The reason is the *name* value is not assigned to *string* (the built-in
type).
It is assigned to *interace{}*. Please read the docs of fmt.Println for
details.
On Friday, January 11, 2019 at 4:54:12 PM UTC-4, 伊藤和也 wrote:
>
> type name string
>
> /*func (n name) upper() string {
> return strings.ToUpper(string(n))
> }
>
> func (n name) lower() string {
> return strings.ToLower(string(n))
> }*/
>
> func main() {
> fmt.Println(name("john"))
> }
>
>
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