Cleanup: TransmitNotesOff is only called with buffer==_buffer.

Assert on that.

cmake/CompileFlags.cmake

@@ -38,7 +38,11 @@ macro(compile_flags)
     set(IS_STABLE_RELEASE "$<AND:$<NOT:$<CONFIG:Debug>>,$<NOT:$<BOOL:${OPTION_USE_ASSERTS}>>>")
 
     if(MSVC)
-        add_compile_options(/W3)
+        add_compile_options(
+            /W3
+            /w34100 # 'identifier' : unreferenced formal parameter
+            /w34189 # 'identifier' : local variable is initialized but not referenced
+        )
         if(MSVC_VERSION GREATER 1929 AND MSVC_VERSION LESS 1937 AND CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
             # Starting with version 19.30 (fixed in version 19.37), there is an optimisation bug, see #9966 for details
             # This flag disables the broken optimisation to work around the bug
@@ -60,8 +64,6 @@ macro(compile_flags)
             -Winit-self
             -Wnon-virtual-dtor
 
-            # Often parameters are unused, which is fine.
-            -Wno-unused-parameter
             # We use 'ABCD' multichar for SaveLoad chunks identifiers
             -Wno-multichar
 
@@ -72,22 +74,6 @@ macro(compile_flags)
             -fno-strict-aliasing
         )
 
-        # When we are a stable release (Release build + USE_ASSERTS not set),
-        # assertations are off, which trigger a lot of warnings. We disable
-        # these warnings for these releases.
-        if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-            add_compile_options(
-                "$<${IS_STABLE_RELEASE}:-Wno-unused-variable>"
-                "$<${IS_STABLE_RELEASE}:-Wno-unused-but-set-parameter>"
-                "$<${IS_STABLE_RELEASE}:-Wno-unused-but-set-variable>"
-            )
-        else()
-            add_compile_options(
-                "$<${IS_STABLE_RELEASE}:-Wno-unused-variable>"
-                "$<${IS_STABLE_RELEASE}:-Wno-unused-parameter>"
-            )
-        endif()
-
         # Ninja processes the output so the output from the compiler
         # isn't directly to a terminal; hence, the default is
         # non-coloured output. We can override this to get nicely

src/3rdparty/squirrel/squirrel/sqbaselib.cpp

@@ -559,7 +559,7 @@ bool _hsort_sift_down(HSQUIRRELVM v,SQArray *arr, SQInteger root, SQInteger bott
 	return true;
 }
 
-bool _hsort(HSQUIRRELVM v,SQObjectPtr &arr, SQInteger l, SQInteger r,SQInteger func)
+bool _hsort(HSQUIRRELVM v,SQObjectPtr &arr, SQInteger, SQInteger,SQInteger func)
 {
 	SQArray *a = _array(arr);
 	SQInteger i;

src/3rdparty/squirrel/squirrel/sqclass.cpp

@@ -187,7 +187,7 @@ SQInstance::~SQInstance()
 	if(_class){ Finalize(); } //if _class is null it was already finalized by the GC
 }
 
-bool SQInstance::GetMetaMethod(SQVM *v,SQMetaMethod mm,SQObjectPtr &res)
+bool SQInstance::GetMetaMethod(SQVM *,SQMetaMethod mm,SQObjectPtr &res)
 {
 	if(type(_class->_metamethods[mm]) != OT_NULL) {
 		res = _class->_metamethods[mm];

src/3rdparty/squirrel/squirrel/sqobject.h

@@ -76,7 +76,7 @@ struct SQRefCounted
 	}
 
 	/* Never used but required. */
-	inline void operator delete(void *ptr) { NOT_REACHED(); }
+	inline void operator delete(void *) { NOT_REACHED(); }
 
 private:
 	size_t size;

src/3rdparty/squirrel/squirrel/sqstate.cpp

@@ -274,7 +274,7 @@ void SQSharedState::EnqueueMarkObject(SQObjectPtr &o,SQGCMarkerQueue &queue)
 }
 
 
-SQInteger SQSharedState::CollectGarbage(SQVM *vm)
+SQInteger SQSharedState::CollectGarbage(SQVM *)
 {
 	SQInteger n=0;
 	SQVM *vms = _thread(_root_vm);

src/ai/ai_gui.cpp

@@ -119,7 +119,7 @@ struct AIConfigWindow : public Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_AIC_DECREASE_NUMBER:
@@ -181,7 +181,7 @@ struct AIConfigWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (widget >= WID_AIC_TEXTFILE && widget < WID_AIC_TEXTFILE + TFT_CONTENT_END) {
 			if (this->selected_slot == INVALID_COMPANY || AIConfig::GetConfig(this->selected_slot) == nullptr) return;
@@ -267,7 +267,7 @@ struct AIConfigWindow : public Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!IsEditable(this->selected_slot)) {
 			this->selected_slot = INVALID_COMPANY;

src/aircraft_cmd.cpp

@@ -1282,7 +1282,7 @@ void HandleMissingAircraftOrders(Aircraft *v)
 }
 
 
-TileIndex Aircraft::GetOrderStationLocation(StationID station)
+TileIndex Aircraft::GetOrderStationLocation(StationID)
 {
 	/* Orders are changed in flight, ensure going to the right station. */
 	if (this->state == FLYING) {
@@ -1599,31 +1599,31 @@ static void AircraftEventHandler_AtTerminal(Aircraft *v, const AirportFTAClass *
 	AirportMove(v, apc);
 }
 
-static void AircraftEventHandler_General(Aircraft *v, const AirportFTAClass *apc)
+static void AircraftEventHandler_General(Aircraft *, const AirportFTAClass *)
 {
 	FatalError("OK, you shouldn't be here, check your Airport Scheme!");
 }
 
-static void AircraftEventHandler_TakeOff(Aircraft *v, const AirportFTAClass *apc)
+static void AircraftEventHandler_TakeOff(Aircraft *v, const AirportFTAClass *)
 {
 	PlayAircraftSound(v); // play takeoffsound for airplanes
 	v->state = STARTTAKEOFF;
 }
 
-static void AircraftEventHandler_StartTakeOff(Aircraft *v, const AirportFTAClass *apc)
+static void AircraftEventHandler_StartTakeOff(Aircraft *v, const AirportFTAClass *)
 {
 	v->state = ENDTAKEOFF;
 	v->UpdateDeltaXY();
 }
 
-static void AircraftEventHandler_EndTakeOff(Aircraft *v, const AirportFTAClass *apc)
+static void AircraftEventHandler_EndTakeOff(Aircraft *v, const AirportFTAClass *)
 {
 	v->state = FLYING;
 	/* get the next position to go to, differs per airport */
 	AircraftNextAirportPos_and_Order(v);
 }
 
-static void AircraftEventHandler_HeliTakeOff(Aircraft *v, const AirportFTAClass *apc)
+static void AircraftEventHandler_HeliTakeOff(Aircraft *v, const AirportFTAClass *)
 {
 	v->state = FLYING;
 	v->UpdateDeltaXY();
@@ -1677,7 +1677,7 @@ static void AircraftEventHandler_Flying(Aircraft *v, const AirportFTAClass *apc)
 	v->pos = apc->layout[v->pos].next_position;
 }
 
-static void AircraftEventHandler_Landing(Aircraft *v, const AirportFTAClass *apc)
+static void AircraftEventHandler_Landing(Aircraft *v, const AirportFTAClass *)
 {
 	v->state = ENDLANDING;
 	AircraftLandAirplane(v);  // maybe crash airplane
@@ -1690,7 +1690,7 @@ static void AircraftEventHandler_Landing(Aircraft *v, const AirportFTAClass *apc
 	}
 }
 
-static void AircraftEventHandler_HeliLanding(Aircraft *v, const AirportFTAClass *apc)
+static void AircraftEventHandler_HeliLanding(Aircraft *v, const AirportFTAClass *)
 {
 	v->state = HELIENDLANDING;
 	v->UpdateDeltaXY();

src/airport_gui.cpp

@@ -47,7 +47,7 @@ static void ShowBuildAirportPicker(Window *parent);
 
 SpriteID GetCustomAirportSprite(const AirportSpec *as, byte layout);
 
-void CcBuildAirport(Commands cmd, const CommandCost &result, TileIndex tile)
+void CcBuildAirport(Commands, const CommandCost &result, TileIndex tile)
 {
 	if (result.Failed()) return;
 
@@ -102,7 +102,7 @@ struct BuildAirToolbarWindow : Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 
@@ -118,7 +118,7 @@ struct BuildAirToolbarWindow : Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_AT_AIRPORT:
@@ -138,7 +138,7 @@ struct BuildAirToolbarWindow : Window {
 	}
 
 
-	void OnPlaceObject(Point pt, TileIndex tile) override
+	void OnPlaceObject([[maybe_unused]] Point pt, TileIndex tile) override
 	{
 		switch (this->last_user_action) {
 			case WID_AT_AIRPORT:
@@ -153,12 +153,12 @@ struct BuildAirToolbarWindow : Window {
 		}
 	}
 
-	void OnPlaceDrag(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt) override
+	void OnPlaceDrag(ViewportPlaceMethod select_method, [[maybe_unused]] ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt) override
 	{
 		VpSelectTilesWithMethod(pt.x, pt.y, select_method);
 	}
 
-	void OnPlaceMouseUp(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt, TileIndex start_tile, TileIndex end_tile) override
+	void OnPlaceMouseUp([[maybe_unused]] ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt, TileIndex start_tile, TileIndex end_tile) override
 	{
 		if (pt.x != -1 && select_proc == DDSP_DEMOLISH_AREA) {
 			GUIPlaceProcDragXY(select_proc, start_tile, end_tile);
@@ -316,7 +316,7 @@ public:
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_AP_CLASS_DROPDOWN: {
@@ -487,7 +487,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_AP_CLASS_DROPDOWN:
@@ -563,13 +563,14 @@ public:
 
 	void OnDropdownSelect(int widget, int index) override
 	{
-		assert(widget == WID_AP_CLASS_DROPDOWN);
-		_selected_airport_class = (AirportClassID)index;
-		this->vscroll->SetCount(AirportClass::Get(_selected_airport_class)->GetSpecCount());
-		this->SelectFirstAvailableAirport(false);
+		if (widget == WID_AP_CLASS_DROPDOWN) {
+			_selected_airport_class = (AirportClassID)index;
+			this->vscroll->SetCount(AirportClass::Get(_selected_airport_class)->GetSpecCount());
+			this->SelectFirstAvailableAirport(false);
+		}
 	}
 
-	void OnRealtimeTick(uint delta_ms) override
+	void OnRealtimeTick([[maybe_unused]] uint delta_ms) override
 	{
 		CheckRedrawStationCoverage(this);
 	}

src/autoreplace_gui.cpp

@@ -300,7 +300,7 @@ public:
 		this->sel_group = id_g;
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_RV_SORT_ASCENDING_DESCENDING: {
@@ -539,7 +539,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_RV_SORT_ASCENDING_DESCENDING:
@@ -712,7 +712,7 @@ public:
 		}
 	}
 
-	bool OnTooltip(Point pt, int widget, TooltipCloseCondition close_cond) override
+	bool OnTooltip([[maybe_unused]] Point pt, int widget, TooltipCloseCondition close_cond) override
 	{
 		if (widget != WID_RV_TRAIN_WAGONREMOVE_TOGGLE) return false;
 
@@ -736,7 +736,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (data != 0) {
 			/* This needs to be done in command-scope to enforce rebuilding before resorting invalid data */

src/base_media_func.h

@@ -153,7 +153,7 @@ bool BaseSet<T, Tnum_files, Tsearch_in_tars>::FillSetDetails(IniFile *ini, const
 }
 
 template <class Tbase_set>
-bool BaseMedia<Tbase_set>::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
+bool BaseMedia<Tbase_set>::AddFile(const std::string &filename, size_t basepath_length, const std::string &)
 {
 	bool ret = false;
 	Debug(grf, 1, "Checking {} for base " SET_TYPE " set", filename);

src/blitter/32bpp_base.cpp

@@ -145,7 +145,7 @@ size_t Blitter_32bppBase::BufferSize(uint width, uint height)
 	return sizeof(uint32_t) * width * height;
 }
 
