
Scala example source code file (ScalaNumericConversions.scala)
The ScalaNumericConversions.scala Scala example source code/* __ *\ ** ________ ___ / / ___ Scala API ** ** / __/ __// _  / / / _  (c) 20072013, LAMP/EPFL ** ** __\ \/ /__/ __ / /__/ __  http://scalalang.org/ ** ** /____/\___/_/ _/____/_/   ** ** / ** \* */ package scala package math /** A slightly more specific conversion trait for classes which * extend ScalaNumber (which excludes value classes.) */ trait ScalaNumericConversions extends ScalaNumber with ScalaNumericAnyConversions { def underlying(): Object } /** Conversions which present a consistent conversion interface * across all the numeric types, suitable for use in value classes. */ trait ScalaNumericAnyConversions extends Any { /** @return `'''true'''` if this number has no decimal component, `'''false'''` otherwise. */ def isWhole(): Boolean def underlying(): Any def byteValue(): Byte def shortValue(): Short def intValue(): Int def longValue(): Long def floatValue(): Float def doubleValue(): Double /** Returns the value of this as a [[scala.Char]]. This may involve * rounding or truncation. */ def toChar = intValue().toChar /** Returns the value of this as a [[scala.Byte]]. This may involve * rounding or truncation. */ def toByte = byteValue() /** Returns the value of this as a [[scala.Short]]. This may involve * rounding or truncation. */ def toShort = shortValue() /** Returns the value of this as an [[scala.Int]]. This may involve * rounding or truncation. */ def toInt = intValue() /** Returns the value of this as a [[scala.Long]]. This may involve * rounding or truncation. */ def toLong = longValue() /** Returns the value of this as a [[scala.Float]]. This may involve * rounding or truncation. */ def toFloat = floatValue() /** Returns the value of this as a [[scala.Double]]. This may involve * rounding or truncation. */ def toDouble = doubleValue() /** Returns `true` iff this has a zero fractional part, and is within the * range of [[scala.Byte]] MinValue and MaxValue; otherwise returns `false`. */ def isValidByte = isWhole && (toInt == toByte) /** Returns `true` iff this has a zero fractional part, and is within the * range of [[scala.Short]] MinValue and MaxValue; otherwise returns `false`. */ def isValidShort = isWhole && (toInt == toShort) /** Returns `true` iff this has a zero fractional part, and is within the * range of [[scala.Int]] MinValue and MaxValue; otherwise returns `false`. */ def isValidInt = isWhole && (toLong == toInt) /** Returns `true` iff this has a zero fractional part, and is within the * range of [[scala.Char]] MinValue and MaxValue; otherwise returns `false`. */ def isValidChar = isWhole && (toInt >= Char.MinValue && toInt <= Char.MaxValue) protected def unifiedPrimitiveHashcode() = { val lv = toLong if (lv >= Int.MinValue && lv <= Int.MaxValue) lv.toInt else lv.## } /** Should only be called after all known nonprimitive * types have been excluded. This method won't dispatch * anywhere else after checking against the primitives * to avoid infinite recursion between equals and this on * unknown "Number" variants. * * Additionally, this should only be called if the numeric * type is happy to be converted to Long, Float, and Double. * If for instance a BigInt much larger than the Long range is * sent here, it will claim equality with whatever Long is left * in its lower 64 bits. Or a BigDecimal with more precision * than Double can hold: same thing. There's no way given the * interface available here to prevent this error. */ protected def unifiedPrimitiveEquals(x: Any) = x match { case x: Char => isValidChar && (toInt == x.toInt) case x: Byte => isValidByte && (toByte == x) case x: Short => isValidShort && (toShort == x) case x: Int => isValidInt && (toInt == x) case x: Long => toLong == x case x: Float => toFloat == x case x: Double => toDouble == x case _ => false } } Other Scala source code examplesHere is a short list of links related to this Scala ScalaNumericConversions.scala source code file: 
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