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

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• Label() : Label< Tag >
• LabelScan() : GrfActionHandler< TAction >
• LangString() : LangString
• LanguageFileWriter() : LanguageFileWriter
• LanguagePackGlyphSearcher() : LanguagePackGlyphSearcher
• LanguageScanner() : LanguageScanner
• Last() : SpecializedVehicle< T, Type >, Vehicle
• LastCompression() : LinkGraph, LinkGraphJob
• LastUpdate() : LinkGraph::BaseEdge
• launchGameEngine: : OTTDMain
• Layouter() : Layouter
• Leave() : RoadStop::Entry, RoadStop
• LeaveStation() : Vehicle
• LeaveUnbunchingDepot() : Vehicle
• Length() : BaseSettingEntry, CBinaryHeapT< T >, SettingEntry, SettingsContainer, SettingsPage
• LibraryLoader() : LibraryLoader
• LinkGraph() : LinkGraph
• LinkGraphIndex() : LinkGraphJob
• LinkGraphJob() : LinkGraphJob
• LinkGraphOverlay() : LinkGraphOverlay
• LinkGraphSchedule() : LinkGraphSchedule
• LinkRefresher() : LinkRefresher
• Listen() : NetworkAddress, NetworkUDPSocketHandler, TCPListenHandler< Tsocket, EnumPacketType, Tfull_packet, Tban_packet >
• Load() : AIPLChunkHandler, ANITChunkHandler, BKORChunkHandler, CAPAChunkHandler, CAPRChunkHandler, CAPYChunkHandler, CHKPChunkHandler, CHTSChunkHandler, ChunkHandler, CITYChunkHandler, CMDLChunkHandler, CMPUChunkHandler, DATEChunkHandler, DefaultSaveLoadHandler< TImpl, TObject >, DEPTChunkHandler, ECMYChunkHandler, EIDSChunkHandler, ENGNChunkHandler, ENGSChunkHandler, ERNWChunkHandler, GLOGChunkHandler, GOALChunkHandler, GRPSChunkHandler, GSDTChunkHandler, GSTRChunkHandler, HotkeyList, IBLDChunkHandler, INDYChunkHandler, ITBLChunkHandler, LEAEChunkHandler, LEATChunkHandler, LGRJChunkHandler, LGRPChunkHandler, LGRSChunkHandler, M3HIChunkHandler, M3LOChunkHandler, MAP2ChunkHandler, MAP5ChunkHandler, MAP7ChunkHandler, MAP8ChunkHandler, MAPEChunkHandler, MAPHChunkHandler, MAPOChunkHandler, MAPSChunkHandler, MAPTChunkHandler, NAMEChunkHandler, NewGRFMappingChunkHandler, NGRFChunkHandler, OBJSChunkHandler, OPTSChunkHandler, ORDLChunkHandler, ORDRChunkHandler, PATSChunkHandler, PLYRChunkHandler, PRICChunkHandler, PSACChunkHandler, RAILChunkHandler, ROADChunkHandler, ROTTChunkHandler, SaveLoadHandler, ScriptInstance, SIGNChunkHandler, SlCompanyEconomy, SlCompanyLiveries, SlCompanyOldAI, SlCompanyOldAIBuildRec, SlCompanyOldEconomy, SlCompanySettings, SlGameLanguageString, SlGamelogAction, SlGamelogEmergency, SlGamelogGrfadd, SlGamelogGrfbug, SlGamelogGrfcompat, SlGamelogGrfmove, SlGamelogGrfparam, SlGamelogGrfrem, SlGamelogMode, SlGamelogOldver, SlGamelogRevision, SlGamelogSetting, SlIndustryAcceptedHistory, SlIndustryProducedHistory, SlLinkgraphEdge, SlLinkgraphJobProxy, SlLinkgraphNode, SlSkipHandler, SlStationBase, SlStationCargo, SlStationFlow, SlStationGoods, SlStationNormal, SlStationWaitingTriggers, SlStationWaypoint, SlTownAcceptanceMatrix, SlTownAcceptedHistory, SlTownOldSupplied, SlTownReceived, SlTownSuppliedHistory, SlVehicleAircraft, SlVehicleCommon, SlVehicleDisaster, SlVehicleEffect, SlVehicleRoadVeh, SlVehicleShip, SlVehicleTrain, SoundLoader, SoundLoader_Opus, SoundLoader_Raw, SoundLoader_Wav, SRNDChunkHandler, StationCargoList, STNNChunkHandler, STNSChunkHandler, STPAChunkHandler, STPEChunkHandler, SUBSChunkHandler, VectorSaveLoadHandler< TImpl, TObject, TElementType, MAX_LENGTH >, VEHSChunkHandler, VIEWChunkHandler, WaterRegionChunkHandler
• LoadCheck() : ChunkHandler, DATEChunkHandler, DefaultSaveLoadHandler< TImpl, TObject >, GLOGChunkHandler, MAPSChunkHandler, NGRFChunkHandler, PATSChunkHandler, PLYRChunkHandler, SaveLoadHandler, SlAllowListData, SlCompanyEconomy, SlCompanyLiveries, SlCompanyOldAI, SlCompanyOldAIBuildRec, SlCompanyOldEconomy, SlCompanySettings, SlGamelogAction, SlGamelogEmergency, SlGamelogGrfadd, SlGamelogGrfbug, SlGamelogGrfcompat, SlGamelogGrfmove, SlGamelogGrfparam, SlGamelogGrfrem, SlGamelogMode, SlGamelogOldver, SlGamelogRevision, SlGamelogSetting, SlOrders< T >, SlSkipHandler
• LoadCompatibilityScript() : ScriptInstance
• LoadCompatibilityScripts() : ScriptInstance
• LoadDummyScript() : AIInstance, GameInstance, ScriptInstance
• LoadEmpty() : ScriptInstance
• LoadFile() : DLSFile, MidiFile, Squirrel
• LoadFilter() : LoadFilter
• LoadFont() : CoreTextFontCacheFactory, FontCacheFactory, FontProviderManager, FreeTypeFontCacheFactory, SpriteFontCacheFactory, Win32FontCacheFactory
• LoadFontCaches() : FontCache
• LoadFromConfig() : WindowDesc
• LoadFromDisk() : IniLoadFile
• LoadMpsData() : MidiFile
• LoadObjects() : ScriptInstance
• LoadOnStack() : ScriptInstance
• LoadScript() : Squirrel
• LoadSprite() : SpriteLoader, SpriteLoaderGrf, SpriteLoaderMakeIndexed
• LoadText() : TextfileWindow
• LoadTextfile() : TextfileWindow
• LockVideoBuffer() : VideoDriver, VideoDriver_Cocoa, VideoDriver_SDL_Base, VideoDriver_Win32Base
• LogCommandExecution() : CommandHelperBase
• LogError() : BaseSet< T >, StringConsumer
• LoggedChange() : LoggedChange
• LoggedChangeEmergencySave() : LoggedChangeEmergencySave
• LoggedChangeGRFAdd() : LoggedChangeGRFAdd
• LoggedChangeGRFBug() : LoggedChangeGRFBug
• LoggedChangeGRFChanged() : LoggedChangeGRFChanged
• LoggedChangeGRFMoved() : LoggedChangeGRFMoved
• LoggedChangeGRFParameterChanged() : LoggedChangeGRFParameterChanged
• LoggedChangeGRFRemoved() : LoggedChangeGRFRemoved
• LoggedChangeMode() : LoggedChangeMode
• LoggedChangeOldVersion() : LoggedChangeOldVersion
• LoggedChangeRevision() : LoggedChangeRevision
• LoggedChangeSettingChanged() : LoggedChangeSettingChanged
• LogX() : Map
• LogY() : Map
• LookupColourInPalette() : Blitter_32bppAnim, Blitter_32bppBase
• LoopOnce() : VideoDriver_SDL_Base
• LowerWidget() : Window
• LRUCache() : LRUCache< Tkey, Tdata, Thash, Tequality >
• LZMALoadFilter() : LZMALoadFilter
• LZMASaveFilter() : LZMASaveFilter
• LZOLoadFilter() : LZOLoadFilter
• LZOSaveFilter() : LZOSaveFilter