>>>>> On Mon, 29 May 2017, Michał Górny wrote: > On pon, 2017-05-29 at 20:00 +0200, Alexis Ballier wrote: >> Can you provide an efficient algorithm for the above syntax? That >> is, given a set of +/- useflags forced by user, output the set of >> effective useflags (or a rant if it is inconsistent).
> I'd rather leave that to people who are good with algorithms. I find > the whole thing scary but I don't really see a sane alternative here. > Worst case, we have to figure out some arbitrary limitations to keep > things sane. IMHO the sanest alternative would be to restrict the syntax to USE conditional forms which have an obvious solution. One of the many problems of REQUIRED_USE is that it sometimes requires solving a Zebra Puzzle. Also, can we find a better name? Sorry for the bikeshedding at this early stage, but I believe that ENFORCED_USE can be easily confused with use.force in profiles. MAPPED_USE? USE_MAP? Ulrich
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