How do I choose the correct primative?

[TheFlyingFiddle]

On Monday, 6 January 2014 at 20:08:27 UTC, Jake Thomas wrote:
>> Things like Object.factory also pulls in it's fair share due 
>> to not being able to remove classes. So we get alot of fluff 
>> in small programs.
>>
>   What do you mean by not being able to remove classes?
>
>   Isn't the whole point of offering a language that has both 
> structs, which
>   can have functions, and classes to do away with classes when 
> inheritence
>   isn't needed?

Well since you could potentially create classes through 
Object.factory at runtime the code for unused classes will be 
compiled into the binary anyways this is even if you never use 
Object.factory directly in the code. I am not 100% sure but i 
think the main problem is ModuleInfo that keeps everything alive. 
And it keeps classes alive since they could be used by object 
factory. It also keeps other information like unittests locations 
and static constructors.

> What tools and parameters did you use to obtain that 
> dissassembly?

I used the visual studio dissassembly window.


> Can you tell whether a 32-bit load was used?


_Dmain:
		push	RBP
		mov	RBP,RSP
		mov	EAX,0Ah
		pop	RBP
		ret



----   mov EAX,0AH

This is a 32-bit instruction. 64-bit instructions use the RAX 
register.

It's actually the same register but it's just named diffrently 
depending if you use the full 64-bits or just the lower 32-bits. 
It will automatically zero extend it.

See https://github.com/yasm/yasm/wiki/AMD64 for a simple intro 
into x64.