英文:
Create a generic channel
问题
我有一个定义了Subscribers映射通道的结构体。
package ws
type SessionHandler struct {
Subscribers map[chan interface{}]bool
}
我想要使其能够使用任何类型的通道进行实例化，就像这样：
type WsSession struct {
handler *ws.SessionHandler
}
handler := &ws.SessionHandler{
Subscribers: make(map[chan WsResponse]bool),
}
我提供的代码示例无法工作（cannot use make(map[chan WsResponse]bool) (value of type map[chan WsResponse]bool) as map[chan interface{}]bool value in struct literal），但是我该如何更新它以适应我的需求呢？
英文:
I have my struct defining a Subscribers that map channels.
package ws
type SessionHandler struct {
Subscribers map[chan interface{}]bool
}
I wanna make it possible to instantiate it with any kind of channel, like this:
type WsSession struct {
handler *ws.SessionHandler
}
handler := &ws.SessionHandler{
Subscribers: make(map[chan WsResponse]bool),
}
The code example I provided doesn't work (cannot use make(map[chan WsResponse]bool) (value of type map[chan WsResponse]bool) as map[chan interface{}]bool value in struct literal), but how could I update it to my purposes?
答案1
得分: 0
我试图实现的目标将在Go v1.18中成为可能，正如@torek在我的问题中所评论的。
目前，我所做的是这样的：
handler := &ws.SessionHandler{
Subscribers: make(map[chan json.RawMessage]bool),
}
我不再依赖于go结构体，并在我的通道中传递json.RawMessage。这不是完全干净的，因为我需要对我的消息进行编组/解组以进行适当的处理，但它是“通用的”，我可以实现我想要的功能。
英文:
What I was trying to accomplish will be possible in Go v1.18, as commented by @torek in my question.
For now, what I ended doing was this:
handler := &ws.SessionHandler{
Subscribers: make(map[chan json.RawMessage]bool),
}
I stopped relying on a go struct and communicated json.RawMessage in my channels. It's not totally clean because I need to marshal/unmarshal my message to give the proper treatment, but its "generic" and I could accomplish what I was trying to do.
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