Generic operator overloading for immutable types?

[Gary Willoughby via Digitalmars-d-learn]

On Monday, 12 June 2017 at 20:10:17 UTC, H. S. Teoh wrote:
> Therefore, nowadays I always recommend writing parenthesis with 
> type modifiers, so that the intent it unambiguous, i.e., always 
> write `inout(Rational)` rather than `inout Rational`, unless 
> you intend for `inout` to apply to the function rather than the 
> return value. (And I apologize for the slip-up in my code 
> example above, where I failed to do this for the function 
> parameter.)
>
>
> T

Ok, thanks.