Golang the method of determining whether to implement the interface interface

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Due to the Golang interface use is very flexible, do not need to display the implementation of the interface interface method, a little dynamic feeling,

Disadvantage: If you do not implement interface method, forcibly converted to interface, run time abnormal error

Workaround: At compile time to throw this error, on the code:

package mainimport ("fmt")type value interface {Show()}type test_value struct{}// func (value *test_value) Show() { fmt.Printf("test \n") }var _ value = new(test_value) // 使用类似方法处理，编译的时候会报错func main() {}// -------------------------------- Error Msg -------------------------------- //./test.go:18: cannot use new(test_value) (type *test_value) as type value in assignment:    *test_value does not implement value (missing Show method)// 如果把接口的方法注释掉，编译的时候就会报错// ------------------- 总结来说 --------------- type T struct{}var _ I = T{}其中 I为interface// 上面用来判断 type T是否实现了I,用作类型断言，如果T没有实现借口I，则编译错误.