cmd/go2go: generic struct embedding doesn't seem to work as expected #39678
Description
I was playing arund in the go2go playground to see if I could generically add methods to a type,
using struct embedding, but it didn't work as I expected it would.
See the following example, it does not compile with an error: "./prog.go2:9: undefined: T",
but I think it should work correctly. I also can't use the BaseData type as I expected I could.
Is this by design or is there another way to do what I want to do?
package main
import (
"fmt"
)
// Trying to generically add methods to a data type.
type Base(type T) struct {
T
}
// The method generically implemented
func (b Base(T)) Foo() {
fmt.Printf("Foo: %v\n", b.T)
}
type Data struct {
Count int
}
type BaseData Base(Data)
func main() {
// p := BaseData{} : doesn't work
p := Base(Data){}
p.Count = 7
p.Foo()
}