How to generate prime numbers with Cpre

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Cpre do given :x => 2..Float::INFINITY select do (1..x).select { |i| i != 1 && i != x }.all? { |i| x % i != 0 } end make { x } end.first(10)

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=> [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]

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Next steps. Make it work like this:

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Cpre { given :x, 2..Float::INFINITY given :y { |x| 1..x } select { |x, y| x % y == 0 } group_by :x select { |x, group| group.length == 2 } collect { |x| x } }.first(10)