如果我在Schala有以下班子:
class Simple {
def doit(a: String): Int = 42
}
以及这一类的事例
o = new Simple()
是否有可能界定一种将这种情形和一种在编纂成像这样的图象时知道的方法的暗中转换?
Tuple2 (o, (_: Simple).doit _)
我希望我能够本着以下精神来登记职能呼吁:
doThisLater (o -> doit)
我在职能上拥有根据对的复方功能,但添加这一厚度的合成糖是巨大的。
你们只能把这种方法推到别处。 Sample REPL session,
scala> case class Deferred[T, R](f : T => R)
defined class Deferred
scala> def doThisLater[T, R](f : T => R) = Deferred(f)
doThisLater: [T, R](f: T => R)Deferred[T,R]
scala> val deferred = doThisLater(o.doit _) // eta-convert doit
deferred: Deferred[String,Int] = Deferred(<function1>)
scala> deferred.f("foo")
res0: Int = 42
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