Error CS0122 : Helper (inner) Class Constructor not available unless assigned public

[sushihangover]

Error CS0122: `aslibraryinternalclass.__MyClass_as.Helper.Helper()' is inaccessible due to its protection level (CS0122) (as-library-internalclass)

package aslibraryinternalclass
{
    public class MyClass
    {
        function MyClass() {
            var base:Helper = new Helper();
        }
    }
}

class Helper {
    function Helper() {
    }
}

[sushihangover]

This a carryover of C# and how these inner classes are constructed.

AS3:

Constructor methods can only be public, but the use of the public attribute is optional. You cannot use any of the other access control specifiers, including private, protected, or internal, on a constructor. You also cannot use a user-defined namespace with a constructor method.

Workaround : Manually assign the methods (functions) of the helper/inner class to be public:

package aslibraryinternalclass
{
    public class MyClass
    {
        function MyClass() {
            var base:Helper = new Helper();
        }
    }
}

class Helper {
    public function Helper() {
    }
}