返回返回类型匹配接口的回调时出错

Question

错误示例@play.golang.org：http ://play.golang.org/p/GRoqRHnTj6即使接口完全为空，以下代码也会返回“prog.go:16: cannot use NewMyGame (type func() MyGame) as type func() Playable in return argument”。也请找到下面附带的代码，不幸的是我完全被难住了，任何帮助将不胜感激。package main// Define an arbitrary game typetype MyGame struct{}// Create a constructor function for arbitrary game typefunc NewMyGame() MyGame {    return MyGame{}}// Define an interface defining game typestype Playable interface{}// In my app it will return a list of constructors matching interfacefunc Playables() func() Playable {    return NewMyGame}func main() {}

Answer 1

就像错误所说的那样，

cannot use NewMyGame (type func() MyGame) as type func() Playable

一个简单的解决方法是

func Playables() func() Playable {

    return func() (Playable) {

        return NewMyGame()

    }

}