package main
import (
"fmt"
)
func printTypeAndValue(iv interface{}) {
if v, ok := iv.(string); ok {
fmt.Printf("iv is of type string and has value '%s'\n", v)
return
}
if v, ok := iv.(int); ok {
fmt.Printf("iv is of type int and has value '%d'\n", v)
return
}
if v, ok := iv.(*int); ok {
fmt.Printf("iv is of type *int and has value '%s'\n", v)
return
}
}
func panicOnInvalidConversion() {
var iv interface{} = "string"
v := iv.(int)
fmt.Printf("v is int of value: %d\n", v)
}
func main() {
// pass a string
printTypeAndValue("string")
i := 5
// pass an int
printTypeAndValue(i)
// pass a pointer to int i.e. *int
printTypeAndValue(&i)
panicOnInvalidConversion()
}
