Hello, everyone.
Consider following code:
package main
import "fmt"
type implementation struct {
d []int}
func (impl *implementation) getData() interface{} {
return impl.d}
type phase struct{}
type data interface {
getData() interface{}}
func MakeIntDataPhase() *phase {
return &phase{}}
func (p *phase) run(population []data) []data {
return nil}
func main() {
var population []implementation
MyPhase := MakeIntDataPhase()
fmt.Println(MyPhase.run(population))
}
When running following code in playground I got following error: prog.go:30:25:
cannot use population (type []implementation) as type []data in argument to
MyPhase.run
If I understand correctly it is because slice of interface type cannot be
converted by the compiler to concrete type.
What is correct way in golang to implement functionality that is presented in
the example?
When method argument defined using a slice of some interface, how I can pass it
a slice of a concrete type that implements the interface?
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