On 13 October 2015 at 16:19, Solerman Kaplon <soler...@gmail.com> wrote: > Em 13-10-2015 11:35, Nils Chr. Brause escreveu: >> >> In C++ the order doesn't matter either, since each entry has a defined >> value. I wonder why this is different in Java? > > > Java Enums doesn't have "value". It just a class instance. But since it's a > class one can add regular fields to it, like this (writing of the top of my > head): > > public static enum Orientation { > Portrait(1), Landscape(2); > > final int value; > > Orientation(int value) { > this.value = value; > } > > public int getValue() { > return this.value; > } > } > > Solerman
I really don't understand this discussion. Is the claim that the usage of enums in java is problematic, because inserting a new value in an existing enum might change the index of later values, thereby creating an inconsistency? If so, all I can say that clearly the object you want to associate with wayland-style enums is not whatever Java has invented for an "enum". The values that are associated to names inside wayland enums are very clear-defined, and if a language cannot safely couple names back to values, then that is a language that does not understand the concept of a variable. If this is a fundamental problem about Java enums, you better find a way around it, but I don't see how this is in any way a problem on the wayland side: there are enums, and enums contain names, and those names have values. But if this is indeed the issue you are discussing, then this must have already been a problem before the introduction of additional XML attributes. Can we agree on the following? Until there is any firm specification of open/closed enums, every enum should be considered open, and although some legal values might be listed, others might not be, and some might only be legal sometimes. New values may be added (but not changed or removed) to protocol specifications without introducing any compatibility issues. _______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/wayland-devel