func (f *NsFile) Walk(elem ...string) (*NsFile, error) {
seq, results := seq.NewSequencer()
go func() {
<-results // Walk
_, ok := <-results
if ok {
panic("expected closed")
}
}()
f = f.SeqWalk(seq, elem...)
seq.Do(nil, nil)
if err := seq.Wait(); err != nil {
return nil, err
}
return f, nil
}
func (f *NsFile) ops(ops ...seq.Req) ([]seq.Result, error) {
c := make(chan OpResults)
seq, replies := seq.NewSequencer()
go func() {
r, ok := <-replies
if !ok {
c <- nil
}
_, ok = <-replies
if ok {
panic("expected closed")
}
c <- r.(OpResults)
}()
f.seqops(seq, ops...)
seq.Do(nil, nil)
r := <-c
return r, seq.Wait()
}