From: Hal Fulton <hal9000@...>
Date: 2003-11-27T07:05:05+09:00
Subject: Re: Time#succ ?

Paul Brannan wrote:
> On Mon, Nov 24, 2003 at 05:36:49AM +0900, Hal Fulton wrote:
> 
>>Should this be added? It would enable the creation
>>of Time ranges like t1..t2 and so on.
> 
> 
> Does this not already work?
> 
> [pbrannan@zaphod ruby]$ irb
> irb(main):001:0> t = Time.now
> => Wed Nov 26 16:27:46 EST 2003
> irb(main):002:0> (t .. t+1)
> => Wed Nov 26 16:27:46 EST 2003..Wed Nov 26 16:27:47 EST 2003
> 
> (the problem only comes if you want to iterate over the range, which
> seems to me to be an ill-defined operation).

Hmmm. For some reason I thought that to have a Range, the
endpoint objects had to know #succ.

Apparently Time ranges do work fine. I don't know why I
never thought of them before.

As for iterating: I agree it's ill-defined, but I think it's
reasonable to let t.succ be the same as t+1 (since the latter
is already meaningful).

But since I can construct a Time range and call include? on it,
I suppose that's all we really need.

Hal