Uniform function call syntax

[brson]

Don't see an issue for this. Would like to be able to treat methods like any other function, by providing self explicitly.

[lilyball]

cc me

[brson]

Nominating since this could block #11878.

[nikomatsakis]

cc me

[pnkfelix]

Assigning P-high, but not 1.0.

[nikomatsakis]

Thanks to @eddyb's tireless efforts, this should be relatively close
to reality: in simple cases, I imagine all we have to do is update
resolve. Not sure if there are more complex cases.

[ben0x539]

Is this about being able to write SomeTrait::trait_method(self_ptr, ...) and SomeType::inherent_method(self_ptr, ...) or for first_argument.some_free_function(...) like in D?

[Kimundi]

@ben0x539: The first two.

[japaric]

The UFCS RFC has been accepted, and #16293 is tracking its implementation.

Should this be closed in favor of that issue?

[nrc]

Closing as a dup of #16293