-void Blitter_32bppBase::PaletteAnimate(const Palette &palette)
+void Blitter_32bppBase::PaletteAnimate(const Palette &)
 {
 	/* By default, 32bpp doesn't have palette animation */
 }

src/blitter/32bpp_sse_func.hpp

@@ -154,7 +154,7 @@ static inline Colour AdjustBrightneSSE(Colour colour, uint8_t brightness)
 }
 
 GNU_TARGET(SSE_TARGET)
-static inline __m128i AdjustBrightnessOfTwoPixels(__m128i from, uint32_t brightness)
+static inline __m128i AdjustBrightnessOfTwoPixels([[maybe_unused]] __m128i from, [[maybe_unused]] uint32_t brightness)
 {
 #if (SSE_VERSION < 3)
 	NOT_REACHED();

src/blitter/8bpp_base.cpp

@@ -149,7 +149,7 @@ size_t Blitter_8bppBase::BufferSize(uint width, uint height)
 	return static_cast<size_t>(width) * height;
 }
 
-void Blitter_8bppBase::PaletteAnimate(const Palette &palette)
+void Blitter_8bppBase::PaletteAnimate(const Palette &)
 {
 	/* Video backend takes care of the palette animation */
 }

src/blitter/null.hpp

@@ -16,19 +16,19 @@
 class Blitter_Null : public Blitter {
 public:
 	uint8_t GetScreenDepth() override { return 0; }
-	void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) override {};
-	void DrawColourMappingRect(void *dst, int width, int height, PaletteID pal) override {};
+	void Draw(Blitter::BlitterParams *, BlitterMode, ZoomLevel) override {};
+	void DrawColourMappingRect(void *, int, int, PaletteID) override {};
 	Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) override;
-	void *MoveTo(void *video, int x, int y) override { return nullptr; };
-	void SetPixel(void *video, int x, int y, uint8_t colour) override {};
-	void DrawRect(void *video, int width, int height, uint8_t colour) override {};
-	void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8_t colour, int width, int dash) override {};
-	void CopyFromBuffer(void *video, const void *src, int width, int height) override {};
-	void CopyToBuffer(const void *video, void *dst, int width, int height) override {};
-	void CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) override {};
-	void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) override {};
-	size_t BufferSize(uint width, uint height) override { return 0; };
-	void PaletteAnimate(const Palette &palette) override { };
+	void *MoveTo(void *, int, int) override { return nullptr; };
+	void SetPixel(void *, int, int, uint8_t) override {};
+	void DrawRect(void *, int, int, uint8_t) override {};
+	void DrawLine(void *, int, int, int, int, int, int, uint8_t, int, int) override {};
+	void CopyFromBuffer(void *, const void *, int, int) override {};
+	void CopyToBuffer(const void *, void *, int, int) override {};
+	void CopyImageToBuffer(const void *, void *, int, int, int) override {};
+	void ScrollBuffer(void *, int &, int &, int &, int &, int, int) override {};
+	size_t BufferSize(uint, uint) override { return 0; };
+	void PaletteAnimate(const Palette &) override { };
 	Blitter::PaletteAnimation UsePaletteAnimation() override { return Blitter::PALETTE_ANIMATION_NONE; };
 
 	const char *GetName() override { return "null"; }

src/bootstrap_gui.cpp

@@ -56,7 +56,7 @@ public:
 		ResizeWindow(this, _screen.width, _screen.height);
 	}
 
-	void DrawWidget(const Rect &r, int widget) const override
+	void DrawWidget(const Rect &r, int) const override
 	{
 		GfxFillRect(r.left, r.top, r.right, r.bottom, 4, FILLRECT_OPAQUE);
 		GfxFillRect(r.left, r.top, r.right, r.bottom, 0, FILLRECT_CHECKER);
@@ -98,7 +98,7 @@ public:
 		this->Window::Close();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget == WID_BEM_MESSAGE) {
 			*size = GetStringBoundingBox(STR_MISSING_GRAPHICS_ERROR);
@@ -114,7 +114,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (widget == WID_BEM_QUIT) {
 			_exit_game = true;
@@ -159,7 +159,7 @@ public:
 		this->BaseNetworkContentDownloadStatusWindow::Close();
 	}
 
-	void OnDownloadComplete(ContentID cid) override
+	void OnDownloadComplete(ContentID) override
 	{
 		/* We have completed downloading. We can trigger finding the right set now. */
 		BaseGraphics::FindSets();
@@ -214,7 +214,7 @@ public:
 		this->Window::Close();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		/* We cache the button size. This is safe as no reinit can happen here. */
 		if (this->button_size.width == 0) {
@@ -244,7 +244,7 @@ public:
 		DrawStringMultiLine(r.Shrink(WidgetDimensions::scaled.frametext), STR_MISSING_GRAPHICS_SET_MESSAGE, TC_FROMSTRING, SA_CENTER);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_BAFD_YES:
@@ -334,7 +334,7 @@ public:
 		EM_ASM({ if (window["openttd_bootstrap"]) openttd_bootstrap($0, $1); }, this->downloaded_bytes, this->total_bytes);
 	}
 
-	void OnDownloadProgress(const ContentInfo *ci, int bytes) override
+	void OnDownloadProgress(const ContentInfo *, int bytes) override
 	{
 		/* A negative value means we are resetting; for example, when retrying or using a fallback. */
 		if (bytes < 0) {
@@ -346,7 +346,7 @@ public:
 		EM_ASM({ if (window["openttd_bootstrap"]) openttd_bootstrap($0, $1); }, this->downloaded_bytes, this->total_bytes);
 	}
 
-	void OnDownloadComplete(ContentID cid) override
+	void OnDownloadComplete(ContentID) override
 	{
 		/* _exit_game is used to break out of the outer video driver's MainLoop. */
 		_exit_game = true;

src/bridge_gui.cpp

@@ -50,12 +50,11 @@ typedef GUIList<BuildBridgeData> GUIBridgeList; ///< List of bridges, used in #B
  * Callback executed after a build Bridge CMD has been called
  *
  * @param result Whether the build succeeded
- * @param cmd unused
  * @param end_tile End tile of the bridge.
  * @param tile_start start tile
  * @param transport_type transport type.
  */
-void CcBuildBridge(Commands cmd, const CommandCost &result, TileIndex end_tile, TileIndex tile_start, TransportType transport_type, BridgeType, byte)
+void CcBuildBridge(Commands, const CommandCost &result, TileIndex end_tile, TileIndex tile_start, TransportType transport_type, BridgeType, byte)
 {
 	if (result.Failed()) return;
 	if (_settings_client.sound.confirm) SndPlayTileFx(SND_27_CONSTRUCTION_BRIDGE, end_tile);
@@ -175,7 +174,7 @@ public:
 		this->last_sorting = this->bridges.GetListing();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_BBS_DROPDOWN_ORDER: {
@@ -212,7 +211,7 @@ public:
 		}
 	}
 
-	Point OnInitialPosition(int16_t sm_width, int16_t sm_height, int window_number) override
+	Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override
 	{
 		/* Position the window so hopefully the first bridge from the list is under the mouse pointer. */
 		NWidgetBase *list = this->GetWidget<NWidgetBase>(WID_BBS_BRIDGE_LIST);
@@ -244,7 +243,7 @@ public:
 		}
 	}
 
-	EventState OnKeyPress(char32_t key, uint16_t keycode) override
+	EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
 	{
 		const uint8_t i = keycode - '1';
 		if (i < 9 && i < this->bridges.size()) {
@@ -256,7 +255,7 @@ public:
 		return ES_NOT_HANDLED;
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			default: break;

src/build_vehicle_gui.cpp

@@ -1581,7 +1581,7 @@ struct BuildVehicleWindow : Window {
 		this->eng_list.RebuildDone();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_BV_SORT_ASCENDING_DESCENDING:
@@ -1688,7 +1688,7 @@ struct BuildVehicleWindow : Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		/* When switching to original acceleration model for road vehicles, clear the selected sort criteria if it is not available now. */
@@ -1736,7 +1736,7 @@ struct BuildVehicleWindow : Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_BV_LIST:

src/cargoaction.cpp

@@ -120,7 +120,7 @@ bool CargoLoad::operator()(CargoPacket *cp)
 {
 	CargoPacket *cp_new = this->Preprocess(cp);
 	if (cp_new == nullptr) return false;
-	cp_new->SetSourceXY(this->current_tile);
+	cp_new->UpdateLoadingTile(this->current_tile);
 	this->source->RemoveFromCache(cp_new, cp_new->Count());
 	this->destination->Append(cp_new, VehicleCargoList::MTA_KEEP);
 	return cp_new == cp;
@@ -135,7 +135,7 @@ bool CargoReservation::operator()(CargoPacket *cp)
 {
 	CargoPacket *cp_new = this->Preprocess(cp);
 	if (cp_new == nullptr) return false;
-	cp_new->SetSourceXY(this->current_tile);
+	cp_new->UpdateLoadingTile(this->current_tile);
 	this->source->reserved_count += cp_new->Count();
 	this->source->RemoveFromCache(cp_new, cp_new->Count());
 	this->destination->Append(cp_new, VehicleCargoList::MTA_LOAD);
@@ -152,6 +152,7 @@ bool CargoReturn::operator()(CargoPacket *cp)
 	CargoPacket *cp_new = this->Preprocess(cp);
 	if (cp_new == nullptr) cp_new = cp;
 	assert(cp_new->Count() <= this->destination->reserved_count);
+	cp_new->UpdateUnloadingTile(this->current_tile);
 	this->source->RemoveFromMeta(cp_new, VehicleCargoList::MTA_LOAD, cp_new->Count());
 	this->destination->reserved_count -= cp_new->Count();
 	this->destination->Append(cp_new, this->next);
@@ -167,6 +168,7 @@ bool CargoTransfer::operator()(CargoPacket *cp)
 {
 	CargoPacket *cp_new = this->Preprocess(cp);
 	if (cp_new == nullptr) return false;
+	cp_new->UpdateUnloadingTile(this->current_tile);
 	this->source->RemoveFromMeta(cp_new, VehicleCargoList::MTA_TRANSFER, cp_new->Count());
 	/* No transfer credits here as they were already granted during Stage(). */
 	this->destination->Append(cp_new, cp_new->GetNextHop());

src/cargoaction.h

@@ -70,9 +70,11 @@ public:
 
 /** Action of transferring cargo from a vehicle to a station. */
 class CargoTransfer : public CargoMovement<VehicleCargoList, StationCargoList> {
+protected:
+	TileIndex current_tile; ///< Current tile cargo unloading is happening.
 public:
-	CargoTransfer(VehicleCargoList *source, StationCargoList *destination, uint max_move) :
-			CargoMovement<VehicleCargoList, StationCargoList>(source, destination, max_move) {}
+	CargoTransfer(VehicleCargoList *source, StationCargoList *destination, uint max_move, TileIndex current_tile) :
+			CargoMovement<VehicleCargoList, StationCargoList>(source, destination, max_move), current_tile(current_tile) {}
 	bool operator()(CargoPacket *cp);
 };
 
@@ -96,10 +98,12 @@ public:
 
