I wrote: > The issue seems to be that code like this: > ... > is far too cute for its own good.
Oh, there's another thing here that qualifies as too-cute: loops like for (IOObject io_object = IOOBJECT_FIRST; io_object < IOOBJECT_NUM_TYPES; io_object++) make it look like we could define these enums as 1-based rather than 0-based, but if we did this code would fail, because it's confusing "the number of values" with "1 more than the last value". Again, we could fix that with tests like "io_context <= IOCONTEXT_LAST", but I don't see the point of adding more macros rather than removing some. We do need IOOBJECT_NUM_TYPES to declare array sizes with, so I think we should nuke the "xxx_FIRST" macros as being not worth the electrons they're written on, and write these loops like for (int io_object = 0; io_object < IOOBJECT_NUM_TYPES; io_object++) which is not actually adding any assumptions that you don't already make by using io_object as a C array subscript. regards, tom lane