I can't understand the following behaviour in Go:
package main
import "fmt"
type Something string
func (a *Something) String() string {
return "Bye"
}
func main() {
a := Something("Hello")
fmt.Printf("%s\n", a)
fmt.Printf("%s\n", a.String())
}
Will output:
Hello
Bye
Somehow this feels kinda incosistent. Is this expected behaviour? Can someone help me out here?
Your String() is defined on the pointer but you're passing a value to Printf.
Either change it to:
func (Something) String() string {
return "Bye"
}
or use
fmt.Printf("%s\n", &a)
The arguments types are different. For example,
package main
import "fmt"
type Something string
func (a *Something) String() string {
return "Bye"
}
func main() {
a := Something("Hello")
fmt.Printf("%T %s\n", a, a)
fmt.Printf("%T %s\n", a.String(), a.String())
}
Output:
main.Something Hello
string Bye
