[Cuis-dev] [ChangeSet] source code intervals + changes on refactorings

[Phil B]

Nicolas,

On Mon, May 11, 2020 at 5:02 PM Nicolas Cellier via Cuis-dev <
cuis-dev at lists.cuis.st> wrote:

>
>
> Le lun. 11 mai 2020 à 22:58, Luciano Notarfrancesco via Cuis-dev <
> cuis-dev at lists.cuis.st> a écrit :
>
>>
>>
>> On Tue, 12 May 2020 at 3:44 AM, Nicolas Cellier via Cuis-dev <
>> cuis-dev at lists.cuis.st> wrote:
>>
>>> Can you represent empty ranges?
>>>
>>> For example,
>>> (5,5) could be empty (marking a position before or after 5th character -
>>> your choice)
>>>
>>
Definitely.  That's why start<=end.  Needed for things like errors where
you might only essentially know the position something occurred at but need
to return a range for whatever reason.


> (5,6) a one character range (from left to right)
>>>
>>
Yep.


> (5,4) too (from right to left).
>>>
>>
My thinking was that this could get swapped during instance creation.  If
end<start, then swap. (i.e. only for source code ranges would start<=end
always be the case, the more general range superclass would allow the
inversion)


>> Good question. Kind of looks like a pathological case, do you really need
>> that? Is it for the cursor position?
>>
>> For example if we want to use that Range in Text selection, then yes.
>

While the text could be selected from end to start, would anything be lost
by flipping the positions around in the range created?


>
>
>>> Le lun. 11 mai 2020 à 01:22, Phil B via Cuis-dev <cuis-dev at lists.cuis.st>
>>> a écrit :
>>>
>>>> Luciano,
>>>>
>>>> Since the vast majority of ranges I'd be working with are
>>>> programmatically created, #.. wouldn't really help me (i.e. Range #from:to:
>>>> would be fine and consistent with Interval in meaning) but I'm not opposed
>>>> to it if it would help you.  However, I would not be in favor of
>>>> overloading #, since that seems confusing given other implementors of #,.
>>>>
>>>
>> Yeah, I wouldn’t want to overload #, and my suggestion about #.. mainly
>> was about allowing it as a binary operator that might be nice to have
>> available for whatever people decide to use it. #from:to: looks nice
>> enough, tho.
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