On 4/19/21 2:01 PM, Remi Forax wrote:
----- Mail original ----- Thinking a little bit about your proposal, introducing an interface right in the middle of a hierarchy is not a backward compatible change (you have an issue when the compiler has to use the lowest upper bound). By example void m(List<Collection<String>> list) { ... } var list = List.of(new LinkedHashSet<String>(), List.of("foo")); m(list); // does not compile anymore currently the type of list is List<Collection<String>> but with your proposal, the type will be List<ReversibleCollection<String>>
Yes, interesting. Not too difficult to fix though. Either change the method declaration to
void m(List<? extends Collection<String>> list) or change the 'var' to an explicit declaration of List<Collection<String>>. s'marks