Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

### - t -

- tab : VehicleDetailsWindow
- table : AirportSpec , SnowLine , IndustrySpec
- tag : SaveLoadFormat
- tag_count : ContentInfo
- TagNameFilter() : NewGRFAddWindow , NetworkContentListWindow
- tags : ContentInfo
- tail : NWidgetContainer
- Tcapacity : SmallArray< T, B, N >
- Tcls : CCountedPtr< Tcls_ >
- TCPConnecter() : TCPConnecter
- TE_FOOD : AICargo
- TE_GOODS : AICargo
- TE_MAIL : AICargo
- TE_NONE : AICargo
- TE_PASSENGERS : AICargo
- TE_WATER : AICargo
- TemporaryStorageArray() : TemporaryStorageArray< TYPE, SIZE >
- terraform_tile_proc : TileTypeProcs
- terrain_type : DifficultySettings
- text : CommandContainer , LoggedChange , NamePart , OskWindow
- text_btn : OskWindow
- text_dir : LanguagePackHeader , DynamicLanguages
- TEXT_INDENT : SelectCompanyLiveryWindow
- text_lines : NWidgetPart
- text_position : AboutWindow
- text_width : CompanyLeagueWindow
- tgen_smoothness : GameCreationSettings
- this_month_production : Industry
- this_month_transported : Industry
- thread : GenWorldInfo , TCPConnecter , ThreadObject_OS2 , ThreadObject_pthread , ThreadObject_Win32
- threaded : GenWorldInfo
- threaded_saves : GUISettings
- ThreadEntry() : TCPConnecter
- ThreadObject_MorphOS() : ThreadObject_MorphOS
- ThreadObject_OS2() : ThreadObject_OS2
- ThreadObject_pthread() : ThreadObject_pthread
- ThreadObject_Win32() : ThreadObject_Win32
- ThreadProc() : ThreadObject_OS2 , ThreadObject_pthread , ThreadObject_Win32
- ThrowError() : Squirrel
- tick : LoggedAction
- Tick() : Aircraft , EffectVehicle , RoadVehicle , Ship , Train , Vehicle , DisasterVehicle
- tick_counter : Vehicle
- TICKER_STOP : StatusBarWindow
- tile : FindDepotData , PBSTileInfo , TileAndStation , TerraformerHeightMod , TileInfo , TileArea , SpotData , Vehicle , CommandContainer
- TILE_INVALID : AIMap
- tile_table : TerraformerState
- tile_table_count : TerraformerState
- TileArea() : TileArea
- TileBelongsToRailStation() : BaseStation , Station , Waypoint
- tileh : TileInfo
- tiles : StationSpec
- time : IConsoleLine
- timer_enabled : BuildIndustryWindow
- timetable_arrival_departure : GUISettings
- timetable_duration : OrderList
- timetable_in_ticks : GUISettings
- timetable_start : Vehicle
- timetabling : OrderSettings
- tiny_step_height : VehicleGroupWindow
- Titem : CNodeList_HashTableT< Titem_, Thash_bits_open_, Thash_bits_closed_ >
- title : SmallFiosItem , HighScore , SettingEntrySubtree
- ToggleSelectedState() : ClientNetworkContentSocketHandler
- ToggleSortOrder() : GUIList< T, F >
- ToggleWidgetLoweredState() : Window
- token : Lexer
- tool_tip : NWidgetCore
- toolbar_pos : GUISettings
- tooltip : NWidgetPartDataTip
- top : Blitter::BlitterParams , ParentSpriteToDraw , ViewPort , ViewportSign , Window
- top_offset : AIDebugWindow
- top_spacing : MessageHistoryWindow
- total_bytes : NetworkContentDownloadStatusWindow
- total_files : NetworkContentDownloadStatusWindow
- total_offset : RailtypeInfo
- Town() : Town
- town : BaseStation , Industry , TownAuthorityWindow , TownViewWindow
- TOWN_ACTION_ADVERTISE_LARGE : AITown
- TOWN_ACTION_ADVERTISE_MEDIUM : AITown
- TOWN_ACTION_ADVERTISE_SMALL : AITown
- TOWN_ACTION_BRIBE : AITown
- TOWN_ACTION_BUILD_STATUE : AITown
- TOWN_ACTION_BUY_RIGHTS : AITown
- TOWN_ACTION_FUND_BUILDINGS : AITown
- TOWN_ACTION_ROAD_REBUILD : AITown
- town_cn : Waypoint
- town_council_tolerance : DifficultySettings
- town_effect : CargoSpec
- town_growth_rate : EconomySettings
- town_layout : EconomySettings , FoundTownWindow
