33 lines
710 B
Go
33 lines
710 B
Go
// generics/dogsandrobots.go
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// (c)2020 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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package main
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import "fmt"
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type Dog struct {}
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func (this Dog) speak() { fmt.Printf("Arf!\n")}
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func (this Dog) sit() { fmt.Printf("Sitting\n")}
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func (this Dog) reproduce() {}
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type Robot struct {}
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func (this Robot) speak() { fmt.Printf("Click!\n") }
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func (this Robot) sit() { fmt.Printf("Clank!\n") }
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func (this Robot) oilChange() {}
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func perform(speaker interface { speak(); sit() }) {
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speaker.speak();
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speaker.sit();
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}
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func main() {
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perform(Dog{})
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perform(Robot{})
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}
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/* Output:
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Arf!
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Sitting
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Click!
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Clank!
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*/
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