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
