Re: My Reference Safety System (DIP???)

[Zach the Mystic via Digitalmars-d]

On Sunday, 1 March 2015 at 14:40:54 UTC, Marc Schütz wrote:
I don't think a callee-based solution can work:
    class T {
        void doSomething() scope;
    }
    struct S {
        RC!T t;
    }
    void main() {
        auto s = S(RC!T()); // `s.t`'s refcount is 1
        T t = s.t;          // borrowing from the RC wrapper
        foo(s);
        t.doSomething();    // oops, `t` is gone
    }
    void foo(ref S s) {
        s.t = RC!T();       // drops the old `s.t`
    }

I thought of this, and I disagree. The very fact of assigning to 
`T t` adds the reference count you need to keep `s.t` from 
disintegrating. As soon as you borrow, you increment the count.