Yes, I was surprised too.  It actually took me the better part of a day 
trying to get this to work before finally posting to the list.

It turns out that this limit was actually documented by Ian Lance Taylor 
back in February 2023:

https://github.com/golang/go/issues/58650

Look for the section entitled *"Inferring based on interfaces."*

Again, it sure would be nice it this were possible, if for no other reason 
than to keep others being as time-inefficient as I was while trying to 
figure it out. 

-Mike
On Sunday, October 22, 2023 at 11:01:47 PM UTC-4 tapi...@gmail.com wrote:

> On Monday, October 23, 2023 at 10:38:59 AM UTC+8 tapi...@gmail.com wrote:
>
> Sorry, I didn't look your full code.
> I think the full code should work with Go toolchain 1.21.n.
>
>
> Aha, it actually doesn't. I'm surprised.
>
>
> On Sunday, October 22, 2023 at 4:40:55 PM UTC+8 Mike Schinkel wrote:
>
> How so? 
>
> Can you give an example scenario where it could cause unintended 
> consequences?  Or some other negative?
>
> -Mike
>
> On Saturday, October 21, 2023 at 11:57:52 PM UTC-4 tapi...@gmail.com 
> wrote:
>
>
> It is hard to call such type inference better. That is too aggressive.
>
>

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