Scala example source code file (fail10.scala)

This example Scala source code file (fail10.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

a, a, classcounts, classcounts, int, int

The Scala fail10.scala source code

class ClassCounts extends scala.collection.mutable.HashMap[Class[_], Int] { }

class A {  
  def f(xs: ClassCounts) {
    // ok
    xs(getClass) = xs(getClass) + 1
    // not ok
    xs(getClass) += 1
  }
}

// [Not checkable: parser]
// [Not checkable: namer]
// [Not checkable: packageobjects]
// [Now checking: typer]
// test/checker-tests/fail10.scala:8: error: 
// **** ERROR DURING INTERNAL CHECKING ****
// type mismatch;
//  found   : java.lang.Class[?0(in value ev$1)] where type ?0(in value ev$1)
//  required: java.lang.Class[?0(in method f)] where type ?0(in method f)
//     xs(getClass) += 1
//        ^
// one error found