Lazy Optional Property Always nil?

Question

Is there a reason that the following code always prints out nil?

class Foo
{
    @lazy var bar: Int? = 5
}

println(Foo().bar)

I would think that when the bar property is accessed it would be initialized to 5.

Answer 1

Sweeping aside why you'd want to do this, the issue here is that you need to provide a lazy property an initializer it can use when it is first called. The correct way to author your above code is:

class Foo {
    lazy var bar = Int(5)
}

print(Foo().bar)