| // +build OMIT | |
| package main | |
| import "fmt" | |
| func do(i interface{}) { | |
| switch v := i.(type) { | |
| case int: | |
| fmt.Printf("Twice %v is %v\n", v, v*2) | |
| case string: | |
| fmt.Printf("%q is %v bytes long\n", v, len(v)) | |
| default: | |
| fmt.Printf("I don't know about type %T!\n", v) | |
| } | |
| } | |
| func main() { | |
| do(21) | |
| do("hello") | |
| do(true) | |
| } |