Generators

[Paul Sandoz]

On Jan 4, 2013, at 2:37 PM, Joe Bowbeer <joe.bowbeer at gmail.com> wrote:

> I was assuming an open range:
> 
>  ints().limit(25) == range(0, 25)
> 

Me too.


> 
> But good point regarding MAX_VALUE.  Because of this, a closed range may be
> a better idea?
> 

I prefer the correlation with limit. Perhaps we need another method rangeClosed?


> It would permit the generation of MAX_VALUE, avoiding failures like the
> following:
> 
>  range(0, Integer.MAX_VALUE + 1); // ?!
> 
> 
> Is range(0, 0) spec'd?

Returns an empty stream?


> Is range(0, -1) spec'd?
> 

Negative step value of -1 inferred?

Paul.


> 
> On Fri, Jan 4, 2013 at 4:59 AM, Paul Sandoz <paul.sandoz at oracle.com> wrote:
> 
>> 
>> On Jan 3, 2013, at 10:00 PM, Brian Goetz <brian.goetz at Oracle.COM> wrote:
>> 
>>>> To be clear: range and ints() are the only remaining int generators?
>>> 
>>> Ranges: there's a "stepping" version of range too.
>> 
>> Should the upper bound of range be open or closed? For the current
>> implementation it is open but means one can never iterate to MAX_VALUE.
>> 
>> May be stating the obvious here but we also need to support negative
>> ranges and step values.
>> 
>> Paul.