On Thursday, 25 October 2018 at 12:25:37 UTC, Eduard Staniloiu
wrote:
As I wrote in the comments above, I was expecting `a[] = b[]`
to iterate the slices and assign the elements of b into a.
What really happens is a memcpy: as you can see from godblot
[0], this gets lowered to a call to `_d_arraycopy`, in druntime.
In D, when you assign one aggregate to another, opAssign is only
called for the aggregate, not for any of its elements. However,
postblit constructors are called for both. Example:
https://run.dlang.io/is/XfDaWw
Your example will work as expected if you change the opAssign to
a postblit constructor: https://run.dlang.io/is/HBbGO2
