golang反射初始化满足接口的结构

Question

我可以通过某种反射摆脱开关吗？brand将始终匹配结构名称package mainimport "fmt"type Car interface {    Move()    SetModel()}type Ford struct {    Model string}type Volkswagen struct {    Model string}func (car *Ford) Move() {    fmt.Println(car.Model + " is moving!")}func (car *Ford) SetModel() {    car.Model = "Focus"}func (car *Volkswagen) Move() {    fmt.Println(car.Model + " is moving!")}func (car *Volkswagen) SetModel() {    car.Model = "Jetta"}func main() {    var car Car    brand := "Ford"    switch brand {    case "Ford":        car = &Ford{}    case "Volkswagen":        car = &Volkswagen{}    }    car.SetModel()    car.Move()}

Answer 1

您不能使用reflect仅从其名称的字符串生成类型，因此可能需要类型工厂的映射，但是根据您所说的需要，您可能希望以编程方式生成它go generate。它基本上会像这样工作：

var constructors = map[string]func() Car{

    "Ford": func() Car{

        return &Ford{}

    },

    "Volkswagen": func() Car{

        return &Volkswagen{}

    },

}

// ...

car := constructors[brand]()