Passing ref T[n] to C

[bearophile]

Mike Parker:

> I was  expecting the length field to get in the way, but it
> didn't seem to.

If you pass a fixed-sized array by ref it only passes the 
pointer. The length is not passed, it's a compile-time known 
value.


> My question is, can I rely on this? Is there a guarantee that a 
> ref static array parameter will be compatible with a C array 
> pointer on every platform and architecture?

While the semantics of "ref" if fixed, I don't remember if the 
standard D ABI specifies how "fixed-sized array by ref" is 
implemented.

Bye,
bearophile