 /** Action of returning previously reserved cargo from the vehicle to the station. */
 class CargoReturn : public CargoMovement<VehicleCargoList, StationCargoList> {
+protected:
+	TileIndex current_tile; ///< Current tile cargo unloading is happening.
 	StationID next;
 public:
-	CargoReturn(VehicleCargoList *source, StationCargoList *destination, uint max_move, StationID next) :
-			CargoMovement<VehicleCargoList, StationCargoList>(source, destination, max_move), next(next) {}
+	CargoReturn(VehicleCargoList *source, StationCargoList *destination, uint max_move, StationID next, TileIndex current_tile) :
+			CargoMovement<VehicleCargoList, StationCargoList>(source, destination, max_move), current_tile(current_tile), next(next) {}
 	bool operator()(CargoPacket *cp);
 };
 

src/cargopacket.cpp

@@ -79,8 +79,12 @@ CargoPacket::CargoPacket(uint16_t count, Money feeder_share, CargoPacket &origin
 		periods_in_transit(original.periods_in_transit),
 		feeder_share(feeder_share),
 		source_xy(original.source_xy),
+		travelled(original.travelled),
 		source_id(original.source_id),
 		source_type(original.source_type),
+#ifdef WITH_ASSERT
+		in_vehicle(original.in_vehicle),
+#endif /* WITH_ASSERT */
 		first_station(original.first_station),
 		next_hop(original.next_hop)
 {
@@ -587,12 +591,13 @@ uint VehicleCargoList::Reassign<VehicleCargoList::MTA_DELIVER, VehicleCargoList:
  * @param max_move Maximum amount of cargo to move.
  * @param dest Station the cargo is returned to.
  * @param next ID of the next station the cargo wants to go to.
+ * @param current_tile Current tile the cargo handling is happening on.
  * @return Amount of cargo actually returned.
  */
-uint VehicleCargoList::Return(uint max_move, StationCargoList *dest, StationID next)
+uint VehicleCargoList::Return(uint max_move, StationCargoList *dest, StationID next, TileIndex current_tile)
 {
 	max_move = std::min(this->action_counts[MTA_LOAD], max_move);
-	this->PopCargo(CargoReturn(this, dest, max_move, next));
+	this->PopCargo(CargoReturn(this, dest, max_move, next, current_tile));
 	return max_move;
 }
 
@@ -623,7 +628,7 @@ uint VehicleCargoList::Unload(uint max_move, StationCargoList *dest, CargoPaymen
 	uint moved = 0;
 	if (this->action_counts[MTA_TRANSFER] > 0) {
 		uint move = std::min(this->action_counts[MTA_TRANSFER], max_move);
-		this->ShiftCargo(CargoTransfer(this, dest, move));
+		this->ShiftCargo(CargoTransfer(this, dest, move, current_tile));
 		moved += move;
 	}
 	if (this->action_counts[MTA_TRANSFER] == 0 && this->action_counts[MTA_DELIVER] > 0 && moved < max_move) {

src/cargopacket.h

@@ -39,15 +39,27 @@ extern SaveLoadTable GetCargoPacketDesc();
  */
 struct CargoPacket : CargoPacketPool::PoolItem<&_cargopacket_pool> {
 private:
+	/* A mathematical vector from (0,0). */
+	struct Vector {
+		int16_t x;
+		int16_t y;
+	};
+
 	uint16_t count{0}; ///< The amount of cargo in this packet.
 	uint16_t periods_in_transit{0}; ///< Amount of cargo aging periods this packet has been in transit.
 
 	Money feeder_share{0}; ///< Value of feeder pickup to be paid for on delivery of cargo.
 
 	TileIndex source_xy{INVALID_TILE}; ///< The origin of the cargo.
+	Vector travelled{0, 0}; ///< If cargo is in station: the vector from the unload tile to the source tile. If in vehicle: an intermediate value.
+
 	SourceID source_id{INVALID_SOURCE}; ///< Index of industry/town/HQ, INVALID_SOURCE if unknown/invalid.
 	SourceType source_type{SourceType::Industry}; ///< Type of \c source_id.
 
+#ifdef WITH_ASSERT
+	bool in_vehicle{false}; ///< NOSAVE: Whether this cargo is in a vehicle or not.
+#endif /* WITH_ASSERT */
+
 	StationID first_station{INVALID_STATION}; ///< The station where the cargo came from first.
 	StationID next_hop{INVALID_STATION}; ///< Station where the cargo wants to go next.
 
@@ -83,22 +95,51 @@ public:
 	}
 
 	/**
-	 * Set the origin of the packet.
+	 * Update for the cargo being loaded on this tile.
 	 *
-	 * Can only be set once.
+	 * When a CargoPacket is created, it is moved to a station. But at that
+	 * moment in time it is not known yet at which tile the cargo will be
+	 * picked up. As this tile is used for payment information, we delay
+	 * setting the source_xy till first pickup, getting a better idea where
+	 * a cargo started from.
 	 *
-	 * When a packet is created, it is moved to a station. But at that moment
-	 * in time it is not known yet at which tile the cargo will be picked up.
-	 * As this tile is used for payment information, we delay setting the
-	 * source_xy till first pickup.
+	 * Further more, we keep track of the amount of tiles the cargo moved
+	 * inside a vehicle. This is used in GetDistance() below.
 	 *
 	 * @param tile Tile the cargo is being picked up from.
 	 */
-	void SetSourceXY(TileIndex tile)
+	void UpdateLoadingTile(TileIndex tile)
 	{
 		if (this->source_xy == INVALID_TILE) {
 			this->source_xy = tile;
 		}
+
+#ifdef WITH_ASSERT
+		assert(!this->in_vehicle);
+		this->in_vehicle = true;
+#endif /* WITH_ASSERT */
+
+		/* We want to calculate the vector from tile-unload to tile-load. As
+		 * we currently only know the latter, add it. When we know where we unload,
+		 * we subtract is, giving us our vector (unload - load). */
+		this->travelled.x += TileX(tile);
+		this->travelled.y += TileY(tile);
+	}
+
+	/**
+	 * Update for the cargo being unloaded on this tile.
+	 *
+	 * @param tile Tile the cargo is being dropped off at.
+	 */
+	void UpdateUnloadingTile(TileIndex tile)
+	{
+#ifdef WITH_ASSERT
+		assert(this->in_vehicle);
+		this->in_vehicle = false;
+#endif /* WITH_ASSERT */
+
+		this->travelled.x -= TileX(tile);
+		this->travelled.y -= TileY(tile);
 	}
 
 	/**
@@ -188,7 +229,36 @@ public:
 	inline uint GetDistance(TileIndex current_tile) const
 	{
 		assert(this->source_xy != INVALID_TILE);
-		return DistanceManhattan(this->source_xy, current_tile);
+#ifdef WITH_ASSERT
+		assert(this->in_vehicle);
+#endif /* WITH_ASSERT */
+
+		/* Distance is always requested when the cargo is still inside the
+		 * vehicle. So first finish the calculation for travelled to
+		 * become a vector. */
+		auto local_travelled = travelled;
+		local_travelled.x -= TileX(current_tile);
+		local_travelled.y -= TileY(current_tile);
+
+		/* Cargo-movement is a vector that indicates how much the cargo has
+		 * actually traveled in a vehicle. This is the distance you get paid
+		 * for. However, one could construct a route where this vector would
+		 * be really long. To not overpay the player, cap out at the distance
+		 * between source and destination.
+		 *
+		 * This way of calculating is to counter people moving cargo for free
+		 * and instantly in stations, where you deliver it in one part of the
+		 * station and pick it up in another. By using the actual distance
+		 * traveled in a vehicle, using this trick doesn't give you more money.
+		 *
+		 * However, especially in large networks with large transfer station,
+		 * etc, one could actually make the route a lot longer. In that case,
+		 * use the actual distance between source and destination.
+		 */
+
+		uint distance_travelled = abs(local_travelled.x) + abs(local_travelled.y);
+		uint distance_source_dest = DistanceManhattan(this->source_xy, current_tile);
+		return std::min(distance_travelled, distance_source_dest);
 	}
 
 	/**
@@ -427,7 +497,7 @@ public:
 
 	template<MoveToAction Tfrom, MoveToAction Tto>
 	uint Reassign(uint max_move);
-	uint Return(uint max_move, StationCargoList *dest, StationID next_station);
+	uint Return(uint max_move, StationCargoList *dest, StationID next_station, TileIndex current_tile);
 	uint Unload(uint max_move, StationCargoList *dest, CargoPayment *payment, TileIndex current_tile);
 	uint Shift(uint max_move, VehicleCargoList *dest);
 	uint Truncate(uint max_move = UINT_MAX);

src/cheat_gui.cpp

@@ -51,11 +51,10 @@ static int32_t _money_cheat_amount = 10000000;
  * Note that the amount of money of a company must be changed through a command
  * rather than by setting a variable. Since the cheat data structure expects a
  * variable, the amount of given/taken money is used for this purpose.
- * @param new_value not used.
  * @param change_direction is -1 or +1 (down/up)
  * @return Amount of money cheat.
  */
-static int32_t ClickMoneyCheat(int32_t new_value, int32_t change_direction)
+static int32_t ClickMoneyCheat(int32_t, int32_t change_direction)
 {
 	Command<CMD_MONEY_CHEAT>::Post(Money(_money_cheat_amount) * change_direction);
 	return _money_cheat_amount;
@@ -83,10 +82,9 @@ static int32_t ClickChangeCompanyCheat(int32_t new_value, int32_t change_directi
 /**
  * Allow (or disallow) changing production of all industries.
  * @param new_value new value
- * @param change_direction unused
  * @return New value allowing change of industry production.
  */
-static int32_t ClickSetProdCheat(int32_t new_value, int32_t change_direction)
+static int32_t ClickSetProdCheat(int32_t new_value, int32_t)
 {
 	_cheats.setup_prod.value = (new_value != 0);
 	InvalidateWindowClassesData(WC_INDUSTRY_VIEW);
@@ -98,10 +96,9 @@ extern void EnginesMonthlyLoop();
 /**
  * Handle changing of the current year.
  * @param new_value The chosen year to change to.
- * @param change_direction +1 (increase) or -1 (decrease).
  * @return New year.
  */
-static int32_t ClickChangeDateCheat(int32_t new_value, int32_t change_direction)
+static int32_t ClickChangeDateCheat(int32_t new_value, int32_t)
 {
 	/* Don't allow changing to an invalid year, or the current year. */
 	auto new_year = Clamp(TimerGameCalendar::Year(new_value), CalendarTime::MIN_YEAR, CalendarTime::MAX_YEAR);
@@ -131,11 +128,10 @@ static int32_t ClickChangeDateCheat(int32_t new_value, int32_t change_direction)
 /**
  * Allow (or disallow) a change of the maximum allowed heightlevel.
  * @param new_value new value
- * @param change_direction unused
  * @return New value (or unchanged old value) of the maximum
  *         allowed heightlevel value.
  */
-static int32_t ClickChangeMaxHlCheat(int32_t new_value, int32_t change_direction)
+static int32_t ClickChangeMaxHlCheat(int32_t new_value, int32_t)
 {
 	new_value = Clamp(new_value, MIN_MAP_HEIGHT_LIMIT, MAX_MAP_HEIGHT_LIMIT);
 
@@ -301,7 +297,7 @@ struct CheatWindow : Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_C_PANEL) return;
 
@@ -347,8 +343,10 @@ struct CheatWindow : Window {
 		size->height = WidgetDimensions::scaled.framerect.Vertical() + this->line_height * lengthof(_cheats_ui);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
+		if (widget != WID_C_PANEL) return;
+
 		Rect r = this->GetWidget<NWidgetBase>(WID_C_PANEL)->GetCurrentRect().Shrink(WidgetDimensions::scaled.framerect);
 		uint btn = (pt.y - r.top) / this->line_height;
 		uint x = pt.x - r.left;

src/clear_cmd.cpp

@@ -127,7 +127,7 @@ static void DrawTile_Clear(TileInfo *ti)
 	DrawBridgeMiddle(ti);
 }
 
-static int GetSlopePixelZ_Clear(TileIndex tile, uint x, uint y, bool ground_vehicle)
+static int GetSlopePixelZ_Clear(TileIndex tile, uint x, uint y, bool)
 {
 	int z;
 	Slope tileh = GetTilePixelSlope(tile, &z);
@@ -135,7 +135,7 @@ static int GetSlopePixelZ_Clear(TileIndex tile, uint x, uint y, bool ground_vehi
 	return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
 }
 
-static Foundation GetFoundation_Clear(TileIndex tile, Slope tileh)
+static Foundation GetFoundation_Clear(TileIndex, Slope)
 {
 	return FOUNDATION_NONE;
 }
@@ -341,7 +341,7 @@ get_out:;
 	} while (--i);
 }
 
