Yup! Exactly that, but they're supported at the language level and every variable is, by default, not optional.
So if I write var foo: Int = 0, I can be sure that foo will never be nil, because if I write code that even places foo at risk of being nil, my program won't compile! Pretty awesome stuff.
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Yup! Exactly that, but they're supported at the language level and every variable is, by default, not optional.
So if I write
var foo: Int = 0, I can be sure thatfoowill never be nil, because if I write code that even placesfooat risk of being nil, my program won't compile! Pretty awesome stuff.