Hello everyone,
I have a problem with the attached test program.
It declares a class 'Base' and two other classes 'B' and 'C' which extend
'Base'.
On each class a method 'asC(): C' is implemented which returns an instance of
Class 'C'.
The class 'Base' contains a static cast operator which invokes 'asC()' on the
given object.
Afterwards instances of 'B' and 'C' are created in two different ways and the
objects are then cast to type 'C' by invoking the 'as C' operator and by
calling the 'asC()' method.
I would expect the program to behave the same in all occasions but it aborts
with a ClassCastException and produces the following output:
b: 15
b as C: 42
Uncaught exception at place 0: x10.lang.MultipleExceptions: null
c: 51
x10.lang.ClassCastException: null
c as C: 51
b2: 15
b2 as C: 42
c2: 51
c2 as C: 51
b3: 15
at x10::lang::Throwable::fillInStackTrace()
at x10aux::throwClassCastException()
at x10aux::ref<C>
x10aux::real_class_cast<C>(x10aux::ref<x10::lang::Reference>, bool)
at x10aux::ClassCastNotPrimitive<x10aux::ref<C>, x10aux::ref<Base>
>::_(x10aux::ref<Base>, bool)
at x10aux::ClassCastPrimitive<x10aux::ref<C>, x10aux::ref<Base>
>::_(x10aux::ref<Base>, bool)
at x10aux::ClassCast<x10aux::ref<C>, x10aux::ref<Base>
>::_(x10aux::ref<Base>, bool)
at x10aux::ref<C> x10aux::class_cast<x10aux::ref<C>, x10aux::ref<Base>
>(x10aux::ref<Base>)
at
Hello::main(x10aux::ref<x10::array::Array<x10aux::ref<x10::lang::String> > >)
at x10aux::BootStrapClosure::apply()
at x10_lang_Runtime__closure__2::apply()
at x10::lang::Activity::run()
at
x10::lang::Runtime__Worker::loop(x10aux::ref<x10::lang::SimpleLatch>, bool)
at x10::lang::Runtime__Worker::apply()
at x10::lang::Runtime__Pool::apply()
at x10::lang::Runtime::start(x10aux::ref<x10::lang::VoidFun_0_0>,
x10aux::ref<x10::lang::VoidFun_0_0>)
at int x10aux::template_main<x10::lang::Runtime, Hello>(int, char**)
at main
at start
Is this a bug in the compiler or in the runtime or is it expected behaviour?
I am using the C++ backend with X10DT 2.1.1 on OS X 10.6.6 (Intel).
Best regards,
Manfred
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