Golang更改指针接口的类型

Question

I have a function which returns a slice of pointers of some interface. I want to change the type later in the code to the implementation type but nothing works, I still get an invalid type assertion.

Example

func Test(c Parsable)([]*Parsable, error) {
   // generate slice by factory method on Parsable inteface and return slice
}

var implParsable ImplParsable
results, err := Test(implParsable) 

data := results[0].(ImplParsable) // I tried this in many variations but nothing works

Answer 1

resultSets[0] is a pointer to an interface, so you need to dereference that pointer to get the interface value, which you can do inline since slice values are addressable.

data :=  (*resultSets[0]).(ImplParsable)