我有一个示例代码:
class A(str: String) {
println(s"InsideCase:::$str")
}
object A {
def apply(str: String) = {
println("foobar::")
new A(str)
}
}
object b extends App {
A("kool")
}
此代码在Intellij中正常工作。并给我输出:
foobar::
InsideCAse:::kool
但是,当尝试在REPL上执行此操作时:
scala> :paste
// Entering paste mode (ctrl-D to finish)
class A(str: String) {
println(s"InsideCAse:::$str")
}
object A {
def apply(str: String) = {
println("foobar::")
new A(str)
}
}
// Exiting paste mode, now interpreting.
defined class A
defined object A
scala> A("kool")
它给我以下错误:
<console>:27: error: reference to A is ambiguous;
it is imported twice in the same scope by
import $line31$read.A
and import INSTANCE.A
A("kool")
我在这里想念什么?如果可以的话,请详细说明这将有所帮助。
这是火花重新限制。您可以用物体包装器进行旧学校的方式:
object awrapper {
class A(str: String) {
println(s"InsideCAse:::$str")
}
object A {
def apply(str: String) = {
println("foobar::")
new A(str)
}
}
}
import awrapper._
或用paste -raw
(Scala 2.11 )定义软件包:
scala> :paste -raw
// Entering paste mode (ctrl-D to finish)
package apacakage
class A(str: String) {
println(s"InsideCAse:::$str")
}
object A {
def apply(str: String) = {
println("foobar::")
new A(str)
}
}
// Exiting paste mode, now interpreting.
scala> import apacakage._
import apacakage._
scala> A("kool")
foobar::
InsideCAse:::kool
res1: apacakage.A = apacakage.A@6e818345