Hi Robin,

> On 28 Aug 2026, at 16:03, Robin Dapp <[email protected]> wrote:
> 
>>>> Sorry, I get it now.  Doubling nelts to force an operation would
>>>> unnecessarily penalise folds of known single-element vectors,
>>>> which really don't raise an exception.
>>>> 
>>> 
>>> Yeah, that’s the idea.
> 
> Sorry to chime in here but could we add a one-sentence comment 
> documenting the idea?  It wasn't exactly obvious to me either.
> 

Something like the attached?
Thanks,
Kyrill

> -- 
> Regards
> Robin
> 


Attachment: 0001-fold-const-call-Explain-singleton-sNaN-handling-PR12.patch
Description: 0001-fold-const-call-Explain-singleton-sNaN-handling-PR12.patch

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