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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2002-2007, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
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 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 Runnable = java.lang.Runnable
type Throwable = java.lang.Throwable
type Exception = java.lang.Exception
type Error = java.lang.Error
type AssertionError = 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 = RuntimeException //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) {
if (!assertion)
throw new AssertionError("assertion failed")
}
def assert(assertion: Boolean, message: Any) {
if (!assertion)
throw new AssertionError("assertion failed: " + message)
}
def assume(assumption: Boolean) {
if (!assumption)
throw new Error("assumption failed")
}
def assume(assumption: Boolean, message: Any) {
if (!assumption)
throw new Error("assumption failed: " + message)
}
// tupling ------------------------------------------------------------
type Pair[+A, +B] = Tuple2[A, B]
object Pair {
def apply[A, B](x: A, y: B) = Tuple2(x, y)
def unapply[A, B](x: Tuple2[A, B]): Option[Tuple2[A, B]] = Some(x)
}
type Triple[+A, +B, +C] = Tuple3[A, B, C]
object Triple {
def apply[A, B, C](x: A, y: B, z: C) = Tuple3(x, y, z)
def unapply[A, B, C](x: Tuple3[A, B, C]): Option[Tuple3[A, B, C]] = Some(x)
}
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)
// printing and reading -----------------------------------------------
def print(x: Any) = Console.print(x)
def println() = Console.println()
def println(x: Any) = Console.println(x)
// 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 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]): Int = {
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 short2int(x: Short): Int = x.toInt
implicit def short2long(x: Short): Long = x.toLong
implicit def char2int(x: Char): Int = x.toInt
implicit def char2long(x: Char): Long = x.toLong
implicit def int2long(x: Int): Long = x.toLong
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 boolean2Boolean(x: Boolean) = new java.lang.Boolean(x)
def currentThread = java.lang.Thread.currentThread()
}
|
