vladfaust/crystal-sum.cr

Created May 3, 2019 17:43

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Sorbet is cool, but polished Crystal is better

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crystal-sum.cr

	class A
	def sum(a : Int, b : Int) : Int
	a + b
	end
	end

	A.new.sum("foo", 42) # Compilation-time error, `a` is not Int32

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