-static TrackStatus GetTileTrackStatus_Clear(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
+static TrackStatus GetTileTrackStatus_Clear(TileIndex, TransportType, uint, DiagDirection)
 {
 	return 0;
 }
@@ -365,12 +365,12 @@ static void GetTileDesc_Clear(TileIndex tile, TileDesc *td)
 	td->owner[0] = GetTileOwner(tile);
 }
 
-static void ChangeTileOwner_Clear(TileIndex tile, Owner old_owner, Owner new_owner)
+static void ChangeTileOwner_Clear(TileIndex, Owner, Owner)
 {
 	return;
 }
 
-static CommandCost TerraformTile_Clear(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
+static CommandCost TerraformTile_Clear(TileIndex tile, DoCommandFlag flags, int, Slope)
 {
 	return Command<CMD_LANDSCAPE_CLEAR>::Do(flags, tile);
 }

src/command.cpp

@@ -280,11 +280,10 @@ void CommandHelperBase::LogCommandExecution(Commands cmd, StringID err_message,
 /**
  * Prepare for the test run of a command proc call.
  * @param cmd_flags Command flags.
- * @param tile Tile of command execution.
  * @param[in,out] cur_company Backup of current company at start of command execution.
  * @return True if test run can go ahead, false on error.
  */
-bool CommandHelperBase::InternalExecutePrepTest(CommandFlags cmd_flags, TileIndex tile, Backup<CompanyID> &cur_company)
+bool CommandHelperBase::InternalExecutePrepTest(CommandFlags cmd_flags, TileIndex, Backup<CompanyID> &cur_company)
 {
 	/* Always execute server and spectator commands as spectator */
 	bool exec_as_spectator = (cmd_flags & (CMD_SPECTATOR | CMD_SERVER)) != 0;
@@ -314,7 +313,7 @@ bool CommandHelperBase::InternalExecutePrepTest(CommandFlags cmd_flags, TileInde
  * @param[in,out] cur_company Backup of current company at start of command execution.
  * @return True if test run can go ahead, false on error.
  */
-std::tuple<bool, bool, bool> CommandHelperBase::InternalExecuteValidateTestAndPrepExec(CommandCost &res, CommandFlags cmd_flags, bool estimate_only, bool network_command, Backup<CompanyID> &cur_company)
+std::tuple<bool, bool, bool> CommandHelperBase::InternalExecuteValidateTestAndPrepExec(CommandCost &res, CommandFlags cmd_flags, bool estimate_only, bool network_command, [[maybe_unused]] Backup<CompanyID> &cur_company)
 {
 	BasePersistentStorageArray::SwitchMode(PSM_LEAVE_TESTMODE);
 	SetTownRatingTestMode(false);
@@ -354,7 +353,7 @@ std::tuple<bool, bool, bool> CommandHelperBase::InternalExecuteValidateTestAndPr
  * @param[in,out] cur_company Backup of current company at start of command execution.
  * @return Final command result.
  */
-CommandCost CommandHelperBase::InternalExecuteProcessResult(Commands cmd, CommandFlags cmd_flags, const CommandCost &res_test, const CommandCost &res_exec, Money extra_cash, TileIndex tile, Backup<CompanyID> &cur_company)
+CommandCost CommandHelperBase::InternalExecuteProcessResult(Commands cmd, CommandFlags cmd_flags, [[maybe_unused]] const CommandCost &res_test, const CommandCost &res_exec, Money extra_cash, TileIndex tile, Backup<CompanyID> &cur_company)
 {
 	BasePersistentStorageArray::SwitchMode(PSM_LEAVE_COMMAND);
 

src/command_func.h

@@ -257,7 +257,7 @@ public:
 protected:
 	/** Helper to process a single ClientID argument. */
 	template <class T>
-	static inline void SetClientIdHelper(T &data)
+	static inline void SetClientIdHelper([[maybe_unused]] T &data)
 	{
 		if constexpr (std::is_same_v<ClientID, T>) {
 			if (data == INVALID_CLIENT_ID) data = CLIENT_ID_SERVER;
@@ -333,7 +333,7 @@ protected:
 
 	/** Helper to process a single ClientID argument. */
 	template <class T>
-	static inline bool ClientIdIsSet(T &data)
+	static inline bool ClientIdIsSet([[maybe_unused]] T &data)
 	{
 		if constexpr (std::is_same_v<ClientID, T>) {
 			return data != INVALID_CLIENT_ID;
@@ -350,7 +350,7 @@ protected:
 	}
 
 	template<class Ttuple>
-	static inline Money ExtractAdditionalMoney(Ttuple &values)
+	static inline Money ExtractAdditionalMoney([[maybe_unused]] Ttuple &values)
 	{
 		if constexpr (std::is_same_v<std::tuple_element_t<1, Tret>, Money>) {
 			return std::get<1>(values);
@@ -359,7 +359,7 @@ protected:
 		}
 	}
 
-	static Tret Execute(StringID err_message, CommandCallback *callback, bool my_cmd, bool estimate_only, bool network_command, TileIndex tile, std::tuple<Targs...> args)
+	static Tret Execute(StringID err_message, CommandCallback *callback, bool, bool estimate_only, bool network_command, TileIndex tile, std::tuple<Targs...> args)
 	{
 		/* Prevent recursion; it gives a mess over the network */
 		RecursiveCommandCounter counter{};

src/company_gui.cpp

@@ -396,7 +396,7 @@ struct CompanyFinancesWindow : Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_CF_EXPS_CATEGORY:
@@ -492,7 +492,7 @@ struct CompanyFinancesWindow : Window {
 		this->DrawWidgets();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_CF_TOGGLE_SIZE: // toggle size
@@ -597,7 +597,7 @@ public:
 		return ScaleGUITrad(28) + WidgetDimensions::scaled.hsep_normal + GetStringBoundingBox(this->String()).width + WidgetDimensions::scaled.dropdowntext.Horizontal();
 	}
 
-	uint Height(uint width) const override
+	uint Height(uint) const override
 	{
 		return std::max(FONT_HEIGHT_NORMAL, ScaleGUITrad(12) + WidgetDimensions::scaled.vsep_normal);
 	}
@@ -607,7 +607,7 @@ public:
 		return true;
 	}
 
-	void Draw(const Rect &r, bool sel, Colours bg_colour) const override
+	void Draw(const Rect &r, bool sel, Colours) const override
 	{
 		bool rtl = _current_text_dir == TD_RTL;
 		int icon_y = CenterBounds(r.top, r.bottom, 0);
@@ -806,7 +806,7 @@ public:
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_SCL_SPACER_DROPDOWN: {
@@ -977,7 +977,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			/* Livery Class buttons */
@@ -1082,7 +1082,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 
@@ -1471,7 +1471,7 @@ public:
 		this->number_dim = number_dim;
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_SCMF_HAS_MOUSTACHE_EARRING_TEXT:
@@ -1647,7 +1647,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			/* Toggle size, advanced/simple face selection */
@@ -1909,7 +1909,7 @@ struct CompanyInfrastructureWindow : Window
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		const Company *c = Company::Get((CompanyID)this->window_number);
 
@@ -2136,7 +2136,7 @@ struct CompanyInfrastructureWindow : Window
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 
@@ -2359,7 +2359,7 @@ struct CompanyWindow : Window
 		this->DrawWidgets();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_C_FACE: {
@@ -2545,7 +2545,7 @@ struct CompanyWindow : Window
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_C_NEW_FACE: DoSelectCompanyManagerFace(this); break;
@@ -2641,7 +2641,7 @@ struct CompanyWindow : Window
 		this->SetDirty();
 	}};
 
-	void OnPlaceObject(Point pt, TileIndex tile) override
+	void OnPlaceObject([[maybe_unused]] Point pt, TileIndex tile) override
 	{
 		if (Command<CMD_BUILD_OBJECT>::Post(STR_ERROR_CAN_T_BUILD_COMPANY_HEADQUARTERS, tile, OBJECT_HQ, 0) && !_shift_pressed) {
 			ResetObjectToPlace();
@@ -2719,7 +2719,7 @@ struct BuyCompanyWindow : Window {
 		this->company_value = hostile_takeover ? CalculateHostileTakeoverValue(c) : c->bankrupt_value;
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_BC_FACE:
@@ -2764,7 +2764,7 @@ struct BuyCompanyWindow : Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_BC_NO:

src/company_manager_face.h

@@ -93,7 +93,7 @@ static_assert(lengthof(_cmf_info) == CMFV_END);
  * @pre _cmf_info[cmfv].valid_values[ge] != 0
  * @return the requested bits
  */
-static inline uint GetCompanyManagerFaceBits(CompanyManagerFace cmf, CompanyManagerFaceVariable cmfv, GenderEthnicity ge)
+static inline uint GetCompanyManagerFaceBits(CompanyManagerFace cmf, CompanyManagerFaceVariable cmfv, [[maybe_unused]] GenderEthnicity ge)
 {
 	assert(_cmf_info[cmfv].valid_values[ge] != 0);
 
@@ -108,7 +108,7 @@ static inline uint GetCompanyManagerFaceBits(CompanyManagerFace cmf, CompanyMana
  * @param val  the new value
  * @pre val < _cmf_info[cmfv].valid_values[ge]
  */
-static inline void SetCompanyManagerFaceBits(CompanyManagerFace &cmf, CompanyManagerFaceVariable cmfv, GenderEthnicity ge, uint val)
+static inline void SetCompanyManagerFaceBits(CompanyManagerFace &cmf, CompanyManagerFaceVariable cmfv, [[maybe_unused]] GenderEthnicity ge, uint val)
 {
 	assert(val < _cmf_info[cmfv].valid_values[ge]);
 

src/console_cmds.cpp

@@ -86,7 +86,7 @@ public:
 static ConsoleFileList _console_file_list; ///< File storage cache for the console.
 
 /* console command defines */
-#define DEF_CONSOLE_CMD(function) static bool function(byte argc, char *argv[])
+#define DEF_CONSOLE_CMD(function) static bool function([[maybe_unused]] byte argc, [[maybe_unused]] char *argv[])
 #define DEF_CONSOLE_HOOK(function) static ConsoleHookResult function(bool echo)
 
 

src/console_gui.cpp

@@ -200,7 +200,7 @@ struct IConsoleWindow : Window
 		if (_iconsole_cmdline.HandleCaret()) this->SetDirty();
 	}
 
-	EventState OnKeyPress(char32_t key, uint16_t keycode) override
+	EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
 	{
 		if (_focused_window != this) return ES_NOT_HANDLED;
 
@@ -271,7 +271,7 @@ struct IConsoleWindow : Window
 		return ES_HANDLED;
 	}
 
-	void InsertTextString(int wid, const char *str, bool marked, const char *caret, const char *insert_location, const char *replacement_end) override
+	void InsertTextString(int, const char *str, bool marked, const char *caret, const char *insert_location, const char *replacement_end) override
 	{
 		if (_iconsole_cmdline.InsertString(str, marked, caret, insert_location, replacement_end)) {
 			IConsoleWindow::scroll = 0;
@@ -323,7 +323,7 @@ struct IConsoleWindow : Window
 		VideoDriver::GetInstance()->EditBoxGainedFocus();
 	}
 
-	void OnFocusLost(bool closing) override
+	void OnFocusLost(bool) override
 	{
 		VideoDriver::GetInstance()->EditBoxLostFocus();
 	}

src/core/pool_type.hpp

@@ -275,13 +275,12 @@ struct Pool : PoolBase {
 
 		/**
 		 * Allocates space for new Titem at given memory address
-		 * @param size size of Titem
 		 * @param ptr where are we allocating the item?
 		 * @return pointer to allocated memory (== ptr)
 		 * @note use of this is strongly discouraged
 		 * @pre the memory must not be allocated in the Pool!
 		 */
-		inline void *operator new(size_t size, void *ptr)
+		inline void *operator new(size_t, void *ptr)
 		{
 			for (size_t i = 0; i < Tpool->first_unused; i++) {
 				/* Don't allow creating new objects over existing.
@@ -375,7 +374,7 @@ struct Pool : PoolBase {
 		 * @note when this function is called, PoolItem::Get(index) == nullptr.
 		 * @note it's called only when !CleaningPool()
 		 */
-		static inline void PostDestructor(size_t index) { }
+		static inline void PostDestructor([[maybe_unused]] size_t index) { }
 
