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From: lutz@iks-jena.de (Lutz Donnerhacke)
Newsgroups: comp.lang.ada
Subject: Re: Container reqs
Date: Mon, 15 Oct 2001 14:39:55 +0000 (UTC)
Organization: IKS GmbH Jena
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* Ehud Lamm wrote:
>* From my experiens the item type is best accepted as a generic paramter (I
>say this, before anyone suggests and "Object" type, and we start fighting
>over MI)

   type Item is (<>) tagged abstract limited private;

in order to build collections of tasks and more.

   type Item is exception;

*grin*

Bute seriosly it's necessary, that the same item occurs in several
collections at once. It must be possible to build stacks of lists and hold a
task element in a list and a hash simultaniously. Good luck.

>* The library should offer Algortihms (in STL-speak): sorting, searching
>  etc.

Of course ... provide algorithms with different size/time constraints.
_Prove_ them correctly and derivate the size/time constraints.
Do not assume special derivations for those algorithms, so allow algorithms
over native Ada types.

>* Standard iteration schemes over the various containers (I want both active
>and passive versions)

Keep them threadsafe and multiaccessed, i.e. allow the usage of active
Iterator to create further Iterators which in turn modify the structure.

>* Since I am thinking about using the library in education, I'd prefer to
>  make isntantaion as easy as possible (possibly, by supplying
>  pre-instantiated versiosn).

Exactly.

>  I also prefer to hide the tagged nature of interface relationships

Tagged nature?