On Sunday, 28 February 2021 at 07:05:27 UTC, Jack wrote:
I'm using a windows callback function where the user-defined
value is passed thought a LPARAM argument type. I'd like to
pass my D array then access it from that callback function. How
is the casting from LPARAM to my type array done in that case?
for example, I need something like this to work:
int[] arr = [1, 2, 3];
long l = cast(long) cast(void*) arr.ptr;
int[] a = cast(int[]) cast(void*) l;
Should already work like that. Just be aware that array can be
garbage collected if no references for it are kept somewhere else
between set callback and the actual call, otherwise you can get
some random garbage.
Also be aware that such casts 99% basically a speculation, there
is no guarantee that returned data is actually an int[].
