Storage Class "in" D

Question

When using the in storage class in D, the data is immutable for your function. Is it also passed in the data by reference, and not by value? I noticed that in ref not valid.

If in does not transmit data by reference, is there a way to get data by reference, but do you have a guarantee that the data will not be changed?

Answer 1

in parameters are not passed by reference .

As far as I can tell from the documentation , in is just a shortcut to const scope . I do not see the possibility of emulating ref in parameters, since ref scope is illegal. As BCS said, you can use ref const if you don't need the scope storage class.

Answer 2

I have not tested, but I think that ref const should work.