Build: Enable -Wimplicit-fallthrough on clang (#25056)

* Misc: Use [[fallthrough]] attribute instead of comment to mark intentional fallthroughs

Related: #25006

* Misc: Add some missing breaks (no-ops) to satisfy clang

Related: #25006
Closes #25055

* Build: Enable -Wimplicit-fallthrough on clang

Closes #25006

12 files changed, 14 insertions, 0 deletions

diff --git a/src/server/scripts/Battlefield/BattlefieldWG.cpp b/src/server/scripts/Battlefield/BattlefieldWG.cpp
index 94b8287504e..8b33c154eb3 100644
--- a/src/server/scripts/Battlefield/BattlefieldWG.cpp
+++ b/src/server/scripts/Battlefield/BattlefieldWG.cpp
@@ -774,6 +774,7 @@ void BattlefieldWG::DoCompleteOrIncrementAchievement(uint32 achievement, Player*
         case ACHIEVEMENTS_WIN_WG_100:
         {
             // player->UpdateAchievementCriteria();
+            break;
         }
         default:
         {
diff --git a/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockSpire/instance_blackrock_spire.cpp b/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockSpire/instance_blackrock_spire.cpp
index a7607e62c99..b3093e6572e 100644
--- a/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockSpire/instance_blackrock_spire.cpp
+++ b/src/server/scripts/EasternKingdoms/BlackrockMountain/BlackrockSpire/instance_blackrock_spire.cpp
@@ -306,6 +306,7 @@ public:
                     for (GuidList::const_iterator itr = _incarceratorList.begin(); itr != _incarceratorList.end(); ++itr)
                         if (Creature* creature = instance->GetCreature(*itr))
                             creature->Respawn();
+                    break;
                 default:
                     break;
             }
diff --git a/src/server/scripts/EasternKingdoms/MagistersTerrace/instance_magisters_terrace.cpp b/src/server/scripts/EasternKingdoms/MagistersTerrace/instance_magisters_terrace.cpp
index f799388f88e..a58a3f10c23 100644
--- a/src/server/scripts/EasternKingdoms/MagistersTerrace/instance_magisters_terrace.cpp
+++ b/src/server/scripts/EasternKingdoms/MagistersTerrace/instance_magisters_terrace.cpp
@@ -125,6 +125,7 @@ class instance_magisters_terrace : public InstanceMapScript
                     case NPC_SUNBLADE_BLOOD_KNIGHT:
                         if (creature->GetDistance(KaelthasTrashGroupDistanceComparisonPos) < 10.0f)
                             _kaelthasPreTrashGUIDs.insert(creature->GetGUID());
+                        break;
                     default:
                         break;
                 }
diff --git a/src/server/scripts/EasternKingdoms/ScarletMonastery/boss_high_inquisitor_fairbanks.cpp b/src/server/scripts/EasternKingdoms/ScarletMonastery/boss_high_inquisitor_fairbanks.cpp
index 64a5861db26..c6532c4209c 100644
--- a/src/server/scripts/EasternKingdoms/ScarletMonastery/boss_high_inquisitor_fairbanks.cpp
+++ b/src/server/scripts/EasternKingdoms/ScarletMonastery/boss_high_inquisitor_fairbanks.cpp
@@ -146,6 +146,7 @@ struct boss_high_inquisitor_fairbanks : public BossAI
                 if (Unit* target = SelectTarget(SelectTargetMethod::MaxThreat, 0, 30.f, true, false))
                     DoCast(target, SPELL_SLEEP);
                 events.Repeat(30s);
+                break;
             default:
                 break;
         }
diff --git a/src/server/scripts/Kalimdor/CavernsOfTime/CullingOfStratholme/npc_arthas.cpp b/src/server/scripts/Kalimdor/CavernsOfTime/CullingOfStratholme/npc_arthas.cpp
index a166c9632d0..e78cdd74b11 100644
--- a/src/server/scripts/Kalimdor/CavernsOfTime/CullingOfStratholme/npc_arthas.cpp
+++ b/src/server/scripts/Kalimdor/CavernsOfTime/CullingOfStratholme/npc_arthas.cpp
@@ -1485,6 +1485,7 @@ public:
                             chromie->AI()->Talk(RP5_LINE_CHROMIE0);
                             chromie->SetFlag(UNIT_NPC_FLAGS, UNIT_NPC_FLAG_GOSSIP | UNIT_NPC_FLAG_QUESTGIVER);
                         }
+                        break;
                     default:
                         break;
                 }
diff --git a/src/server/scripts/Kalimdor/zone_bloodmyst_isle.cpp b/src/server/scripts/Kalimdor/zone_bloodmyst_isle.cpp
index 890833dadcd..450be7bb1de 100644
--- a/src/server/scripts/Kalimdor/zone_bloodmyst_isle.cpp
+++ b/src/server/scripts/Kalimdor/zone_bloodmyst_isle.cpp
