// +build OMIT package main import ( "fmt" "math" ) type I interface { M() } type T struct { S string } func (t *T) M() { fmt.Println(t.S) } type F float64 func (f F) M() { fmt.Println(f) } func main() { var i I i = &T{"Hello"} describe(i) i.M() i = F(math.Pi) describe(i) i.M() } func describe(i I) { fmt.Printf("(%v, %T)\n", i, i) }