Can't I allocate at descontructor?

[tsbockman]

On Friday, 5 March 2021 at 21:17:24 UTC, tsbockman wrote:
> On Friday, 5 March 2021 at 21:02:08 UTC, H. S. Teoh wrote:
>> 	class C {...}
>>
>> 	import core.memory : GC;
>> 	C c = cast(C) GC.malloc(C.sizeof);
>>      ...
>     ...
>     import core.memory : GC;
>     C c = cast(C) GC.malloc(C.sizeof);
>     ...

Also, that's not the correct way to manually allocate a class on 
the heap. C.sizeof is the size of a reference to C, not an 
instance of C, and we need to blit and construct the instance 
before it is safe to use:

     import core.memory : GC;
     C c = cast(C) GC.malloc(__traits(classInstanceSize, C));
     import core.lifetime : emplace;
     emplace(c, anyConstructorArgsGoHere);
     ...