$hand * @return list */ public static function all(array $hand): array { if ($hand === []) { return []; } $byRank = []; foreach ($hand as $c) { $byRank[$c->rank][] = $c; } $ranks = \array_keys($byRank); \sort($ranks); $has = static fn (int $r) => isset($byRank[$r]); $cnt = static fn (int $r) => \count($byRank[$r] ?? []); $out = []; $seen = []; $push = static function (array $cards) use (&$out, &$seen): void { $combo = Combo::parse($cards); if ($combo === null) { return; } $key = $combo->type . ':' . $combo->rank . ':' . $combo->length; if (isset($seen[$key])) { return; } $seen[$key] = true; $out[] = $combo; }; // 单 / 对 / 三 foreach ($ranks as $r) { $push([$byRank[$r][0]]); if ($cnt($r) >= 2) { $push([$byRank[$r][0], $byRank[$r][1]]); } if ($cnt($r) >= 3) { $push([$byRank[$r][0], $byRank[$r][1], $byRank[$r][2]]); } } // 三带一 / 三带二 foreach ($ranks as $r) { if ($cnt($r) < 3) { continue; } $triple = [$byRank[$r][0], $byRank[$r][1], $byRank[$r][2]]; foreach ($ranks as $s) { if ($s === $r) { continue; } if ($cnt($s) >= 1) { $push(\array_merge($triple, [$byRank[$s][0]])); } if ($cnt($s) >= 2) { $push(\array_merge($triple, [$byRank[$s][0], $byRank[$s][1]])); } } } // 顺子 (5..12 连) for ($len = 5; $len <= 12; $len++) { for ($start = 3; $start + $len - 1 <= 14; $start++) { $ok = true; $cards = []; for ($k = 0; $k < $len; $k++) { $rr = $start + $k; if (!$has($rr)) { $ok = false; break; } $cards[] = $byRank[$rr][0]; } if ($ok) { $push($cards); } } } // 连对 (3..10 连) for ($len = 3; $len <= 10; $len++) { for ($start = 3; $start + $len - 1 <= 14; $start++) { $ok = true; $cards = []; for ($k = 0; $k < $len; $k++) { $rr = $start + $k; if ($cnt($rr) < 2) { $ok = false; break; } $cards[] = $byRank[$rr][0]; $cards[] = $byRank[$rr][1]; } if ($ok) { $push($cards); } } } // 飞机（纯三连，2..6 连） for ($len = 2; $len <= 6; $len++) { for ($start = 3; $start + $len - 1 <= 14; $start++) { $ok = true; $cards = []; for ($k = 0; $k < $len; $k++) { $rr = $start + $k; if ($cnt($rr) < 3) { $ok = false; break; } $cards[] = $byRank[$rr][0]; $cards[] = $byRank[$rr][1]; $cards[] = $byRank[$rr][2]; } if ($ok) { $push($cards); } } } // 炸弹 foreach ($ranks as $r) { if ($cnt($r) === 4) { $push($byRank[$r]); } } // 火箭 if ($has(Card::JOKER_SMALL) && $has(Card::JOKER_BIG)) { $push([$byRank[Card::JOKER_SMALL][0], $byRank[Card::JOKER_BIG][0]]); } return $out; } }