DIP77 - Fix unsafe RC pass by 'ref'

[Walter Bright via Digitalmars-d]

On 4/10/2015 11:28 AM, "Marc =?UTF-8?B?U2Now7x0eiI=?= <schuetzm at gmx.net>" wrote:
> Example:
>
> void foo() @safe {
>      RCArray!int arr = [0,1,2];
>      {
>          int* p = &arr[0];  // legal under new scope rules

This would be a bad design of an RCO. RCO's must be constructed to not allow 
pointers to the payload other than by ref.

>          RCArray!int other;
>          arr = other;
>          writeln(*p);       // OOPS
>      }
> }