On Thursday, 23 November 2017 at 15:26:03 UTC, Timoses wrote:
A member;
this(A a)
{
this.member = a; // specifically aiming towards this
assignment...
That's not assignment, that's construction.
opAssign is only called when you assign over a struct object that
already exists. If there isn't an existing object in the variable
already, it instead calls a constructor.
A a = A(); // construction, there is no existing a to call
A a; // construction done here...
a = x; // so this is now assignment over the existing object
Sometimes, they look the same, as in your case, but since you are
assigning a member for the first time inside a constructor, it
still counts as construction of the child object instead of
assignment over an existing object.
