simple question about UFCS and templates...wasFound(i) works but not i.wasFound()

[Paul Backus]

On Thursday, 20 March 2025 at 02:01:25 UTC, Jonathan M Davis 
wrote:
> On Wednesday, March 19, 2025 5:48:37 PM MDT H. S. Teoh via 
> Digitalmars-d-learn wrote:
>> I thought it was always a miss. :-D  At least, it's never 
>> worked for me every time I tried it.  I always have to move 
>> the UFCS function to module scope, then it works.
>
> AFAIK, it's always a miss. There's a bug report somewhere where 
> Kenji explained exactly why it works the way that it does, but 
> I don't recall what he said. I also don't know if it was closed 
> as "won't fix" or remember much that would make it easy to 
> find, unfortunately. :|
>
> But there is a technical reason for the limitation, even if I 
> don't remember what it is.

It's to prevent UFCS functions from being shadowed by local 
variables. From the spec:

> Rationale: Local function symbols are not considered by UFCS to 
> avoid unexpected name conflicts.

https://dlang.org/spec/function.html#pseudo-member