oct 2001 12:49:52 GMT
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Date: 2001-10-16T12:49:52+00:00
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On Mon, 15 Oct 2001 20:26:35 GMT, Ted Dennison<dennison@telepath.com>
wrote:

>The way I was taught it, an "object" consists of a data type, together with the
>operations on that type. Since a package is one means of encapsulating both
>those things into one concept, it can indeed be considered an "object".

For a generic package, sure, but not a non-generic package. An object
is a specific instance of a more generalised entity. The more
generalised entity may be a user-defined or language-defined type, a
Class (e.g in C++ and Java) etc.

A (non-generic) package is simply a means of encapsulating something
that can be instantiated as an object - e.g. a tagged type.
Conceptually Java's package mechanism is similar to Ada's in this
respect (although a bit naff) because Java Packages encapsulate
Classes and Interfaces that can be instantiated (or implemented) in
user programs - an Ada package encapsulated e.g. tagged types that can
be instantiated by user programs.