DIP 1016--ref T accepts r-values--Formal Assessment

[bitwise]

On Monday, 4 February 2019 at 18:32:56 UTC, Dominikus Dittes 
Scherkl wrote:
> I don't understand this.
> What does "(return)?" mean? Is this valid D syntax? What do I 
> miss?

I meant for that to be interpreted like a Regular expression, 
denoting conditional presence of the return statement. I'm not 
sure what the proper notation would be to express such a thing.