It's neat, but I don't think it does the same as Zig's comptime. For one it doesn't have Zig's dynamic behavior, nor more practically compile time reflection.

It's neat, but I don't think it does the same as Zig's comptime. For one it doesn't have Zig's dynamic behavior, nor more practically compile time reflection. Rust can't have Zig's comptime dynamic properties, same way Zig will never have Rust's compile time guarantees*. You can't simultaneously have your dynamic cake and eat it at compile time. * Theoretically you can have it, but it would require changing language to such extent it's not recognizable.