pub type QNWorker<'a,Task>=CompatNWorker<'a,Task>; pub type INWorker<'a,Task>=CompatNWorker<'a,Task>; pub struct CompatNWorker<'a,Task>{ data:std::marker::PhantomData, f:Box, } impl<'a,Task> CompatNWorker<'a,Task>{ pub fn new(f:impl FnMut(Task)+'a)->CompatNWorker<'a,Task>{ Self{ data:std::marker::PhantomData, f:Box::new(f), } } pub fn send(&mut self,task:Task)->Result<(),()>{ (self.f)(task); Ok(()) } }