Function errTop

error.go:29–42

errTop get important message from wrapped error message

(err error)

// errTop get important message from wrapped error message
func errTop(err error) error {
	for e := err; e != nil; {
		switch e.(type) {
		case ignore:
			return nil
		case causer:
			e = e.(causer).Cause()
		default:
			return e
		}
	}

	return nil
}