 		/**
 		 * Returns an iterable ensemble of all valid Titem

src/cpu.cpp

@@ -155,7 +155,7 @@ void ottd_cpuid(int info[4], int type)
 	}
 }
 #else
-void ottd_cpuid(int info[4], int type)
+void ottd_cpuid(int info[4], int)
 {
 	info[0] = info[1] = info[2] = info[3] = 0;
 }

src/date_gui.cpp

@@ -55,7 +55,7 @@ struct SetDateWindow : Window {
 		this->date.year = Clamp(this->date.year, min_year, max_year);
 	}
 
-	Point OnInitialPosition(int16_t sm_width, int16_t sm_height, int window_number) override
+	Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override
 	{
 		Point pt = { this->parent->left + this->parent->width / 2 - sm_width / 2, this->parent->top + this->parent->height / 2 - sm_height / 2 };
 		return pt;
@@ -99,7 +99,7 @@ struct SetDateWindow : Window {
 		ShowDropDownList(this, std::move(list), selected, widget);
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		Dimension d = {0, 0};
 		switch (widget) {
@@ -137,7 +137,7 @@ struct SetDateWindow : Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_SD_DAY:

src/depot_gui.cpp

@@ -117,11 +117,10 @@ extern void DepotSortList(VehicleList *list);
 
 /**
  * This is the Callback method after the cloning attempt of a vehicle
- * @param cmd unused
  * @param result the result of the cloning command
  * @param veh_id cloned vehicle ID
  */
-void CcCloneVehicle(Commands cmd, const CommandCost &result, VehicleID veh_id)
+void CcCloneVehicle(Commands, const CommandCost &result, VehicleID veh_id)
 {
 	if (result.Failed()) return;
 
@@ -656,7 +655,7 @@ struct DepotWindow : Window {
 		this->flag_size = maxdim(GetScaledSpriteSize(SPR_FLAG_VEH_STOPPED), GetScaledSpriteSize(SPR_FLAG_VEH_RUNNING));
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_D_MATRIX: {
@@ -704,7 +703,7 @@ struct DepotWindow : Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		this->generate_list = true;
 	}
@@ -760,7 +759,7 @@ struct DepotWindow : Window {
 		this->DrawWidgets();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_D_MATRIX: // List
@@ -842,7 +841,7 @@ struct DepotWindow : Window {
 		Command<CMD_RENAME_DEPOT>::Post(STR_ERROR_CAN_T_RENAME_DEPOT, this->GetDepotIndex(), str);
 	}
 
-	bool OnRightClick(Point pt, int widget) override
+	bool OnRightClick([[maybe_unused]] Point pt, int widget) override
 	{
 		if (widget != WID_D_MATRIX) return false;
 

src/disaster_vehicle.cpp

@@ -690,7 +690,7 @@ static bool DisasterTick_Submarine(DisasterVehicle *v)
 }
 
 
-static bool DisasterTick_NULL(DisasterVehicle *v)
+static bool DisasterTick_NULL(DisasterVehicle *)
 {
 	return true;
 }

src/dock_gui.cpp

@@ -45,7 +45,7 @@ static void ShowBuildDocksDepotPicker(Window *parent);
 
 static Axis _ship_depot_direction;
 
-void CcBuildDocks(Commands cmd, const CommandCost &result, TileIndex tile)
+void CcBuildDocks(Commands, const CommandCost &result, TileIndex tile)
 {
 	if (result.Failed()) return;
 
@@ -53,7 +53,7 @@ void CcBuildDocks(Commands cmd, const CommandCost &result, TileIndex tile)
 	if (!_settings_client.gui.persistent_buildingtools) ResetObjectToPlace();
 }
 
-void CcPlaySound_CONSTRUCTION_WATER(Commands cmd, const CommandCost &result, TileIndex tile)
+void CcPlaySound_CONSTRUCTION_WATER(Commands, const CommandCost &result, TileIndex tile)
 {
 	if (result.Succeeded() && _settings_client.sound.confirm) SndPlayTileFx(SND_02_CONSTRUCTION_WATER, tile);
 }
@@ -120,7 +120,7 @@ struct BuildDocksToolbarWindow : Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 
@@ -148,7 +148,7 @@ struct BuildDocksToolbarWindow : Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_DT_CANAL: // Build canal button
@@ -189,7 +189,7 @@ struct BuildDocksToolbarWindow : Window {
 		this->last_clicked_widget = (DockToolbarWidgets)widget;
 	}
 
-	void OnPlaceObject(Point pt, TileIndex tile) override
+	void OnPlaceObject([[maybe_unused]] Point pt, TileIndex tile) override
 	{
 		switch (this->last_clicked_widget) {
 			case WID_DT_CANAL: // Build canal button
@@ -242,12 +242,12 @@ struct BuildDocksToolbarWindow : Window {
 		}
 	}
 
-	void OnPlaceDrag(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt) override
+	void OnPlaceDrag(ViewportPlaceMethod select_method, [[maybe_unused]] ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt) override
 	{
 		VpSelectTilesWithMethod(pt.x, pt.y, select_method);
 	}
 
-	void OnPlaceMouseUp(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt, TileIndex start_tile, TileIndex end_tile) override
+	void OnPlaceMouseUp([[maybe_unused]] ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, [[maybe_unused]] Point pt, TileIndex start_tile, TileIndex end_tile) override
 	{
 		if (pt.x != -1) {
 			switch (select_proc) {
@@ -278,7 +278,7 @@ struct BuildDocksToolbarWindow : Window {
 		CloseWindowByClass(WC_BUILD_BRIDGE);
 	}
 
-	void OnPlacePresize(Point pt, TileIndex tile_from) override
+	void OnPlacePresize([[maybe_unused]] Point pt, TileIndex tile_from) override
 	{
 		TileIndex tile_to = tile_from;
 
@@ -453,7 +453,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case BDSW_LT_OFF:
@@ -468,7 +468,7 @@ public:
 		}
 	}
 
-	void OnRealtimeTick(uint delta_ms) override
+	void OnRealtimeTick([[maybe_unused]] uint delta_ms) override
 	{
 		CheckRedrawStationCoverage(this);
 	}
@@ -525,7 +525,7 @@ public:
 		UpdateDocksDirection();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_BDD_X:
@@ -559,7 +559,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_BDD_X:

src/economy.cpp

@@ -1438,7 +1438,7 @@ struct ReturnCargoAction
 	 */
 	bool operator()(Vehicle *v)
 	{
-		v->cargo.Return(UINT_MAX, &this->st->goods[v->cargo_type].cargo, this->next_hop);
+		v->cargo.Return(UINT_MAX, &this->st->goods[v->cargo_type].cargo, this->next_hop, v->tile);
 		return true;
 	}
 };
@@ -1698,7 +1698,7 @@ static void LoadUnloadVehicle(Vehicle *front)
 					uint new_remaining = v->cargo.RemainingCount() + v->cargo.ActionCount(VehicleCargoList::MTA_DELIVER);
 					if (v->cargo_cap < new_remaining) {
 						/* Return some of the reserved cargo to not overload the vehicle. */
-						v->cargo.Return(new_remaining - v->cargo_cap, &ge->cargo, INVALID_STATION);
+						v->cargo.Return(new_remaining - v->cargo_cap, &ge->cargo, INVALID_STATION, v->tile);
 					}
 
 					/* Keep instead of delivering. This may lead to no cargo being unloaded, so ...*/

src/engine_gui.cpp

@@ -77,7 +77,7 @@ struct EnginePreviewWindow : Window {
 		this->flags |= WF_STICKY;
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_EP_QUESTION) return;
 
@@ -122,7 +122,7 @@ struct EnginePreviewWindow : Window {
 		DrawStringMultiLine(r.left, r.right, y, r.bottom, GetEngineInfoString(engine), TC_FROMSTRING, SA_CENTER);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_EP_YES:
@@ -134,7 +134,7 @@ struct EnginePreviewWindow : Window {
 		}
 	}
 
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 

src/error_gui.cpp

@@ -188,7 +188,7 @@ public:
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_EM_MESSAGE: {
@@ -217,7 +217,7 @@ public:
 		}
 	}
 
-	Point OnInitialPosition(int16_t sm_width, int16_t sm_height, int window_number) override
+	Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override
 	{
 		/* Position (0, 0) given, center the window. */
 		if (this->position.x == 0 && this->position.y == 0) {
@@ -253,7 +253,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		/* If company gets shut down, while displaying an error about it, remove the error message. */
 		if (this->face != INVALID_COMPANY && !Company::IsValidID(this->face)) this->Close();

src/fileio.cpp

@@ -474,7 +474,7 @@ static std::string ExtractString(char *buffer, size_t buffer_length)
 	return StrMakeValid(std::string(buffer, length));
 }
 
-bool TarScanner::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
+bool TarScanner::AddFile(const std::string &filename, size_t, [[maybe_unused]] const std::string &tar_filename)
 {
 	/* No tar within tar. */
 	assert(tar_filename.empty());

src/fios.cpp

@@ -275,10 +275,9 @@ public:
 /**
  * Try to add a fios item set with the given filename.
  * @param filename        the full path to the file to read
- * @param basepath_length amount of characters to chop of before to get a relative filename
  * @return true if the file is added.
  */
-bool FiosFileScanner::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
+bool FiosFileScanner::AddFile(const std::string &filename, size_t, const std::string &)
 {
 	auto sep = filename.rfind('.');
 	if (sep == std::string::npos) return false;
@@ -531,7 +530,7 @@ void FiosGetScenarioList(SaveLoadOperation fop, FileList &file_list)
 	FiosGetFileList(fop, &FiosGetScenarioListCallback, subdir, file_list);
 }
 
-static std::tuple<FiosType, std::string> FiosGetHeightmapListCallback(SaveLoadOperation fop, const std::string &file, const std::string_view ext)
+static std::tuple<FiosType, std::string> FiosGetHeightmapListCallback(SaveLoadOperation, const std::string &file, const std::string_view ext)
 {
 	/* Show heightmap files
 	 * .PNG PNG Based heightmap files
@@ -640,7 +639,7 @@ public:
 		this->scanned = true;
 	}
 
-	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) override
+	bool AddFile(const std::string &filename, size_t, const std::string &) override
 	{
 		FILE *f = FioFOpenFile(filename, "r", SCENARIO_DIR);
 		if (f == nullptr) return false;
@@ -729,7 +728,7 @@ FiosNumberedSaveName::FiosNumberedSaveName(const std::string &prefix) : prefix(p
 	static std::string _prefix; ///< Static as the lambda needs access to it.
 
