Hi,
In the chapter of "Method set" from "Go in Action", there is a description
as below "This shows that it’s not always possible to get the address of a
value.", the question is in which case does compiler not able to get the
address of a value and why, thanks.
01 // Sample program to show how you can't always get the
02 // address of a value.
03 package main
04
05 import "fmt"
06
07 // duration is a type with a base type of int.
08 type duration int
09
10 // format pretty-prints the duration value.
11 func (d *duration) pretty() string {
12 return fmt.Sprintf("Duration: %d", *d)
13 }
14
15 // main is the entry point for the application.
16 func main() {
17 duration(42).pretty()
18
19 // ./listing46.go:17: cannot call pointer method on duration(42)
20 // ./listing46.go:17: cannot take the address of duration(42)
21 }
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