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struct Dog {
name string
age int
}
struct Cat {
name string
age int
}
interface Animal {
say(s string)
greet() int
}
fn (d Dog) say(s string) {
println('Dog $d.name: "$s"')
}
fn (c Cat) say(s string) {
println('Cat $c.name: "$s"')
}
fn (d Dog) greet() int {
d.say('Hello!')
return d.age
}
fn (c Cat) greet() int {
c.say('Hello!')
return c.age
}
fn use(a Animal) {
if a is Dog {
println('dog')
} else if a is Cat {
println('cat')
} else {
println('its a bug!')
}
}
fn main() {
use(Dog{'Doggo', 5})
use(Cat{'Nyancat', 6})
}
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