15 lines
710 B
Scala
15 lines
710 B
Scala
import Math.{addExact => ++, multiplyExact => **, negateExact => ~~, subtractExact => --}
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def requireOverflow(f: => Unit) =
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try {f; println("Undetected overflow")} catch{case e: Exception => /* caught */}
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println("Testing overflow detection for 32-bit unsigned integers")
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requireOverflow(~~(--(~~(2147483647), 1))) // -(-2147483647-1)
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requireOverflow(++(2000000000, 2000000000)) // 2000000000 + 2000000000
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requireOverflow(--(~~(2147483647), 2147483647)) // -2147483647 + 2147483647
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requireOverflow(**(46341, 46341)) // 46341 * 46341
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requireOverflow(**(--(~~(2147483647),1), -1)) // same as (-2147483647-1) / -1
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println("Test - Expect Undetected overflow:")
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requireOverflow(++(1,1)) // Undetected overflow
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