I have a structure like, used by other structures:
struct A {
int[] data;
this(this) { data = data.dup; }
}
I am trying to upgrade it to use copy constructor:
struct A {
int[] data
this(ref return scope A rhs) { data = ths.data.dup; }
}
Generating an `inout` copy constructor for `struct B` failed,
therefore instances of it are uncopyable
What is an `inout` copy constructor? What should I change in A?
