public function watch2OnHighest(Decisions $decisions) { $literals = $this->rule->getLiterals(); if ($literals < 3) { return; } $watchLevel = 0; foreach ($literals as $literal) { $level = $decisions->decisionLevel($literal); if ($level > $watchLevel) { $this->watch2 = $literal; $watchLevel = $level; } } }
/** * Places the second watch on the rule's literal, decided at the highest level * * Useful for learned rules where the literal for the highest rule is most * likely to quickly lead to further decisions. * * @param Decisions $decisions The decisions made so far by the solver */ public function watch2OnHighest(Decisions $decisions) { $literals = $this->rule->getLiterals(); // if there are only 2 elements, both are being watched anyway if ($literals < 3) { return; } $watchLevel = 0; foreach ($literals as $literal) { $level = $decisions->decisionLevel($literal); if ($level > $watchLevel) { $this->watch2 = $literal; $watchLevel = $level; } } }