bug#49407: Request: Specify default values in `map-let` in Map.el

[Stefan Monnier]

>> However, I have a question about avoiding using a lambda. I see that
>> the pattern uses `pcase--flip`, which is "used internally to avoid
>> (funcall (lambda ...) ...)". Why should lambda functions be avoided
>> for this,
> As far as I understand, to produce more efficient code.

Indeed.

>> and I should be using a custom helper function for this one pattern?
> Stefan, would you want to extend `pcase--flip' to more arguments to
> support this case?

Probably not worth it, no.


        Stefan