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authorJoey Hess <joey@gnu.kitenet.net>2009-10-13 14:37:14 -0400
committerJoey Hess <joey@gnu.kitenet.net>2009-10-13 14:37:14 -0400
commita20bc7a3fc6a2f2369022873ef7c2afbd5e49105 (patch)
treeb885c1392e469a16f40a228345558e4ff3a97623 /doc/bugs/relative_date_weird_results.mdwn
parent5e4e43e2c73d6077f8091fe063add1ebce9335e3 (diff)
influence blocker implementation
This avoids unnecessary influences being recorded from pagespecs such as "link(done) and bugs/*", when a page cannot ever possibly match. A pagespec term that returns a value without influence is an influence blocker. If such a blocker has a false value (possibly due to being negated) and is ANDed with another term, it blocks that term's influence from propigating out. If the term is ORed, or has a true value, it does not block influence. (Consider "link(done) or bugs/*" and "link(done) and !nosuchpage") In the implementation in merge_influence, I had to be careful to never negate $this or $other when testing if they are an influence blocker, since negation mutates the object. Thus the slightly weird if statement.
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