On Sunday, 1 March 2015 at 23:56:02 UTC, Zach the Mystic wrote:
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.
I'm sure many inc/dec can still be removed.
