UFCS syntax I never saw before.

[aliak]

On Tuesday, 22 May 2018 at 13:59:16 UTC, Steven Schveighoffer 
wrote:
> The derailed plan was to leave alone the ability to call no-arg 
> functions without parentheses, but to REQUIRE @property to call 
> an argument-taking function with the assignment style.
>
> See the DIP here: https://wiki.dlang.org/DIP23
>
> Written by Walter and Andrei. I can't remember why it didn't 
> happen.
>
> -Steve

Aha. Thanks for the link!

It feels like the only difference between a no-arg function that 
is @property and one that is not is that the former could be 
invoked with optional parentheses and the latter should be 
illegal with parentheses.

Whereas an argument taking function marked as @property should 
probably allow read or write operations depending on whether or 
not it's invoked with an implicit first argument or not:

@property int f(int) { ... }
1.f; // read op
f = 1; // write op

And to make parentheses illegal as well of course.