On Fri, Jan 16, 2009 at 3:17 AM, Tom Hawtin <tackl...@tackline.plus.com> wrote: > > On Jan 14, 3:28 pm, Reinier Zwitserloot <reini...@gmail.com> wrote: > >> com.package.ContainingClass.foobar(Ljava/util/List;V) >> com.package.ContainingClass.foobar(Ljava/util/List;I) >> >> which is not okay - being only different in return type is not >> allowed. This isn't a big concern and is not generally covered by what >> is meant with 'we should reify generics', but its important to know >> that this can pretty much never be fixed without serious overhauling >> of the JVM. > > Adding generic type information to method calls and using that > together with the generic type information already present on methods > in the class file doesn't seem a great stretch to me. The question is > what sort of bangs-per-buck are you getting. The bucks are small, bit > the bangs are barely a fizzle, IMO. But I think thats a general > problem with reification.
You could make the same point for any overloading. If you can distinguish between singleParameterMethod(A param); and singleParameterMethod(B param); why not distinguish listParameterMethod(List<A> param); and listParameterMethod(List<B> param); ? The conceptual difference seems very similar. Even more extreme if you include arrays -- but I'd rather ignore those. >> what can actually be recovered by the JVM at runtime is this: >> >> List<String> foo = new ArrayList(); > > It gets more paradoxical with the like of Collections.emptySet The problem exists only if you look at a mutable version, otherwise the empty set can be seen as being of any type. Once you require mutability it is only fair to request the specification of a type parameter. Peter --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "The Java Posse" group. To post to this group, send email to javaposse@googlegroups.com To unsubscribe from this group, send email to javaposse+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/javaposse?hl=en -~----------~----~----~----~------~----~------~--~---
