英文:
How do I convert a generic struct to the same generic struct of a different type in Golang?
问题
让我们直接看一段代码。
type Animal[T any] struct {Name stringType stringParams T}type DogParams struct {TailLength int}type CatParams struct {MeowVolume int}type Dog = Animal[DogParams]type Cat = Animal[CatParams]type Tiger = Animal[CatParams]var animals = []Animal[any]{{Name: "biggie doggie",Type: "dog",Params: DogParams{TailLength: 5},},{Name: "persia",Type: "cat",Params: CatParams{MeowVolume: 2},},}
将Animal[any]转换为Animal[CatParams]的最佳方法是什么？
我尝试了以下代码：
cat, ok := any(animals[1]).(Cat)
但是它不起作用。
提前感谢！
英文:
Lets jump straight into a code snippet.
type Animal[T any] struct {Name stringType stringParams T}type DogParams struct {TailLength int}type CatParams struct {MeowVolume int}type Dog = Animal[DogParams]type Cat = Animal[CatParams]type Tiger = Animal[CatParams]var animals = []Animal[any]{{Name: "biggie doggie",Type: "dog",Params: DogParams{TailLength: 5},},{Name: "persia",Type: "cat",Params: CatParams{MeowVolume: 2},},}
What is the best way to convert an animal from Animal[any] to Animal[CatParams] ?
I have tried
cat, ok := any(animals[1]).(Cat)
and it's not ok.
Thanks in advance!
答案1
得分: 0
根据@Volker和@Pak Uula的评论，你可以将它们放入一个interface{}切片中，但这并不是运行时动态类型。Cat仍然是Cat：
var animals = []interface{}{Dog{Name: "biggie doggie",Type: "dog",Params: DogParams{TailLength: 5},},Cat{Name: "persia",Type: "cat",Params: CatParams{MeowVolume: 2},},}
英文:
Following the comments from @Volker and @Pak Uula, you can stick them in an interface{} slice, but this isn't run-time dynamic typing. A Cat is still a Cat:
var animals = []interface{}{Dog{Name: "biggie doggie",Type: "dog",Params: DogParams{TailLength: 5},},Cat{Name: "persia",Type: "cat",Params: CatParams{MeowVolume: 2},},}
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