通过匿名结构键进行地图查找(Map lookup via anonymous struct key)

通过匿名结构键进行地图查找(Map lookup via anonymous struct key)

我有以下map其键类型是匿名struct ：

var data map[struct{ pID, bID int }]string

问题： 如何构建实际获取/设置data值的密钥 ？

我试过这些，这些都会导致编译错误：

data[{1,2}] = "ok" data[{pID: 1, bID 2}] = "ok"

似乎我不能在没有类型名称的情况下形成复合文字，但是没有类型名称。

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这个相关问题使用任意struct作为map的值 ，但不使用密钥 ：

匿名结构作为地图的值

I have the following map whose key type is an anonymous struct:

var data map[struct{ pID, bID int }]string

Question: How would I go about constructing a key to actually get/set a value in data?

I've tried these, which all result in compiler errors:

data[{1,2}] = "ok" data[{pID: 1, bID 2}] = "ok"

It seems I cannot form a compound literal without having the type name, but there is no type name.

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This related question uses an anymous struct as the value of a map, but not the key:

Anonymous struct as value to a map

最满意答案

您也可以创建匿名密钥，如下所示：

func main() { data := map[struct{ pID, bID int }]string{} key := struct{pID, bID int}{1, 2} data[key] = "abc" data[struct{pID, bID int}{3, 4}] = "cha cha cha" fmt.Printf("%+v\n\n", data) fmt.Printf("'%s' '%s'\n", data[key], data[struct{pID, bID int}{3, 4}]) }

完整档案： https ： //play.golang.org/p/2q11qiwxuI

You can create anonymous keys as well, something like this:

func main() { data := map[struct{ pID, bID int }]string{} key := struct{pID, bID int}{1, 2} data[key] = "abc" data[struct{pID, bID int}{3, 4}] = "cha cha cha" fmt.Printf("%+v\n\n", data) fmt.Printf("'%s' '%s'\n", data[key], data[struct{pID, bID int}{3, 4}]) }

Full file: https://play.golang.org/p/2q11qiwxuI