_, ok := r.(WriterTo)
_, ok := r.(WriterTo)
// NopCloser returns a ReadCloser with a no-op Close method wrapping
// the provided Reader r.
// If r implements WriterTo, the returned ReadCloser will implement WriterTo
// by forwarding calls to r.
func NopCloser(r Reader) ReadCloser {
if _, ok := r.(WriterTo); ok {
return nopCloserWriterTo{r}
}
return nopCloser{r}
}
