Comment on Rust Any part 3: we have upcastsparentComments−BrainInAJar1y"sometimes" is doing a lot of work there.Sometimes it is, but also sometimes it isn't, and Rust at least gives you a choice (you can use Arc all over the place, or if performance is critical you can be more careful about specifying lifetimes)−jtrueb1yArc doesn’t give you the choice until this upcasting feature lands in stable.
Comments
"sometimes" is doing a lot of work there.
Sometimes it is, but also sometimes it isn't, and Rust at least gives you a choice (you can use Arc all over the place, or if performance is critical you can be more careful about specifying lifetimes)
Arc doesn’t give you the choice until this upcasting feature lands in stable.