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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2002-2011, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// generated by genprod on Sat Oct 16 11:19:09 PDT 2010 (with fancy comment) (with extra methods)
package scala
/** Function with 1 parameter.
*
* In the following example the definition of
* succ is a shorthand for the anonymous class
* definition anonfun1:
*
* {{{
* object Main extends Application {
* val succ = (x: Int) => x + 1
*
* val anonfun1 = new Function1[Int, Int] {
* def apply(x: Int): Int = x + 1
* }
*
* println(succ(0))
* println(anonfun1(0))
* }
* }}}
*/
trait Function1[@specialized(scala.Int, scala.Long, scala.Float, scala.Double) -T1, @specialized(scala.Unit, scala.Boolean, scala.Int, scala.Float, scala.Long, scala.Double) +R] extends AnyRef { self =>
def apply(v1:T1): R
override def toString() = "<function1>"
/** (f compose g)(x) == f(g(x))
*/
def compose[A](g: A => T1): A => R = { x => apply(g(x)) }
/** (f andThen g)(x) == g(f(x))
*/
def andThen[A](g: R => A): T1 => A = { x => g(apply(x)) }
/** Turns a function A => Option[B] into a PartialFunction[A, B]. Important note:
* this transformation implies the original function will be called 2 or more
* times on each logical invocation, because the only way to supply an implementation
* of isDefinedAt is to call the function and examine the return value.
*
* @see PartialFunction#lift
* @return a partial function which is defined for those inputs
* where this function returns Some(_) and undefined where
* this function returns None.
*/
def unlift[R1](implicit ev: R <:< Option[R1]): PartialFunction[T1, R1] = new PartialFunction[T1, R1] {
def apply(x: T1): R1 = ev(Function1.this.apply(x)).get
def isDefinedAt(x: T1): Boolean = Function1.this.apply(x).isDefined
override def lift = Function1.this.asInstanceOf[T1 => Option[R1]]
}
}
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