Weird Scala error related to implicit conversions by default constructor parameters

Question

Weird Scala error related to implicit conversions by default constructor parameters

Consider the bug.scala file:

package sandbox object Foo { implicit def stringToInt(s: String) = 5 } import Foo._ class Boo(val a: Int = "foo" / 3) { val b: Int = "foo" / 3 def c(d: Int = "foo" / 3) = d }

It defines an implicit conversion, imports it, and uses it in three different scenarios. Compile it:

 E:\prog\scala\test>scalac bug.scala bug.scala:9: error: value / is not a member of java.lang.String class Boo(val a: Int = "foo" / 3) { ^ one error found

Implicit conversion does not seem to work when using the default constructor parameter, but works for other scenarios.

Now see this:

 package sandbox object Foo { implicit def stringToInt(s: String) = 5 } object dummy import Foo._ import dummy._ class Boo(val a: Int = "foo" / 3) { val b: Int = "foo" / 3 def c(d: Int = "foo" / 3) = d }