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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2002-2006, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala
/** The <code>Predef</code> object provides definitions that are
* accessible in all Scala compilation units without explicit
* qualification.
*/
object Predef {
// classOf dummy -------------------------------------------------
/** Return the runtime representation of a class type. */
def classOf[T]: Class = null
// aliases -------------------------------------------------------
type byte = scala.Byte
type short = scala.Short
type char = scala.Char
type int = scala.Int
type long = scala.Long
type float = scala.Float
type double = scala.Double
type boolean = scala.Boolean
type unit = scala.Unit
type All = Nothing
type AllRef = Null
type String = java.lang.String
type StringBuilder = compat.StringBuilder
type Class = java.lang.Class
type Throwable = java.lang.Throwable
type Exception = java.lang.Exception
type Error = java.lang.Error
type RuntimeException = java.lang.RuntimeException
type NullPointerException = java.lang.NullPointerException
type ClassCastException = java.lang.ClassCastException
type IndexOutOfBoundsException = java.lang.IndexOutOfBoundsException
type ArrayIndexOutOfBoundsException = java.lang.ArrayIndexOutOfBoundsException
type UnsupportedOperationException = java.lang.UnsupportedOperationException
type IllegalArgumentException = java.lang.IllegalArgumentException
type NoSuchElementException = java.util.NoSuchElementException
type NumberFormatException = java.lang.NumberFormatException
// --- Miscelleaneous -----------------------------------------------
val $scope = scala.xml.TopScope
type Function[-a,+b] = Function1[a,b]
type Map[a, b] = collection.immutable.Map[a, b]
type Set[a] = collection.immutable.Set[a]
val Map = collection.immutable.Map
val Set = collection.immutable.Set
// errors and asserts -------------------------------------------------
def error(message: String): Nothing = throw new Error(message)
def exit: Nothing = exit(0)
def exit(status: Int): Nothing = {
java.lang.System.exit(status)
throw new Throwable()
}
def assert(assertion: Boolean): Unit = {
if (!assertion)
throw new java.lang.AssertionError("assertion failed")
}
def assert(assertion: Boolean, message: Any): Unit = {
if (!assertion)
throw new java.lang.AssertionError("assertion failed: " + message)
}
def assume(assumption: Boolean): Unit = {
if (!assumption)
throw new Error("assumption failed")
}
def assume(assumption: Boolean, message: Any): Unit = {
if (!assumption)
throw new Error("assumption failed: " + message)
}
// --- Tupling ----------------------------------------------
type Pair[+a, +b] = Tuple2[a, b]
def Pair[a, b](x: a, y: b) = Tuple2(x, y)
type Triple[+a, +b, +c] = Tuple3[a, b, c]
def Triple[a, b, c](x: a, y: b, z: c) = Tuple3(x, y, z)
class ArrowAssoc[a](x: a) {
def -> [b](y: b): Tuple2[a, b] = Tuple2(x, y)
}
implicit def any2ArrowAssoc[a](x: a): ArrowAssoc[a] = new ArrowAssoc(x)
def Tuple[a1](x1: a1) = Tuple1(x1)
def Tuple[a1, a2](x1: a1, x2: a2) = Tuple2(x1, x2)
def Tuple[a1, a2, a3](x1: a1, x2: a2, x3: a3) = Tuple3(x1, x2, x3)
def Tuple[a1, a2, a3, a4](x1: a1, x2: a2, x3: a3, x4: a4) = Tuple4(x1, x2, x3, x4)
def Tuple[a1, a2, a3, a4, a5](x1: a1, x2: a2, x3: a3, x4: a4, x5: a5) = Tuple5(x1, x2, x3, x4, x5)
def Tuple[a1, a2, a3, a4, a5, a6](x1: a1, x2: a2, x3: a3, x4: a4, x5: a5, x6: a6) = Tuple6(x1, x2, x3, x4, x5, x6)
