Revised RFC on range design for D2

[Pablo Ripolles]

Bill Baxter Wrote:

> On Sat, Sep 13, 2008 at 1:03 AM, Pablo Ripolles <in-call at gmx.net> wrote:
> >> Hmm.  One semantic issue I have is that the tip usually refers to the
> >> infinitessimal point at the end.  Not a thing with substance.  I'm
> >> having trouble feeling like I'm going to get an item back when I look
> >> at "x.tip".  Head has huge history being used for the item at the
> >> front of a list, so I think that's much less likely to cause anyone
> >> looking at D code to scratch their heads.  It will be obvious what it
> >> means even in relative isolation.  head/tip will often appear without
> >> "toe" in forward range algos.  So you need to be able to easily
> >> recognize what "tip" means without seeing that "toe" to give context.
> >> Toe on the other hand will probably almost always appear with his
> >> mate.
> >>
> >> Ooh, another scale thing, but a head is obviously a very different
> >> scale than a toe.  A foot is closer to the same scale.  Maybe
> >> head/foot is better than head/toe.  The connection between retreating
> >> / feet is stronger that retreating / toes, too!
> >>
> >> --bb
> >
> > neither the tip of the tail, nor the tip of the wing, nor the tip of the flagellum are really infinitesimal...
> >
> > I'm not sure whether I understand your reasoning about the "tip" / "toe", I interpreted that "tip" could be a substitute of "toe"...
> 
> Nope.  I'm pretty sure that the discussion is about replacing "head"
> with "tip".  There's an expression "from tip to toe".

:D yes! ok! I missed that! sorry.

> 
> But I think your confusion (or is it mine?) about which end would be
> the tip is pretty damning.

I agree with that! indeed it is.

> 
> > my problem with foot is that there is necessarily more than one.
> 
> There's also more than one toe.  But I guess you thought that "toe" was out.

Exactly!

> 
> > perhaps in the world of the anatomy of the chordates we can find something... dunno, "coccyx" is pretty weird but at least there is only one.
> 
> Well, there is only one tail... but it's what functional guys call
> everything but the head, so Anrdrei wants to avoid it.

Yes, thanks, I didn't really now that was the reason but I do agree.  My last idea was the pair "head" and "aft"...

Cheers!