handful and interval

Walter Bright newshound2 at digitalmars.com
Sun Sep 2 21:47:13 PDT 2012


On 9/2/2012 4:40 PM, Andrei Alexandrescu wrote:
> On 9/2/12 10:24 PM, Walter Bright wrote:
>> On 9/2/2012 7:45 AM, Andrei Alexandrescu wrote:
>>> On 9/2/12 4:22 PM, Andrei Alexandrescu wrote:
>>> [snip]
>>>
>>> The alternative would be to simply define these as functions:
>>>
>>> if (a.among("struct", "class", "union")) { ... }
>>> if (b.between(1, 100)) { ... }
>>
>> Is between inclusive or not of the endpoints?
>
> After quite a bit of thought, I think inclusive is the right way.

Then there's no way to specify an empty interval. I suppose with "between" that 
would not be relevant.

> There are two
> reasons:
>
> 1. Ranges that end in e.g. float.max or int.max would not be expressible if
> bounds were not included.
>
> 2. SQL defines between to include the limits, which sets a precedent.
>
> Ranges are open to the right but I think intervals are quite different.
>
>
> Andrei




More information about the Digitalmars-d mailing list