def Tuple[a1, a2, a3, a4, a5, a6, a7](x1: a1, x2: a2, x3: a3, x4: a4, x5: a5, x6: a6, x7: a7) = Tuple7(x1, x2, x3, x4, x5, x6, x7)
def Tuple[a1, a2, a3, a4, a5, a6, a7, a8](x1: a1, x2: a2, x3: a3, x4: a4, x5: a5, x6: a6, x7: a7, x8: a8) = Tuple8(x1, x2, x3, x4, x5, x6, x7, x8)
def Tuple[a1, a2, a3, a4, a5, a6, a7, a8, a9](x1: a1, x2: a2, x3: a3, x4: a4, x5: a5, x6: a6, x7: a7, x8: a8, x9: a9) = Tuple9(x1, x2, x3, x4, x5, x6, x7, x8, x9)
// views -------------------------------------------------------------
implicit def identity[a](x: a): a = x
implicit def byteWrapper(x: byte) = new runtime.RichByte(x)
implicit def shortWrapper(x: short) = new runtime.RichShort(x)
implicit def intWrapper(x: int) = new runtime.RichInt(x)
implicit def charWrapper(c: char) = new runtime.RichChar(c)
implicit def longWrapper(x: long) = new runtime.RichLong(x)
implicit def floatWrapper(x: float) = new runtime.RichFloat(x)
implicit def doubleWrapper(x: double) = new runtime.RichDouble(x)
implicit def booleanWrapper(x: boolean) = new runtime.RichBoolean(x)
implicit def stringWrapper(x: String) = new runtime.RichString(x)
implicit def any2stringadd(x: Any) = new runtime.StringAdd(x)
implicit def exceptionWrapper(exc: Throwable) = new runtime.RichException(exc)
implicit def unit2ordered(x: unit): Ordered[unit] = new Ordered[unit] with Proxy {
def self: Any = x
def compare (y: unit): int = 0
}
implicit def iterable2ordered[a <% Ordered[a]](xs: Iterable[a]): Ordered[Iterable[a]] =
new Ordered[Iterable[a]] with Proxy {
val self = xs
def compare (that: Iterable[a]) = {
var res = 0
val these = xs.elements
val those = that.elements
while (res == 0 && these.hasNext)
res = if (those.hasNext) these.next compare those.next else 1
res
}
}
implicit def tuple22ordered[a1 <% Ordered[a1], a2 <% Ordered[a2]](x: Tuple2[a1, a2]): Ordered[Tuple2[a1, a2]] =
new Ordered[Tuple2[a1, a2]] with Proxy {
val self = x
def compare (y: Tuple2[a1, a2]): Int = {
val res = x._1 compare y._1
if (res == 0) x._2 compare y._2
else res
}
}
implicit def tuple32ordered[a1 <% Ordered[a1], a2 <% Ordered[a2], a3 <% Ordered[a3]](x: Tuple3[a1, a2, a3]): Ordered[Tuple3[a1, a2, a3]] =
new Ordered[Tuple3[a1, a2, a3]] with Proxy {
val self = x
def compare (y: Tuple3[a1, a2, a3]): Int = {
val res = x._1 compare y._1
if (res == 0) Tuple2(x._2, x._3) compare Tuple2(y._2, y._3)
else res
}
}
implicit def tuple42ordered[a1 <% Ordered[a1], a2 <% Ordered[a2], a3 <% Ordered[a3], a4 <% Ordered[a4]](x: Tuple4[a1, a2, a3, a4]): Ordered[Tuple4[a1, a2, a3, a4]] =
new Ordered[Tuple4[a1, a2, a3, a4]] with Proxy {
val self = x
def compare (y: Tuple4[a1, a2, a3, a4]): Int = {
val res = x._1 compare y._1
if (res == 0) Tuple3(x._2, x._3, x._4) compare Tuple3(y._2, y._3, y._4)
else res
}
}
implicit def tuple52ordered[a1 <% Ordered[a1], a2 <% Ordered[a2], a3 <% Ordered[a3], a4 <% Ordered[a4], a5 <% Ordered[a5]](x: Tuple5[a1, a2, a3, a4, a5]): Ordered[Tuple5[a1, a2, a3, a4, a5]] =
new Ordered[Tuple5[a1, a2, a3, a4, a5]] with Proxy {
val self = x
def compare (y: Tuple5[a1, a2, a3, a4, a5]): Int = {
val res = x._1 compare y._1
if (res == 0) Tuple4(x._2, x._3, x._4, x._5) compare Tuple4(y._2, y._3, y._4, y._5)
else res
}
}
implicit def tuple62ordered[a1 <% Ordered[a1], a2 <% Ordered[a2], a3 <% Ordered[a3], a4 <% Ordered[a4], a5 <% Ordered[a5], a6 <% Ordered[a6]](x: Tuple6[a1, a2, a3, a4, a5, a6]): Ordered[Tuple6[a1, a2, a3, a4, a5, a6]] =
new Ordered[Tuple6[a1, a2, a3, a4, a5, a6]] with Proxy {
val self = x
