1. type write interface {
    2.     puts()
    3. }
    5. type member struct {
    6.     name string
    7.     age  int
    8. }
    10. func NewMember(name string, age int) *member {
    11.     return &member{
    12.         name: name,
    13.         age:  age,
    14.     }
    15. }
    17. func (m *member) puts() {
    18.     fmt.Println(m.name)
    19. }
    21. func (m *member) readSth() {
    22.     fmt.Println(m.age)
    23. }
    25. func testPutsAndRead(write write) {
    26.     if m, ok := write.(interface{ readSth() }); ok {
    27.         m.readSth()
    28.     }
    29.     write.puts()
    30. }
    32. var _ write = (*member)(nil)
    34. func main() {
    35.     m := NewMember("test Name", 19)
    36.     testPutsAndRead(m)
    37. }