On 8/15/17 10:42 AM, Kagamin wrote:
https://github.com/dlang/phobos/blob/master/std/variant.d#L623
memcpy(&store, cast(const(void*)) &rhs, rhs.sizeof);
should be ok to cast unconditionally
Agreed, the T value being copied has already been copied onto the stack,
so it's not really shared.
However, I'm not sure about the postblit being called afterward. Does a
postblit need to be marked shared in order to work for shared types?
I think also I understand why it's working for shared int* but not
shared int -- IFTI automatically infers tail-modified for such things to
cut down on instantiations. tail-modified means the head is not shared
(which is in this case more accurate). This means the cast is not
necessary, since you are copying unqualified data.
-Steve
