I don't care performance a lot if it's sane enough. At least for me, I would use Rust if it supports (1) safe and nice symmetric coroutine with automatically g

I don't care performance a lot if it's sane enough. At least for me, I would use Rust if it supports (1) safe and nice symmetric coroutine with automatically growing stack (2) devices for correct programming - such as const-correctness. (3) a device guarantees safe communication between threads - like Go channel. (4) stable implementation. (5) full support for C interop. AFAIK, Rust now has all except #4. So I am waiting it to be stabilized. Actually I want something like C++ with symmetric coroutine, but D is too unstable for coroutine…