Getting byte size of POD classes and dynamic arrays

[Byron Heads]

On Thu, 16 May 2013 08:11:35 -0500, 1100110 wrote:

> On 05/16/2013 08:09 AM, Byron Heads wrote:
>> I am working on d-leveldb wrapper (https://github.com/bheads/d-leveldb)
>> and I need to be able to pass blocks of data between D and leveldb API.
>> I am having rouble getting the byte size of dynamic arrays and POD
>> classes.
>> 
>> I can get the right size for 1D dynamic arrays, need a way to compute
>> the total size.
>> 
>> POD Classes always give me the size of the ref, is it possible?
>> 
>> -Byron
> 
> 
> __traits(classInstanceSize, MyClass); ?

I missed that one, in my test it returns 29 bytes,
8 for __vptr
8 for __monitor
13 for data

now I am wondering way a POD has a vtable.  Either way its not safe to 
store a byte copy in to leveldb