"Best" way of passing in a big struct to a function?

[Val Markovic]

On Wednesday, 10 October 2012 at 04:55:48 UTC, Val Markovic wrote:
> Oh, and a related question: what is the best way to pass in an 
> associative array like CustomStruct[string]? I can't say I'm 
> too clear on how AA's are managed/implemented. Do they have 
> value semantics or reference semantics? What about lists?

Ok, feel free to disregard this question; I just checked TDPL 
(should have done that first) and it clearly says that AA's  
follow reference semantics. Dynamic arrays passed to functions 
actually pass in a light-weight object referring to the same 
underlying data (I'm guessing that a dynamic array is internally 
"nothing more" than a struct holding a pointer and a length, 
right?).