On Wednesday, 9 May 2018 at 14:07:37 UTC, Per Nordlöw wrote:
This prevents the trait `mustAddGCRangeOfStructOrUnion` [1]
from detecting when a container with manual memory management
doesn't have to be scanned by the GC as in, for instance,
enum NoGc;
struct S
{
@disable this(this); // disable S postlib
@NoGc int* _ptr;
}
static assert(!mustAddGCRangeOfStructOrUnion!S); // is
false when postblit of `S` is disabled
[1]
https://github.com/nordlow/phobos-next/blob/master/src/gc_traits.d#L81
Can we statically check if the postblit has been disabled via
@disable this(this);
?
If so, we can temporarily modify the trait to exclude the last
`void*` member of the `S.tuple`. Given that it's always added as
the last member.
