On 10/30/2015 10:44 PM, deadal nix wrote:

I don't think the case for baking @rc into the language has been made at
this point. Providing guarantee about escaping is necessary and
sufficient to build RC. Providing more needs to be justified. Right now,
the only reason I've seen for this is optimization, but intrinsics are
largely sufficient for this, and don't even need to be standardized.

Providing guarantees about escaping is not necessary except for optimizations. The reason for baking @rc into the language is that we want to be able to @safely escape the 'this' reference for reference-counted classes. I don't know if this is a strong enough case, but that does not prevent the DIP from being written. I think @rc does not conflict with type system features for managing lifetimes.

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