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doc: fix Interfaces example (#6499)

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Andrei Kurhan 2020-09-30 08:42:23 +03:00 committed by GitHub
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@ -1440,8 +1440,12 @@ particularly useful for initializing a C library.
### Interfaces ### Interfaces
```v ```v
struct Dog {} struct Dog {
struct Cat {} breed string
}
struct Cat {
}
fn (d Dog) speak() string { fn (d Dog) speak() string {
return 'woof' return 'woof'
@ -1465,8 +1469,9 @@ fn perform(s Speaker) string {
return s.speak() return s.speak()
} }
dog := Dog{} dog := Dog{'Leonberger'}
cat := Cat{} cat := Cat{}
println(perform(dog)) // "woof" println(perform(dog)) // "woof"
println(perform(cat)) // "meow" println(perform(cat)) // "meow"
``` ```