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bug#25592: Feature request: sorting overlays


From: Clément Pit--Claudel
Subject: bug#25592: Feature request: sorting overlays
Date: Fri, 3 Feb 2017 10:19:15 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0

On 2017-02-02 15:43, Eli Zaretskii wrote:
>> Cc: address@hidden
>> From: Clément Pit--Claudel <address@hidden>
>> Date: Thu, 2 Feb 2017 14:41:21 -0500
>>
>> I'm writing a function that copies overlay properties to text properties.
> 
> That function probably converts overlays by traversing buffer
> positions from beginning to end, no?  Then overlays-at should be what
> you need, and next-overlay-change is your friend to move to the next
> "interesting" position when you are done with this one.
> 
> Isn't that what you are doing?

No: I'm iterating over all overlays, and applying them one by one.

>> I reimplemented compare_overlays in ELisp, but that seems brittle.
> 
> How did you implement in Lisp the "last resort" of comparison, which
> compares addresses of the C structs?

I didn't :)

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