英文:
Go conditional pointer value
问题
我在程序中有几个结构体。我有一个指针，应该根据条件指向其中一个结构体。这是一个简短的非功能示例：
type Struct1 struct {
name string
}
type Struct2 struct {
name string
}
func main() {
var outputDevice
switch inputValue {
case "one":
outputDevice = &Struct1{name: "name"}
case "two":
outputDevice = &struct2{name: "name"}
}
}
请注意，这两个结构体都有一个共同的接口：
type Output interface {
Print() error
}
有关如何解决这个问题的任何想法吗？
英文:
I have a couple of structs in a program. I have a pointer that should conditionally point to one of these structs. Here is a short non-functioning example:
type Struct1 struct {
name string
}
type Struct2 struct {
name string
}
func main() {
var outputDevice
switch inputValue {
case "one":
outputDevice = &Struct1{name: "name"}
case "two":
outputDevice = &struct2{name: "name"}
}
}
Note, both of the structs have a common interface:
type Output interface {
Print() error
}
Any ideas about how to tackle this problem.
答案1
得分: 1
这正是接口的用途。
如果你的两种类型已经共享一个公共接口，那么将你的变量声明为接口类型：
var outputDevice Output
英文:
This is exactly what interfaces are for.
If your two types already share a common interface, than make your variable of the interface type:
var outputDevice Output
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