def compare (y: Tuple6[a1, a2, a3, a4, a5, a6]): Int = {
val res = x._1 compare y._1
if (res == 0) Tuple5(x._2, x._3, x._4, x._5, x._6) compare Tuple5(y._2, y._3, y._4, y._5, y._6)
else res
}
}
implicit def tuple72ordered[a1 <% Ordered[a1], a2 <% Ordered[a2], a3 <% Ordered[a3], a4 <% Ordered[a4], a5 <% Ordered[a5], a6 <% Ordered[a6], a7 <% Ordered[a7]](x: Tuple7[a1, a2, a3, a4, a5, a6, a7]): Ordered[Tuple7[a1, a2, a3, a4, a5, a6, a7]] =
new Ordered[Tuple7[a1, a2, a3, a4, a5, a6, a7]] with Proxy {
val self = x
def compare (y: Tuple7[a1, a2, a3, a4, a5, a6, a7]): Int = {
val res = x._1 compare y._1
if (res == 0) Tuple6(x._2, x._3, x._4, x._5, x._6, x._7) compare Tuple6(y._2, y._3, y._4, y._5, y._6, y._7)
else res
}
}
implicit def tuple82ordered[a1 <% Ordered[a1], a2 <% Ordered[a2], a3 <% Ordered[a3], a4 <% Ordered[a4], a5 <% Ordered[a5], a6 <% Ordered[a6], a7 <% Ordered[a7], a8 <% Ordered[a8]](x: Tuple8[a1, a2, a3, a4, a5, a6, a7, a8]): Ordered[Tuple8[a1, a2, a3, a4, a5, a6, a7, a8]] =
new Ordered[Tuple8[a1, a2, a3, a4, a5, a6, a7, a8]] with Proxy {
val self = x
def compare (y: Tuple8[a1, a2, a3, a4, a5, a6, a7, a8]): Int = {
val res = x._1 compare y._1
if (res == 0) Tuple7(x._2, x._3, x._4, x._5, x._6, x._7, x._8) compare Tuple7(y._2, y._3, y._4, y._5, y._6, y._7, y._8)
else res
}
}
implicit def tuple92ordered[a1 <% Ordered[a1], a2 <% Ordered[a2], a3 <% Ordered[a3], a4 <% Ordered[a4], a5 <% Ordered[a5], a6 <% Ordered[a6], a7 <% Ordered[a7], a8 <% Ordered[a8], a9 <% Ordered[a9]](x: Tuple9[a1, a2, a3, a4, a5, a6, a7, a8, a9]): Ordered[Tuple9[a1, a2, a3, a4, a5, a6, a7, a8, a9]] =
new Ordered[Tuple9[a1, a2, a3, a4, a5, a6, a7, a8, a9]] with Proxy {
val self = x
def compare (y: Tuple9[a1, a2, a3, a4, a5, a6, a7, a8, a9]): Int = {
val res = x._1 compare y._1
if (res == 0) Tuple8(x._2, x._3, x._4, x._5, x._6, x._7, x._8, x._9) compare Tuple8(y._2, y._3, y._4, y._5, y._6, y._7, y._8, y._9)
else res
}
}
implicit def byte2short(x: byte): short = x.toShort
implicit def byte2int(x: byte): int = x.toInt
implicit def byte2long(x: byte): long = x.toLong
implicit def byte2float(x: byte): float = x.toFloat
implicit def byte2double(x: byte): double = x.toDouble
implicit def short2int(x: short): int = x.toInt
implicit def short2long(x: short): long = x.toLong
implicit def short2float(x: short): float = x.toFloat
implicit def short2double(x: short): double = x.toDouble
implicit def char2int(x: char): int = x.toInt
implicit def char2long(x: char): long = x.toLong
implicit def char2float(x: char): float = x.toFloat
implicit def char2double(x: char): double = x.toDouble
implicit def int2long(x: int): long = x.toLong
implicit def int2float(x: int): float = x.toFloat
implicit def int2double(x: int): double = x.toDouble
implicit def long2float(x: long): float = x.toFloat
implicit def long2double(x: long): double = x.toDouble
implicit def float2double(x: float): double = x.toDouble
implicit def byte2Byte(x: byte) = new java.lang.Byte(x)
implicit def short2Short(x: short) = new java.lang.Short(x)
implicit def char2Character(x: char) = new java.lang.Character(x)
implicit def int2Integer(x: int) = new java.lang.Integer(x)
implicit def long2Long(x: long) = new java.lang.Long(x)
implicit def float2Float(x: float) = new java.lang.Float(x)
implicit def double2Double(x: double) = new java.lang.Double(x)
implicit def boolean2Boolean(x: boolean) = new java.lang.Boolean(x)
def currentThread = java.lang.Thread.currentThread()
}
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