Source File: ex22a/main.go

package main
import "fmt"

type Animal struct {
    Name string
    Age int
    Species string
    Weight float64
}

type Fruit struct {
    Name string
    Taste string
    Smell string
}

func PrintName(thing any) {
    fruit, ok := thing.(Fruit)

    if ok {
        fmt.Println("Name", fruit)
    } else {
        fmt.Println("I can't print that")
    }
}

func main() {
    // this will work
    durian := Fruit{"Durian", "Heaven", "Dead bodies and onions."}
    PrintName(durian)

    // this will fail
    joey := Animal{"Joey", 3, "Kangaroo", 100.0}
    PrintName(joey)
}