 	/* Callback for FiosFileScanner. */
-	static FiosGetTypeAndNameProc *proc = [](SaveLoadOperation fop, const std::string &file, const std::string_view ext) {
+	static FiosGetTypeAndNameProc *proc = [](SaveLoadOperation, const std::string &file, const std::string_view ext) {
 		if (StrEqualsIgnoreCase(ext, ".sav") && StrStartsWith(file, _prefix)) return std::tuple(FIOS_TYPE_FILE, std::string{});
 		return std::tuple(FIOS_TYPE_INVALID, std::string{});
 	};

src/fios_gui.cpp

@@ -282,13 +282,13 @@ private:
 	QueryString filter_editbox; ///< Filter editbox;
 	std::vector<FiosItem *> display_list; ///< Filtered display list
 
-	static void SaveGameConfirmationCallback(Window *w, bool confirmed)
+	static void SaveGameConfirmationCallback(Window *, bool confirmed)
 	{
 		/* File name has already been written to _file_to_saveload */
 		if (confirmed) _switch_mode = SM_SAVE_GAME;
 	}
 
-	static void SaveHeightmapConfirmationCallback(Window *w, bool confirmed)
+	static void SaveHeightmapConfirmationCallback(Window *, bool confirmed)
 	{
 		/* File name has already been written to _file_to_saveload */
 		if (confirmed) _switch_mode = SM_SAVE_HEIGHTMAP;
@@ -561,7 +561,7 @@ public:
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_SL_BACKGROUND:
@@ -594,7 +594,7 @@ public:
 		this->DrawWidgets();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_SL_SORT_BYNAME: // Sort save names by name
@@ -716,7 +716,7 @@ public:
 		}
 	}
 
-	void OnMouseOver(Point pt, int widget) override
+	void OnMouseOver([[maybe_unused]] Point pt, int widget) override
 	{
 		if (widget == WID_SL_DRIVES_DIRECTORIES_LIST) {
 			auto it = this->vscroll->GetScrolledItemFromWidget(this->display_list, pt.y, this, WID_SL_DRIVES_DIRECTORIES_LIST, WidgetDimensions::scaled.inset.top);
@@ -735,7 +735,7 @@ public:
 		}
 	}
 
-	EventState OnKeyPress(char32_t key, uint16_t keycode) override
+	EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
 	{
 		if (keycode == WKC_ESC) {
 			this->Close();

src/fontcache.cpp

@@ -204,5 +204,5 @@ bool HasAntialiasedFonts()
 
 #if !defined(_WIN32) && !defined(__APPLE__) && !defined(WITH_FONTCONFIG) && !defined(WITH_COCOA)
 
-bool SetFallbackFont(FontCacheSettings *settings, const std::string &language_isocode, int winlangid, MissingGlyphSearcher *callback) { return false; }
+bool SetFallbackFont(FontCacheSettings *, const std::string &, int, MissingGlyphSearcher *) { return false; }
 #endif /* !defined(_WIN32) && !defined(__APPLE__) && !defined(WITH_FONTCONFIG) && !defined(WITH_COCOA) */

src/fontcache/freetypefontcache.cpp

@@ -63,7 +63,7 @@ FreeTypeFontCache::FreeTypeFontCache(FontSize fs, FT_Face face, int pixels) : Tr
 	this->SetFontSize(fs, face, pixels);
 }
 
-void FreeTypeFontCache::SetFontSize(FontSize fs, FT_Face face, int pixels)
+void FreeTypeFontCache::SetFontSize(FontSize, FT_Face, int pixels)
 {
 	if (pixels == 0) {
 		/* Try to determine a good height based on the minimal height recommended by the font. */

src/fontcache/spritefontcache.h

@@ -23,16 +23,16 @@ private:
 public:
 	SpriteFontCache(FontSize fs);
 	~SpriteFontCache();
-	virtual void SetUnicodeGlyph(char32_t key, SpriteID sprite);
-	virtual void InitializeUnicodeGlyphMap();
-	virtual void ClearFontCache();
-	virtual const Sprite *GetGlyph(GlyphID key);
-	virtual uint GetGlyphWidth(GlyphID key);
-	virtual bool GetDrawGlyphShadow();
-	virtual GlyphID MapCharToGlyph(char32_t key) { assert(IsPrintable(key)); return SPRITE_GLYPH | key; }
-	virtual const void *GetFontTable(uint32_t tag, size_t &length) { length = 0; return nullptr; }
-	virtual std::string GetFontName() { return "sprite"; }
-	virtual bool IsBuiltInFont() { return true; }
+	void SetUnicodeGlyph(char32_t key, SpriteID sprite) override;
+	void InitializeUnicodeGlyphMap() override;
+	void ClearFontCache() override;
+	const Sprite *GetGlyph(GlyphID key) override;
+	uint GetGlyphWidth(GlyphID key) override;
+	bool GetDrawGlyphShadow() override;
+	GlyphID MapCharToGlyph(char32_t key) override { assert(IsPrintable(key)); return SPRITE_GLYPH | key; }
+	const void *GetFontTable(uint32_t, size_t &length) override { length = 0; return nullptr; }
+	std::string GetFontName() override { return "sprite"; }
+	bool IsBuiltInFont() override { return true; }
 };
 
 #endif /* SPRITEFONTCACHE_H */

src/framerate_gui.cpp

@@ -460,7 +460,7 @@ struct FramerateWindow : Window {
 		ResizeWindow(this, 0, (std::max(MIN_ELEMENTS, this->num_displayed) - MIN_ELEMENTS) * FONT_HEIGHT_NORMAL);
 	}
 
-	void OnRealtimeTick(uint delta_ms) override
+	void OnRealtimeTick([[maybe_unused]] uint delta_ms) override
 	{
 		/* Check if the shaded state has changed, switch caption text if it has */
 		if (this->small != this->IsShaded()) {
@@ -540,7 +540,7 @@ struct FramerateWindow : Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_FRW_RATE_GAMELOOP:
@@ -693,7 +693,7 @@ struct FramerateWindow : Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_FRW_TIMES_NAMES:
@@ -780,7 +780,7 @@ struct FrametimeGraphWindow : Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget == WID_FGW_GRAPH) {
 			SetDParam(0, 100);
@@ -883,7 +883,7 @@ struct FrametimeGraphWindow : Window {
 		this->UpdateScale();
 	}};
 
-	void OnRealtimeTick(uint delta_ms) override
+	void OnRealtimeTick([[maybe_unused]] uint delta_ms) override
 	{
 		this->SetDirty();
 	}

src/game/game_gui.cpp

@@ -130,7 +130,7 @@ struct GSConfigWindow : public Window {
 		this->vscroll->SetCount(this->visible_settings.size());
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_GSC_SETTINGS:
@@ -238,7 +238,7 @@ struct GSConfigWindow : public Window {
 		this->DrawWidgets();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (widget >= WID_GSC_TEXTFILE && widget < WID_GSC_TEXTFILE + TFT_CONTENT_END) {
 			if (GameConfig::GetConfig() == nullptr) return;
@@ -367,12 +367,14 @@ struct GSConfigWindow : public Window {
 
 	void OnDropdownSelect(int widget, int index) override
 	{
+		if (widget >= 0) return;
 		assert(this->clicked_dropdown);
 		SetValue(index);
 	}
 
-	void OnDropdownClose(Point pt, int widget, int index, bool instant_close) override
+	void OnDropdownClose(Point, int widget, int, bool) override
 	{
+		if (widget >= 0) return;
 		/* We cannot raise the dropdown button just yet. OnClick needs some hint, whether
 		 * the same dropdown button was clicked again, and then not open the dropdown again.
 		 * So, we only remember that it was closed, and process it on the next OnPaint, which is
@@ -398,7 +400,7 @@ struct GSConfigWindow : public Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 

src/game/game_text.cpp

@@ -121,7 +121,7 @@ struct TranslationWriter : LanguageWriter {
 	{
 	}
 
-	void WriteHeader(const LanguagePackHeader *header)
+	void WriteHeader(const LanguagePackHeader *)
 	{
 		/* We don't use the header. */
 	}
@@ -131,7 +131,7 @@ struct TranslationWriter : LanguageWriter {
 		/* Nothing to do. */
 	}
 
-	void WriteLength(uint length)
+	void WriteLength(uint)
 	{
 		/* We don't write the length. */
 	}
@@ -159,7 +159,7 @@ struct StringNameWriter : HeaderWriter {
 		if (stringid == (int)this->strings.size()) this->strings.emplace_back(name);
 	}
 
-	void Finalise(const StringData &data)
+	void Finalise(const StringData &)
 	{
 		/* Nothing to do. */
 	}
@@ -185,7 +185,7 @@ public:
 		this->FileScanner::Scan(".txt", directory, false);
 	}
 
-	bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename) override
+	bool AddFile(const std::string &filename, size_t, const std::string &) override
 	{
 		if (exclude == filename) return true;
 

src/gamelog.cpp

@@ -168,13 +168,13 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 }
 
 
-/* virtual */ void LoggedChangeMode::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeMode::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &, GamelogActionType)
 {
 	/* Changing landscape, or going from scenario editor to game or back. */
 	fmt::format_to(output_iterator, "New game mode: {} landscape: {}", this->mode, this->landscape);
 }
 
-/* virtual */ void LoggedChangeRevision::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeRevision::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &, GamelogActionType)
 {
 	/* The game was loaded in a diffferent version than before. */
 	fmt::format_to(output_iterator, "Revision text changed to {}, savegame version {}, ",
@@ -189,7 +189,7 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 	fmt::format_to(output_iterator, "modified, _openttd_newgrf_version = 0x{:08x}", this->newgrf);
 }
 
-/* virtual */ void LoggedChangeOldVersion::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeOldVersion::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &, GamelogActionType)
 {
 	/* The game was loaded from before 0.7.0-beta1. */
 	fmt::format_to(output_iterator, "Conversion from ");
@@ -221,13 +221,13 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 	}
 }
 
-/* virtual */ void LoggedChangeSettingChanged::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeSettingChanged::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &, GamelogActionType)
 {
 	/* A setting with the SF_NO_NETWORK flag got changed; these settings usually affect NewGRFs, such as road side or wagon speed limits. */
 	fmt::format_to(output_iterator, "Setting changed: {} : {} -> {}", this->name, this->oldval, this->newval);
 }
 
-/* virtual */ void LoggedChangeGRFAdd::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeGRFAdd::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType)
 {
 	/* A NewGRF got added to the game, either at the start of the game (never an issue), or later on when it could be an issue. */
 	const GRFConfig *gc = FindGRFConfig(this->grfid, FGCM_EXACT, &this->md5sum);
@@ -256,7 +256,7 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 	}
 }
 
-/* virtual */ void LoggedChangeGRFChanged::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeGRFChanged::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType)
 {
 	/* Another version of the same NewGRF got loaded. */
 	const GRFConfig *gc = FindGRFConfig(this->grfid, FGCM_EXACT, &this->md5sum);
@@ -266,7 +266,7 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 	grf_names[this->grfid] = gc;
 }
 
-/* virtual */ void LoggedChangeGRFParameterChanged::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeGRFParameterChanged::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType)
 {
 	/* A parameter of a NewGRF got changed after the game was started. */
 	auto gm = grf_names.find(this->grfid);
@@ -275,7 +275,7 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 	if (gm == grf_names.end()) fmt::format_to(output_iterator, ". Gamelog inconsistency: GrfID was never added!");
 }
 
-/* virtual */ void LoggedChangeGRFMoved::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeGRFMoved::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType)
 {
 	/* The order of NewGRFs got changed, which might cause some other NewGRFs to behave differently. */
 	auto gm = grf_names.find(this->grfid);
@@ -285,7 +285,7 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 	if (gm == grf_names.end()) fmt::format_to(output_iterator, ". Gamelog inconsistency: GrfID was never added!");
 }
 
-/* virtual */ void LoggedChangeGRFBug::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeGRFBug::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType)
 {
 	/* A specific bug in a NewGRF, that could cause wide spread problems, has been noted during the execution of the game. */
 	auto gm = grf_names.find(this->grfid);
@@ -296,7 +296,7 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 	if (gm == grf_names.end()) fmt::format_to(output_iterator, ". Gamelog inconsistency: GrfID was never added!");
 }
 
-/* virtual */ void LoggedChangeEmergencySave::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &grf_names, GamelogActionType action_type)
+/* virtual */ void LoggedChangeEmergencySave::FormatTo(std::back_insert_iterator<std::string> &, GrfIDMapping &, GamelogActionType)
 {
 	/* At one point the savegame was made during the handling of a game crash.
 	 * The generic code already mentioned the emergency savegame, and there is no extra information to log. */

src/genworld_gui.cpp

@@ -520,7 +520,7 @@ struct GenerateLandscapeWindow : public Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		/* Update the climate buttons */
@@ -588,7 +588,7 @@ struct GenerateLandscapeWindow : public Window {
 
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		Dimension d{0, (uint)FONT_HEIGHT_NORMAL};
 		const StringID *strs = nullptr;
@@ -681,7 +681,7 @@ struct GenerateLandscapeWindow : public Window {
 		*size = maxdim(*size, d);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_GL_TEMPERATE:
@@ -1132,7 +1132,7 @@ struct CreateScenarioWindow : public Window
 		this->DrawWidgets();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		StringID str = STR_JUST_INT;
 		switch (widget) {
@@ -1159,7 +1159,7 @@ struct CreateScenarioWindow : public Window
 		*size = maxdim(*size, d);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_CS_TEMPERATE:
@@ -1372,7 +1372,7 @@ static const StringID _generation_class_table[]  = {
 static_assert(lengthof(_generation_class_table) == GWP_CLASS_COUNT);
 
