Re: DIP77 - Fix unsafe RC pass by 'ref'

[Walter Bright via Digitalmars-d]

On 4/10/2015 2:11 PM, Martin Nowak wrote:

On 04/09/2015 01:10 AM, Walter Bright wrote:

http://wiki.dlang.org/DIP77

In the first problem example:

  struct S {
      RCArray!T array;
  }
  void main() {
      auto s = S(RCArray!T([T()])); // s.array's refcount is now 1
      foo(s, s.array[0]);           // pass by ref
  }
  void foo(ref S s, ref T t) {
      s.array = RCArray!T([]);      // drop the old s.array
      t.doSomething();              // oops, t is gone
  }

What do you do to pin s.array?

auto tmp = s;

or

auto tmp = s.array;

The latter.