@@ -333,8 +333,11 @@ public:
                     std::list<Creature*> creatureList;
                     GetCreatureListWithEntryInGrid(creatureList, me, NPC_BLOODMYST_TESLA_COIL, 500.0f);
                     if (!creatureList.empty())
+                    {
                         for (std::list<Creature*>::iterator itr = creatureList.begin(); itr != creatureList.end(); ++itr)
                             (*itr)->InterruptNonMeleeSpells(true, SPELL_BLOODMYST_TESLA);
+                    }
+                    break;
                 }
                 default:
                     break;
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
index 708be83e9b6..4b1ebf72b19 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp
@@ -693,6 +693,7 @@ class boss_professor_putricide : public CreatureScript
                                 default:
                                     break;
                             }
+                            break;
                         }
                         default:
                             break;
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_rotface.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_rotface.cpp
index 996466767a0..8a01f6ab04e 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_rotface.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_rotface.cpp
@@ -353,6 +353,7 @@ class npc_big_ooze : public CreatureScript
                         case EVENT_STICKY_OOZE:
                             DoCastVictim(SPELL_STICKY_OOZE);
                             events.ScheduleEvent(EVENT_STICKY_OOZE, 15s);
+                            break;
                         default:
                             break;
                     }
diff --git a/src/server/scripts/Northrend/Naxxramas/boss_kelthuzad.cpp b/src/server/scripts/Northrend/Naxxramas/boss_kelthuzad.cpp
index 54efc5752ea..51b8c3c864b 100644
--- a/src/server/scripts/Northrend/Naxxramas/boss_kelthuzad.cpp
+++ b/src/server/scripts/Northrend/Naxxramas/boss_kelthuzad.cpp
@@ -816,6 +816,7 @@ public:
                         me->SetImmuneToPC(true);
                         me->DespawnOrUnsummon(30 * IN_MILLISECONDS); // just in case anything interrupts the movement
                         me->GetMotionMaster()->MoveTargetedHome();
+                        break;
                     default:
                         break;
                 }
diff --git a/src/server/scripts/Northrend/Naxxramas/boss_thaddius.cpp b/src/server/scripts/Northrend/Naxxramas/boss_thaddius.cpp
index aaad0626077..2eff9a38b93 100644
--- a/src/server/scripts/Northrend/Naxxramas/boss_thaddius.cpp
+++ b/src/server/scripts/Northrend/Naxxramas/boss_thaddius.cpp
@@ -796,6 +796,7 @@ public:
                         if (GameObject* coil = myCoilGO())
                             coil->SetGoState(GO_STATE_READY);
                         me->DespawnOrUnsummon(0, Hours(24 * 7));
+                        break;
                     default:
                         break;
                 }
diff --git a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp
index 98c677586a4..c8c899e8408 100644
--- a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp
+++ b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp
@@ -355,6 +355,7 @@ class boss_flame_leviathan : public CreatureScript
                     case DATA_ORBIT_ACHIEVEMENTS:
                         if (ActiveTowers) // Only on HardMode
                             return ActiveTowersCount;
+                        break;
                     default:
                         break;
                 }
diff --git a/src/server/scripts/Outland/BlackTemple/instance_black_temple.cpp b/src/server/scripts/Outland/BlackTemple/instance_black_temple.cpp
index dcaff1cb12c..5a45994b838 100644
--- a/src/server/scripts/Outland/BlackTemple/instance_black_temple.cpp
+++ b/src/server/scripts/Outland/BlackTemple/instance_black_temple.cpp
@@ -169,6 +169,7 @@ class instance_black_temple : public InstanceMapScript
                         break;
                     case DATA_AKAMA_ILLIDAN_INTRO:
                         AkamaIllidanIntro = data;
+                        break;
                     default:
                         break;
                 }