Method SetOutput

flag.go:297–299

SetOutput sets the destination for usage and error messages. If output is nil, os.Stderr is used.

(output io.Writer)

// SetOutput sets the destination for usage and error messages.
// If output is nil, os.Stderr is used.
func (f *FlagSet) SetOutput(output io.Writer) {
	f.output = output
}

// VisitAll visits the flags in lexicographical order or
// in primordial order if f.SortFlags is false, calling fn for each.