英文:
Cannot convert nil to type x
问题
考虑以下示例：
lock.RLock()
var product *Product
if store[productId] != nil { //无法将nil转换为Product类型
product = &Product{}
*product = *store[productId] //store[productId]的间接引用无效（类型为Product）
}
lock.RUnlock()
每行的注释表示异常，我真的不明白我做错了什么。。
store 是一个 map[int]Product
有什么想法吗？
英文:
Consider the following example:
lock.RLock()
var product *Product
if store[productId] != nil { //cannot convert nil to type Product
product = &Product{}
*product = *store[productId] //invalid indirect of store[productId] (type Product)
}
lock.RUnlock()
The exceptions are as commented per line and i don't really get what i am doing wrong..
store is a map[int]Product
any ideas?
答案1
得分: 6
你正在将store用作已声明的方式：
store := make(map[int]*Product)
英文:
You are using store as if it were declared as:
store := make(map[int]*Product)
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