如何在golang中打印字符串基础数组的地址

Question

I am a beginner in go language and have a problem with string:

string is defined as:

 type stringStruct struct{
      str unsafe.Pointer
      len int }

I use:

str := "abc"
fmt.Printf("%p
", &str)

to print the struct address and I want to know how to print the address of underlying array of string.

I am not good at English and don't know if I express enough clearly.

thank you very much for your help.

Answer 1

Use the unsafe package to convert the string to a reflect.StringHeader. The Data field of the header is the address of the backing array of bytes.

func stringAddr(s string) uintptr {
    return (*reflect.StringHeader)(unsafe.Pointer(&s)).Data
}

Use the function like this:

str := "abc"
fmt.Printf("%08x
", stringAddr(str))