Sizeof class instance

Jeremie Pelletier jeremiep at
Sat Oct 3 15:30:15 PDT 2009

Justin Johansson wrote:
> How does one determine the sizeof (in bytes) of an instance of a class in D?
> .sizeof works as advertised for structs, but for reference types,
> .sizeof yields the sizeof the referencing variable (effectively same as size of a pointer)
> and not the size of the underlying instance.
> I did try scanning the NG and read spec_D1.00.pdf.  Perhaps I missed it in the latter.
> btw. I was poking under the hood of std.xml and though, wow, instances of Element
> class look humongous, and so I'm interested to how exactly how humongous.
> Thanks for all help.
> Justin

The only way I know of is to access the init array of the classinfo at 
runtime and get its length property.

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