英文:
Go struct type on an already typed struct
问题
我有一个名为Service的结构体，在xyz包中，多个API包装器（Api1，Api2）将使用它作为基础。我希望使用该包的人可以像这样调用每个API的方法：xyz.Api1.MethodA(..)和xyz.Api2.MethodB(..)。
目前我正在做这样的事情：
type api1 struct {
*Service
}
var Api1 *api1
func init() {
Api1 = &api1{
&Service{
...
}
}
}
func (a *api1) MethodA {
...
}
我不喜欢这种方式，因为它看起来有很多样板代码。我宁愿让Api1成为一个Service结构体，但是每个服务都会有不同的方法，所以我认为这是不可能的，除非我可以这样做：type Service api1 {...}？
有没有其他方法可以让用户以xyz.Api1.MethodA(..)这样的方式调用所需的方法，而不必为每个API创建一个新的结构体类型，并且不必有那么多样板代码？
英文:
I have a struct called Service in package xyz which multiple api wrappers (Api1, Api2) will use as a base. I want someone who is using the package to call the methods for each API like: xyz.Api1.MethodA(..) and xyz.Api2.MethodB(..)
Right now I'm doing something like this
type struct api1 {
*Service
}
var Api1 *api1
func init() {
Api1 = &api1{
&Service{
...
}
}
}
func (a *api1) MethodA {
...
}
I'm not a fan of this because it seems like a lot of boilerplate. I would rather have Api1 be a Service struct but each service will have different methods so I don't think that's possible unless I could do type Service api1 {...}?
Is there another way to get the desired call by a user to be something like xyz.Api1.MethodA(..) without having to create a new struct type for each api and without having so much boilerplate?
答案1
得分: 2
不使用全局变量，你可以创建两个新的类型，让用户决定如何使用它们：
type API1Service struct {
*Service
api1Param1 int
// 等等
}
func NewAPI1Service(api1Param1 int) *API1Service { /* ... */ }
// API1Service 的方法
type API2Service struct {
*Service
api2Param1 int
// 等等
}
func NewAPI2Service(api2Param1 int) *API2Service { /* ... */ }
// API2Service 的方法
然后，你的用户可以这样做：
api := xyz.NewAPI1Service(42)
api.MethodA()
// 等等
英文:
Instead of using global variables you can just create two new types and let users decide how to use them:
type API1Service struct {
*Service
api1Param1 int
// etc.
}
func NewAPI1Service(api1Param1 int) *API1Service { /* ... */ }
// methods on API1Service
type API2Service struct {
*Service
api2Param1 int
// etc.
}
func NewAPI2Service(api2Param1 int) *API2Service { /* ... */ }
// methods on API2Service
Then, your users can do
api := xyz.NewAPI1Service(42)
api.MethodA()
// etc.
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