 
-static void AbortGeneratingWorldCallback(Window *w, bool confirmed)
+static void AbortGeneratingWorldCallback(Window *, bool confirmed)
 {
 	if (confirmed) {
 		AbortGeneratingWorld();
@@ -1388,7 +1388,7 @@ struct GenerateProgressWindow : public Window {
 		this->InitNested();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_GP_ABORT:
@@ -1403,7 +1403,7 @@ struct GenerateProgressWindow : public Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_GP_PROGRESS_BAR: {

src/gfx_layout_fallback.cpp

@@ -65,7 +65,7 @@ public:
 		int CountRuns() const override;
 		const ParagraphLayouter::VisualRun &GetVisualRun(int run) const override;
 
-		int GetInternalCharLength(char32_t c) const override { return 1; }
+		int GetInternalCharLength(char32_t) const override { return 1; }
 	};
 
 	const char32_t *buffer_begin; ///< Begin of the buffer.
@@ -96,8 +96,9 @@ public:
  * @param c           The character to add.
  * @return The number of buffer spaces that were used.
  */
-/* static */ size_t FallbackParagraphLayoutFactory::AppendToBuffer(char32_t *buff, const char32_t *buffer_last, char32_t c)
+/* static */ size_t FallbackParagraphLayoutFactory::AppendToBuffer(char32_t *buff, [[maybe_unused]] const char32_t *buffer_last, char32_t c)
 {
+	assert(buff < buffer_last);
 	*buff = c;
 	return 1;
 }
@@ -265,7 +266,7 @@ const ParagraphLayouter::VisualRun &FallbackParagraphLayout::FallbackLine::GetVi
  * @param length The length of the paragraph.
  * @param runs   The font mapping of this paragraph.
  */
-FallbackParagraphLayout::FallbackParagraphLayout(char32_t *buffer, int length, FontMap &runs) : buffer_begin(buffer), buffer(buffer), runs(runs)
+FallbackParagraphLayout::FallbackParagraphLayout(char32_t *buffer, [[maybe_unused]] int length, FontMap &runs) : buffer_begin(buffer), buffer(buffer), runs(runs)
 {
 	assert(runs.rbegin()->first == length);
 }

src/gfx_layout_icu.cpp

@@ -340,13 +340,11 @@ std::vector<ICURun> ItemizeScript(UChar *buff, size_t length, std::vector<ICURun
  *
  * Basically, this always returns the same or more runs than given.
  *
- * @param buff The string to itemize.
- * @param length The length of the string.
  * @param runs_current The current runs.
  * @param font_mapping The font mapping.
  * @return The runs.
  */
-std::vector<ICURun> ItemizeStyle(UChar *buff, size_t length, std::vector<ICURun> &runs_current, FontMap &font_mapping)
+std::vector<ICURun> ItemizeStyle(std::vector<ICURun> &runs_current, FontMap &font_mapping)
 {
 	std::vector<ICURun> runs;
 
@@ -380,7 +378,7 @@ std::vector<ICURun> ItemizeStyle(UChar *buff, size_t length, std::vector<ICURun>
 
 	auto runs = ItemizeBidi(buff, length);
 	runs = ItemizeScript(buff, length, runs);
-	runs = ItemizeStyle(buff, length, runs, font_mapping);
+	runs = ItemizeStyle(runs, font_mapping);
 
 	if (runs.size() == 0) return nullptr;
 
@@ -524,6 +522,7 @@ std::unique_ptr<const ICUParagraphLayout::Line> ICUParagraphLayout::NextLine(int
 
 /* static */ size_t ICUParagraphLayoutFactory::AppendToBuffer(UChar *buff, const UChar *buffer_last, char32_t c)
 {
+	assert(buff < buffer_last);
 	/* Transform from UTF-32 to internal ICU format of UTF-16. */
 	int32_t length = 0;
 	UErrorCode err = U_ZERO_ERROR;

src/goal_gui.cpp

@@ -63,7 +63,7 @@ struct GoalListWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_GOAL_GLOBAL_BUTTON:
@@ -168,7 +168,7 @@ struct GoalListWindow : public Window {
 		return num;
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_GOAL_LIST) return;
 		Dimension d = GetStringBoundingBox(STR_GOALS_NONE);
@@ -269,7 +269,7 @@ struct GoalListWindow : public Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		this->vscroll->SetCount(this->CountLines());
@@ -370,7 +370,7 @@ struct GoalQuestionWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_GQ_BUTTON_1:
@@ -390,7 +390,7 @@ struct GoalQuestionWindow : public Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_GQ_QUESTION) return;
 

src/graph_gui.cpp

@@ -76,7 +76,7 @@ struct GraphLegendWindow : Window {
 		DrawString(tr.left, tr.right, CenterBounds(tr.top, tr.bottom, FONT_HEIGHT_NORMAL), STR_COMPANY_NAME_COMPANY_NUM, HasBit(_legend_excluded_companies, cid) ? TC_BLACK : TC_WHITE);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (!IsInsideMM(widget, WID_GL_FIRST_COMPANY, MAX_COMPANIES + WID_GL_FIRST_COMPANY)) return;
 
@@ -95,7 +95,7 @@ struct GraphLegendWindow : Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		if (Company::IsValidID(data)) return;
@@ -493,7 +493,7 @@ protected:
 	}
 
 public:
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != this->graph_widget) return;
 
@@ -536,12 +536,12 @@ public:
 		DrawGraph(r);
 	}
 
-	virtual OverflowSafeInt64 GetGraphData(const Company *c, int j)
+	virtual OverflowSafeInt64 GetGraphData(const Company *, int)
 	{
 		return INVALID_DATAPOINT;
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		/* Clicked on legend? */
 		if (widget == WID_CV_KEY_BUTTON) ShowGraphLegend();
@@ -557,7 +557,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		this->UpdateStatistics(true);
@@ -782,7 +782,7 @@ struct PerformanceHistoryGraphWindow : BaseGraphWindow {
 		return c->old_economy[j].performance_history;
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (widget == WID_PHG_DETAILED_PERFORMANCE) ShowPerformanceRatingDetail();
 		this->BaseGraphWindow::OnClick(pt, widget, click_count);
@@ -916,7 +916,7 @@ struct PaymentRatesGraphWindow : BaseGraphWindow {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_CPR_MATRIX) {
 			BaseGraphWindow::UpdateWidgetSize(widget, size, padding, fill, resize);
@@ -975,7 +975,7 @@ struct PaymentRatesGraphWindow : BaseGraphWindow {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_CPR_ENABLE_CARGOES:
@@ -1025,7 +1025,7 @@ struct PaymentRatesGraphWindow : BaseGraphWindow {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		this->UpdatePaymentRates();
@@ -1142,7 +1142,7 @@ struct PerformanceRatingDetailWindow : Window {
 	uint score_detail_left;
 	uint score_detail_right;
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_PRD_SCORE_FIRST:
@@ -1279,7 +1279,7 @@ struct PerformanceRatingDetailWindow : Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		/* Check which button is clicked */
 		if (IsInsideMM(widget, WID_PRD_COMPANY_FIRST, WID_PRD_COMPANY_LAST + 1)) {
@@ -1307,7 +1307,7 @@ struct PerformanceRatingDetailWindow : Window {
 	 * @param data the company ID of the company that is going to be removed
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		/* Disable the companies who are not active */

src/group_gui.cpp

@@ -384,7 +384,7 @@ public:
 		*this->sorting = this->vehgroups.GetListing();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_GL_LIST_GROUP:
@@ -442,7 +442,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (data == 0) {
 			/* This needs to be done in command-scope to enforce rebuilding before resorting invalid data */
@@ -651,7 +651,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_GL_SORT_BY_ORDER: // Flip sorting method ascending/descending
@@ -1169,14 +1169,12 @@ static void CcCreateGroup(GroupID gid, VehicleType veh_type)
 
 /**
  * Opens a 'Rename group' window for newly created group.
- * @param cmd Unused.
  * @param result Did command succeed?
  * @param new_group ID of the created group.
  * @param vt Vehicle type.
- * @param parent_group Parent group of the new group.
  * @see CmdCreateGroup
  */
-void CcCreateGroup(Commands cmd, const CommandCost &result, GroupID new_group, VehicleType vt, GroupID parent_group)
+void CcCreateGroup(Commands, const CommandCost &result, GroupID new_group, VehicleType vt, GroupID)
 {
 	if (result.Failed()) return;
 
@@ -1186,12 +1184,10 @@ void CcCreateGroup(Commands cmd, const CommandCost &result, GroupID new_group, V
 
 /**
  * Open rename window after adding a vehicle to a new group via drag and drop.
- * @param cmd Unused.
  * @param result Did command succeed?
  * @param new_group ID of the created group.
- * @param veh_id vehicle to add to a group
  */
-void CcAddVehicleNewGroup(Commands cmd, const CommandCost &result, GroupID new_group, GroupID, VehicleID veh_id, bool, const VehicleListIdentifier &)
+void CcAddVehicleNewGroup(Commands, const CommandCost &result, GroupID new_group, GroupID, VehicleID, bool, const VehicleListIdentifier &)
 {
 	if (result.Failed()) return;
 

src/help_gui.cpp

@@ -129,7 +129,7 @@ struct HelpWindow : public Window {
 		this->EnableTextfileButton(LICENSE_FILENAME, WID_HW_LICENSE);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_HW_README:

src/highscore_gui.cpp

@@ -65,12 +65,12 @@ struct EndGameHighScoreBaseWindow : Window {
 		return pt;
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, [[maybe_unused]] int widget, [[maybe_unused]] int click_count) override
 	{
 		this->Close();
 	}
 
-	EventState OnKeyPress(char32_t key, uint16_t keycode) override
+	EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
 	{
 		/* All keys are 'handled' by this window but we want to make
 		 * sure that 'quit' still works correctly. Not handling the

src/hotkeys.cpp

@@ -348,7 +348,7 @@ void SaveHotkeysToConfig()
 	SaveLoadHotkeys(true);
 }
 
-void HandleGlobalHotkeys(char32_t key, uint16_t keycode)
+void HandleGlobalHotkeys([[maybe_unused]] char32_t key, uint16_t keycode)
 {
 	for (HotkeyList *list : *_hotkey_lists) {
 		if (list->global_hotkey_handler == nullptr) continue;

src/industry_cmd.cpp

@@ -206,7 +206,7 @@ Industry::~Industry()
  * Invalidating some stuff after removing item from the pool.
  * @param index index of deleted item
  */
-void Industry::PostDestructor(size_t index)
+void Industry::PostDestructor(size_t)
 {
 	InvalidateWindowData(WC_INDUSTRY_DIRECTORY, 0, IDIWD_FORCE_REBUILD);
 	SetWindowDirty(WC_BUILD_INDUSTRY, 0);
@@ -385,7 +385,7 @@ static void DrawTile_Industry(TileInfo *ti)
 	}
 }
 
-static int GetSlopePixelZ_Industry(TileIndex tile, uint x, uint y, bool ground_vehicle)
+static int GetSlopePixelZ_Industry(TileIndex tile, uint, uint, bool)
 {
 	return GetTileMaxPixelZ(tile);
 }
@@ -952,7 +952,7 @@ static bool ClickTile_Industry(TileIndex tile)
 	return true;
 }
 
-static TrackStatus GetTileTrackStatus_Industry(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
+static TrackStatus GetTileTrackStatus_Industry(TileIndex, TransportType, uint, DiagDirection)
 {
 	return 0;
 }
@@ -1094,10 +1094,9 @@ void PlantRandomFarmField(const Industry *i)
 /**
  * Search callback function for ChopLumberMillTrees
  * @param tile to test
- * @param user_data that is passed by the caller.  In this case, nothing
  * @return the result of the test
  */
-static bool SearchLumberMillTrees(TileIndex tile, void *user_data)
+static bool SearchLumberMillTrees(TileIndex tile, void *)
 {
 	if (IsTileType(tile, MP_TREES) && GetTreeGrowth(tile) > 2) { ///< 3 and up means all fully grown trees
 		/* found a tree */
@@ -1225,10 +1224,9 @@ void OnTick_Industry()
 
