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Subject: Re: std::colony name brainstorming
From: Jeremy Ong (jeremycong_at_[hidden])
Date: 2021-02-08 12:07:52


In the game engines I've worked in, this is basically a "pool" of objects
if that's helpful. Slab allocations are a common backing store. In fact, I
feel like the implementation of colony reads somewhat like a typical memory
allocator of fixed byte-size chunks. I would do this for textures allocated
from gpu vram of a fixed set of dimensions for example (e.g. the
512_texture_pool, etc.).

On Mon, Feb 8, 2021 at 11:02 AM Ben Craig <ben.craig_at_[hidden]> wrote:

> I don’t think colony has any kind of first-in-first-out scheme. If you
> initialize a colony with a lot of elements, then erase an element in the
> middle, then add an element, the new element isn’t added to the front or
> the end of the iteration order, but in that empty hole that was just
> created. Queue and Deque tell you where you can insert efficiently, and
> the iteration order, neither of which translate well to colony.
>
>
>
> *From:* Jeremy Ong <jeremycong_at_[hidden]>
> *Sent:* Monday, February 8, 2021 11:57 AM
> *To:* sg14_at_[hidden]
> *Cc:* Matt Bentley <mattreecebentley_at_[hidden]>; C++ Library Evolution
> Working Group <lib-ext_at_[hidden]>; Guy Davidson <guy_at_[hidden]>;
> Ben Craig <ben.craig_at_[hidden]>
> *Subject:* [EXTERNAL] Re: [SG14] std::colony name brainstorming
>
>
>
> Looking at this interface, is it correct to describe "colony" as just a
> "stable_deque"? The double-ended queue semantics of the contents are
> preserved by the skip list, and stability in the context of containers
> refers to memory stability as you point out. I'd like it if all the
> containers were grouped by suffix (e.g. associative containers are maps,
> lookup tables are sets, etc.)
>
>
>
> On Mon, Feb 8, 2021 at 10:44 AM Ben Craig via SG14 <sg14_at_[hidden]>
> wrote:
>
> The paper talks a lot about the name colony, and that the name “bag” isn’t
> a good fit. I want to see if we can have other good names (or name pieces)
> get discussed on the mailing list.
>
>
>
> For picking names, I like using a name as a way to compare and contrast
> against similar choices. Ideally, the name should indicate why you would
> use one facility over another.
>
>
>
> The big reasons I see to prefer colony over another container:
>
> - Pointer and iterator stability
> - Contiguous block storage for faster iteration (i.e. not a node based
> container)
> - O(1) inserts and deletes
> - Re-orderable / sortable
>
>
>
> Reasons to use other containers:
>
> - Contiguous elements
> - Sub-linear lookup
> - Sorted by default
> - User control over insert location
>
>
>
> I don’t see a good way to tease out the subtle contiguity differences in a
> short name. The stability aspect isn’t too hard though… “stable_<foo>” can
> communicate that… assuming we can find a suitable <foo>. The main downside
> to “stable_” is all the node based containers are already stable, but don’t
> have the prefix.
>
>
>
> I’m leaning towards “*stable_bundle*”. “bundle” communicates a bit of
> disorganization. It still sounds like a container (“a bundle of ints”). I
> don’t think it has strong precedence in CS unlike so many other names.
> “bundle” as the root is still rather arbitrary though. Neither part of the
> name communicates that fast iteration is a key aspect of the container.
>
>
>
> We could attempt to fill <foo> with something that indicates the expected
> implementation strategy. I’m less fond of that approach, but it can help
> communicate the design of the container. I can suggest “stable_skip_array”
> and “stable_skip_list”. I’m not overly fond of “array” or “list” in the
> names though, as they suggest layouts that aren’t entirely accurate (single
> large allocation and individual element allocation respectively). I’m not
> fond of “bucket” since that has precedence in our hash map apis, though I
> could live with “stable_bucket”.
>
>
>
> A thesaurus item to start from: https://www.thesaurus.com/browse/array?s=t
> <https://urldefense.com/v3/__https:/www.thesaurus.com/browse/array?s=t__;!!FbZ0ZwI3Qg!90c3YGxVgFdXEkLU6l1MkxJOCLXqB8obiNCsmlcVrS6lgnMkwlvLXHb-rhTh$>.
> I’ve browsed over list, container, and aggregate for other ideas.
>
>
>
> Are there other aspects of the container we should look at for naming?
> Any suggestions for affixes or roots for a multi-part name?
>
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