Struct that destroys its original handle on copy-by-value

[Ali Çehreli via Digitalmars-d-learn]

On 07/26/2015 04:29 AM, Joseph Rushton Wakeling via Digitalmars-d-learn 
wrote:

 > is this design idea even feasible in principle, or just a bad
 > idea from the get-go?

As I understand it, it is against one of fundamental D principles: 
structs are value types where any copy can be used in place of any other.

I expect there are examples where even Phobos violates it but the struct 
documentation still says so: "A struct is defined to not have an 
identity; that is, the implementation is free to make bit copies of the 
struct as convenient."

   http://dlang.org/struct.html

 > And if feasible -- how would I go about it?

Disallowing automatic copying and providing a function comes to mind.

Ali