- town_name : GameCreationSettings
- town_noise_population : EconomySettings
- TOWN_RATING_APPALLING : AITown
- TOWN_RATING_EXCELLENT : AITown
- TOWN_RATING_GOOD : AITown
- TOWN_RATING_INVALID : AITown
- TOWN_RATING_MEDIOCRE : AITown
- TOWN_RATING_NONE : AITown
- TOWN_RATING_OUTSTANDING : AITown
- TOWN_RATING_POOR : AITown
- TOWN_RATING_VERY_GOOD : AITown
- TOWN_RATING_VERY_POOR : AITown
- town_size : FoundTownWindow
- TownAction : AITown
- TownEffect : AICargo
- TownNameParams() : TownNameParams
- townnameparts : FoundTownWindow
- TownNameSorter() : TownDirectoryWindow
- townnamevalid : FoundTownWindow
- TownPopulationSorter() : TownDirectoryWindow
- TownRating : AITown
- Tpf : CYapfDestinationTileT< Types > , CYapfBaseT< Types > , CYapfOriginTileT< Types > , CYapfOriginTileTwoWayT< Types > , CYapfSegmentCostCacheNoneT< Types > , CYapfSegmentCostCacheLocalT< Types > , CYapfSegmentCostCacheGlobalT< Types > , CYapfFollowAnySafeTileRailT< Types > , CYapfDestinationAnyDepotRailT< Types > , CYapfDestinationAnySafeTileRailT< Types > , CYapfDestinationTileOrStationRailT< Types > , CYapfFollowShipT< Types > , CYapfCostShipT< Types > , CYapfFollowAnyDepotRailT< Types > , CYapfFollowRailT< Types > , CYapfDestinationTileRoadT< Types > , CYapfDestinationAnyDepotRoadT< Types > , CYapfFollowRoadT< Types > , CYapfCostRoadT< Types > , CYapfReserveTrack< Types > , CYapfCostRailT< Types > , CYapfShip_TypesT< Tpf_, Ttrack_follower, Tnode_list >
- track : AIRailSignalData
- track_ns : RailtypeInfo
- track_y : RailtypeInfo
- trackdir : AIRailSignalData , PBSTileInfo
- TrackFollower : CYapfCostRoadT< Types > , CYapfDestinationAnySafeTileRailT< Types > , CYapfShip_TypesT< Tpf_, Ttrack_follower, Tnode_list >
- tractive_effort : RailVehicleInfo , RoadVehicleInfo
- Train() : Train
- train_acceleration_model : VehicleSettings
- train_slope_steepness : VehicleSettings
- train_station : BaseStation
- TrainCanRunOnRail() : AIRail
- TrainHasPowerOnRail() : AIRail
- traininfo_vehicle_pitch : GRFFile
- traininfo_vehicle_width : GRFFile
- TrainSubtype : Train
- TRANSPORT_AIR : AITile
- TRANSPORT_INVALID : AITile
- transport_name : BridgeSpec
- TRANSPORT_RAIL : AITile
- TRANSPORT_ROAD : AITile
- TRANSPORT_WATER : AITile
- TransportType : AITile
- TransportTypeChar() : CYapfFollowRailT< Types > , CYapfFollowAnyDepotRailT< Types > , CYapfFollowShipT< Types > , CYapfFollowAnySafeTileRailT< Types > , CYapfFollowRoadT< Types >
- travel_time : Order
- TreatFirstRedTwoWaySignalAsEOL() : CYapfOriginTileTwoWayT< Types >
- tree_placer : GameCreationSettings
- tree_to_plant : BuildTreesWindow
- truck_station : Station
- truck_stops : Station
- Truncate() : IConsoleLine , CargoList< Tinst >
- TryPop() : CHashTableT< Titem_, Thash_bits_ >
- TryReservePath() : CYapfReserveTrack< Types >
- TryReverse() : CFollowTrackT< Ttr_type_, VehicleType, T90deg_turns_allowed_, Tmask_reserved_tracks >
- TS_ARTICULATED_PART : Train
- TS_ENGINE : Train
- TS_FREE_WAGON : Train
- TS_FRONT : Train
- TS_MULTIHEADED : Train
- TS_WAGON : Train
- Ttail_reserve : CBlobBaseSimple
- tunnel : RailtypeInfo
- turn_counter : Aircraft
- type : OldChunks , NWidgetPart , Order , MakeEnumPropsT< Tenum_t, Tstorage_t, Tbegin, Tend, Tinvalid > , IniGroup , BaseVehicle , Industry , SpriteCache , NWidgetBase , TownNameParams , LegendAndColour , AIEvent , Engine , CheatEntry , AILog::LogData , LoggedChange , NewsSubtypeData , EngineIDMapping , ContentInfo
- type_height : Tile
- Types : CYapfShip_TypesT< Tpf_, Ttrack_follower, Tnode_list >
- TypeSorter() : NetworkContentListWindow