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v/vlib/compiler/tests/interface_test.v

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struct Dog {
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breed string
}
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struct Cat {
breed string
}
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fn (d Cat) name() string { return 'Cat' }
fn (d Cat) speak() { println('meow') }
fn (d Dog) speak() { println('woof') }
fn (d Dog) name() string { return 'Dog'}
interface Speaker {
name() string
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speak()
}
interface Speak2er {
name() string
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speak()
}
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struct Foo {
speaker Speaker
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speakers []Speaker
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}
fn perform_speak(s Speaker) {
s.speak()
assert true
name := s.name()
assert name == 'Dog' || name == 'Cat'
}
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fn perform_speakers(speakers []Speaker) {
}
fn test_perform_speak() {
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dog := Dog{}
perform_speak(dog)
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cat := Cat{}
perform_speak(cat)
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//perform_speakers([dog, cat])
/*
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f := Foo {
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speaker: dog
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}
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*/
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}