在Scala中获取运行时类型的字符串表示形式

在Scala中,是否可以在运行时获取类型的字符串表示形式？我试图沿着这些方向做点什么:

def printTheNameOfThisType[T]() = {
  println(T.toString)
}

Julie.. 8

在Scala 2.10及更高版本中,使用TypeTag包含完整类型信息的内容.您需要包含scala-reflect库才能执行此操作:

import scala.reflect.runtime.universe._
def printTheNameOfThisType[T: TypeTag]() = {
  println(typeOf[T].toString)
}

您将获得如下结果:

scala> printTheNameOfThisType[Int]
Int

scala> printTheNameOfThisType[String]
String

scala> printTheNameOfThisType[List[Int]]
scala.List[Int]

svrist.. 6

注意:这个答案已经过时了!

请使用TypeTag for Scala 2.10及更高版本查看答案

我可以在freenode上推荐#Scala

10:48  http://stackoverflow.com/questions/190368/getting-the-string-representation-of-a-type-at-runtime-in-scala <-- isnt this posible?
10:48  possible
10:48  Title: Getting the string representation of a type at runtime in Scala - Stack Overflow,
                  http://tinyurl.com/53242l
10:49  Types aren't objects.
10:49  or values
10:49  println(classOf[T]) should give you something, but probably not what you want.

classOf的描述

在Scala 2.10及更高版本中,使用TypeTag包含完整类型信息的内容.您需要包含scala-reflect库才能执行此操作:

import scala.reflect.runtime.universe._
def printTheNameOfThisType[T: TypeTag]() = {
  println(typeOf[T].toString)
}

您将获得如下结果:

scala> printTheNameOfThisType[Int]
Int

scala> printTheNameOfThisType[String]
String

scala> printTheNameOfThisType[List[Int]]
scala.List[Int]

请使用TypeTag for Scala 2.10及更高版本查看答案

我可以在freenode上推荐#Scala

10:48  http://stackoverflow.com/questions/190368/getting-the-string-representation-of-a-type-at-runtime-in-scala <-- isnt this posible?
10:48  possible
10:48  Title: Getting the string representation of a type at runtime in Scala - Stack Overflow,
                  http://tinyurl.com/53242l
10:49  Types aren't objects.
10:49  or values
10:49  println(classOf[T]) should give you something, but probably not what you want.

classOf的描述

在Scala中有一个新的,大多数没有记录的功能,称为"清单"; 它的工作原理如下:

object Foo {
  def apply[T <: AnyRef](t: T)(implicit m: scala.reflect.Manifest[T]) = println("t was " + t.toString + " of class " + t.getClass.getName() + ", erased from " + m.erasure)
}

AnyRef绑定就是为了确保该值具有.toString方法.