8 // ErrorFormatFunc is a function callback that is called by Error to
9 // turn the list of errors into a string.
10 type ErrorFormatFunc func([]error) string
12 // ListFormatFunc is a basic formatter that outputs the number of errors
13 // that occurred along with a bullet point list of the errors.
14 func ListFormatFunc(es []error) string {
15 points := make([]string, len(es))
16 for i, err := range es {
17 points[i] = fmt.Sprintf("* %s", err)
21 "%d error(s) occurred:\n\n%s",
22 len(es), strings.Join(points, "\n"))