doucu7525
2019-06-05 20:34
浏览 72
已采纳

如何获取结构中嵌入式切片的内存地址?

How can I get the memory address of an embedded slice in a struct?

Example:

type t1 struct {
    data string
}

type t2 struct {
    listData []t1
}

Now I want to know the memory address of listData. I couldn't figure out how to get the memory address out of it using the following:

newData := t2{}
newData.listData = append(newData.listData, t1{data:"mydata"})
printf("%p", &newData.listData) // this doesn't work, in fact it returns address of newData
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1条回答 默认 最新

  • doulao1934 2019-06-05 20:38
    已采纳

    listData is the first field in the struct, its memory offset relative to the struct's address is zero, so they have the same address.

    type t2 struct {
    listData []string
    moreData []int
    }
    
    func main() {
        var foo t2
        fmt.Printf("%p %p %p", &foo, &foo.listData, &foo.moreData)
    }
    

    0x43e260 0x43e260 0x43e26c

    https://play.golang.org/p/FVMujcUHHYq

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