 /**
  * Check the conditions of #CHECK_NOTHING (Always succeeds).
- * @param tile %Tile to perform the checking.
  * @return Succeeded or failed command.
  */
-static CommandCost CheckNewIndustry_NULL(TileIndex tile)
+static CommandCost CheckNewIndustry_NULL(TileIndex)
 {
 	return CommandCost();
 }
@@ -1587,7 +1585,7 @@ static bool CheckCanTerraformSurroundingTiles(TileIndex tile, uint height, int i
  * This function tries to flatten out the land below an industry, without
  *  damaging the surroundings too much.
  */
-static bool CheckIfCanLevelIndustryPlatform(TileIndex tile, DoCommandFlag flags, const IndustryTileLayout &layout, int type)
+static bool CheckIfCanLevelIndustryPlatform(TileIndex tile, DoCommandFlag flags, const IndustryTileLayout &layout)
 {
 	int max_x = 0;
 	int max_y = 0;
@@ -1992,7 +1990,7 @@ static CommandCost CreateNewIndustryHelper(TileIndex tile, IndustryType type, Do
 	if (ret.Failed()) return ret;
 
 	if (!custom_shape_check && _settings_game.game_creation.land_generator == LG_TERRAGENESIS && _generating_world &&
-			!_ignore_restrictions && !CheckIfCanLevelIndustryPlatform(tile, DC_NO_WATER, layout, type)) {
+			!_ignore_restrictions && !CheckIfCanLevelIndustryPlatform(tile, DC_NO_WATER, layout)) {
 		return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
 	}
 
@@ -2000,7 +1998,7 @@ static CommandCost CreateNewIndustryHelper(TileIndex tile, IndustryType type, Do
 
 	if (flags & DC_EXEC) {
 		*ip = new Industry(tile);
-		if (!custom_shape_check) CheckIfCanLevelIndustryPlatform(tile, DC_NO_WATER | DC_EXEC, layout, type);
+		if (!custom_shape_check) CheckIfCanLevelIndustryPlatform(tile, DC_NO_WATER | DC_EXEC, layout);
 		DoCreateNewIndustry(*ip, tile, type, layout, layout_index, t, founder, random_initial_bits);
 	}
 

src/industry_gui.cpp

@@ -243,12 +243,11 @@ void SortIndustryTypes()
 
 /**
  * Command callback. In case of failure to build an industry, show an error message.
- * @param cmd    Unused.
  * @param result Result of the command.
  * @param tile   Tile where the industry is placed.
  * @param indtype Industry type.
  */
-void CcBuildIndustry(Commands cmd, const CommandCost &result, TileIndex tile, IndustryType indtype, uint32_t, bool, uint32_t)
+void CcBuildIndustry(Commands, const CommandCost &result, TileIndex tile, IndustryType indtype, uint32_t, bool, uint32_t)
 {
 	if (result.Succeeded()) return;
 
@@ -425,7 +424,7 @@ public:
 		this->SetupArrays();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_DPI_MATRIX_WIDGET: {
@@ -598,7 +597,7 @@ public:
 		}
 	}
 
-	static void AskManyRandomIndustriesCallback(Window *w, bool confirmed)
+	static void AskManyRandomIndustriesCallback(Window *, bool confirmed)
 	{
 		if (!confirmed) return;
 
@@ -613,7 +612,7 @@ public:
 		}
 	}
 
-	static void AskRemoveAllIndustriesCallback(Window *w, bool confirmed)
+	static void AskRemoveAllIndustriesCallback(Window *, bool confirmed)
 	{
 		if (!confirmed) return;
 
@@ -629,7 +628,7 @@ public:
 		MarkWholeScreenDirty();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_DPI_CREATE_RANDOM_INDUSTRIES_WIDGET: {
@@ -693,7 +692,7 @@ public:
 		this->vscroll->SetCapacityFromWidget(this, WID_DPI_MATRIX_WIDGET);
 	}
 
-	void OnPlaceObject(Point pt, TileIndex tile) override
+	void OnPlaceObject([[maybe_unused]] Point pt, TileIndex tile) override
 	{
 		bool success = true;
 		/* We do not need to protect ourselves against "Random Many Industries" in this mode */
@@ -753,7 +752,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		this->SetupArrays();
@@ -989,12 +988,12 @@ public:
 		if (widget == WID_IV_CAPTION) SetDParam(0, this->window_number);
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget == WID_IV_INFO) size->height = this->info_height;
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_IV_INFO: {
@@ -1142,7 +1141,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		const Industry *i = Industry::Get(this->window_number);
@@ -1617,7 +1616,7 @@ protected:
 	}
 
 public:
-	IndustryDirectoryWindow(WindowDesc *desc, WindowNumber number) : Window(desc), industry_editbox(MAX_FILTER_LENGTH * MAX_CHAR_LENGTH, MAX_FILTER_LENGTH)
+	IndustryDirectoryWindow(WindowDesc *desc, WindowNumber) : Window(desc), industry_editbox(MAX_FILTER_LENGTH * MAX_CHAR_LENGTH, MAX_FILTER_LENGTH)
 	{
 		this->CreateNestedTree();
 		this->vscroll = this->GetScrollbar(WID_ID_SCROLLBAR);
@@ -1694,7 +1693,7 @@ public:
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_ID_DROPDOWN_ORDER: {
@@ -1732,7 +1731,7 @@ public:
 	}
 
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_ID_DROPDOWN_ORDER:
@@ -1821,7 +1820,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		switch (data) {
 			case IDIWD_FORCE_REBUILD:
@@ -2586,7 +2585,7 @@ struct IndustryCargoesWindow : public Window {
 		CargoesField::cargo_field_width = CargoesField::cargo_border.width * 2 + CargoesField::cargo_line.width * CargoesField::max_cargoes + CargoesField::cargo_space.width * (CargoesField::max_cargoes - 1);
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_IC_PANEL:
@@ -2924,7 +2923,7 @@ struct IndustryCargoesWindow : public Window {
 	 * - data = NUM_INDUSTRYTYPES: Stop sending updates to the smallmap window.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		if (data == NUM_INDUSTRYTYPES) {
@@ -3021,7 +3020,7 @@ struct IndustryCargoesWindow : public Window {
 		return true;
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_IC_PANEL: {
@@ -3108,7 +3107,7 @@ struct IndustryCargoesWindow : public Window {
 		}
 	}
 
-	bool OnTooltip(Point pt, int widget, TooltipCloseCondition close_cond) override
+	bool OnTooltip([[maybe_unused]] Point pt, int widget, TooltipCloseCondition close_cond) override
 	{
 		if (widget != WID_IC_PANEL) return false;
 

src/intro_gui.cpp

@@ -190,7 +190,7 @@ struct SelectGameWindow : public Window {
 		this->mouse_idle_pos = _cursor.pos;
 	}
 
-	void OnRealtimeTick(uint delta_ms) override
+	void OnRealtimeTick([[maybe_unused]] uint delta_ms) override
 	{
 		/* Move the main game viewport according to intro viewport commands. */
 
@@ -264,7 +264,7 @@ struct SelectGameWindow : public Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		this->SetWidgetLoweredState(WID_SGI_TEMPERATE_LANDSCAPE, _settings_newgame.game_creation.landscape == LT_TEMPERATE);
@@ -297,7 +297,7 @@ struct SelectGameWindow : public Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		StringID str = 0;
 		switch (widget) {
@@ -326,7 +326,7 @@ struct SelectGameWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		/* Do not create a network server when you (just) have closed one of the game
 		 * creation/load windows for the network server. */
@@ -507,7 +507,7 @@ void ShowSelectGameWindow()
 	new SelectGameWindow(&_select_game_desc);
 }
 
-static void AskExitGameCallback(Window *w, bool confirmed)
+static void AskExitGameCallback(Window *, bool confirmed)
 {
 	if (confirmed) {
 		_survey.Transmit(NetworkSurveyHandler::Reason::EXIT, true);
@@ -527,7 +527,7 @@ void AskExitGame()
 }
 
 
-static void AskExitToGameMenuCallback(Window *w, bool confirmed)
+static void AskExitToGameMenuCallback(Window *, bool confirmed)
 {
 	if (confirmed) {
 		_switch_mode = SM_MENU;

src/landscape.cpp

@@ -978,10 +978,9 @@ static void CreateDesertOrRainForest(uint desert_tropic_line)
 /**
  * Find the spring of a river.
  * @param tile The tile to consider for being the spring.
- * @param user_data Ignored data.
  * @return True iff it is suitable as a spring.
  */
-static bool FindSpring(TileIndex tile, void *user_data)
+static bool FindSpring(TileIndex tile, void *)
 {
 	int referenceHeight;
 	if (!IsTileFlat(tile, &referenceHeight) || IsWaterTile(tile)) return false;
@@ -1216,13 +1215,13 @@ static int32_t River_EndNodeCheck(const AyStar *aystar, const OpenListNode *curr
 }
 
 /* AyStar callback for getting the cost of the current node. */
-static int32_t River_CalculateG(AyStar *aystar, AyStarNode *current, OpenListNode *parent)
+static int32_t River_CalculateG(AyStar *, AyStarNode *, OpenListNode *)
 {
 	return 1 + RandomRange(_settings_game.game_creation.river_route_random);
 }
 
 /* AyStar callback for getting the estimated cost to the destination. */
-static int32_t River_CalculateH(AyStar *aystar, AyStarNode *current, OpenListNode *parent)
+static int32_t River_CalculateH(AyStar *aystar, AyStarNode *current, OpenListNode *)
 {
 	return DistanceManhattan(*(TileIndex*)aystar->user_target, current->tile);
 }
@@ -1283,10 +1282,9 @@ static const uint RIVER_HASH_SIZE = 8; ///< The number of bits the hash for rive
 /**
  * Simple hash function for river tiles to be used by AyStar.
  * @param tile The tile to hash.
- * @param dir The unused direction.
  * @return The hash for the tile.
  */
-static uint River_Hash(TileIndex tile, Trackdir dir)
+static uint River_Hash(TileIndex tile, Trackdir)
 {
 	return GB(TileHash(TileX(tile), TileY(tile)), 0, RIVER_HASH_SIZE);
 }

src/lang/korean.txt

@@ -930,7 +930,7 @@ STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO               :{WHITE}{STATION
 STR_NEWS_STATION_NOW_ACCEPTS_CARGO                              :{WHITE}{STATION}에서 이제 {STRING}{G 1 "을" "를"} 받을 수 있습니다.
 STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO                    :{WHITE}{STATION}에서 이제 {STRING}/{STRING}{G 2 "을" "를"} 받을 수 있습니다.
 
-STR_NEWS_OFFER_OF_SUBSIDY_EXPIRED                               :{BIG_FONT}{BLACK}보조금 지급 계약 파기:{}{}{1:STRING}에서 {2:STRING}까지의 {0:STRING} 수송은{}더 이상 보조금을 지급하지 않습니다.
+STR_NEWS_OFFER_OF_SUBSIDY_EXPIRED                               :{BIG_FONT}{BLACK}보조금 지급 종료:{}{}{1:STRING}에서 {2:STRING}까지의 {0:STRING} 수송은{}더 이상 보조금을 지급하지 않습니다.
 STR_NEWS_SUBSIDY_WITHDRAWN_SERVICE                              :{BIG_FONT}{BLACK}보조금 지급 만료:{}{}{1:STRING}에서 {2:STRING}까지의{}{0:STRING} 수송 보조금은 더 이상 지급되지 않습니다.
 STR_NEWS_SERVICE_SUBSIDY_OFFERED                                :{BIG_FONT}{BLACK}보조금 지급 안내{}{}처음으로 {1:STRING}에서 {2:STRING}까지{}{0:STRING}{G 0 "을" "를"} 수송하는 회사는{}지역 당국으로부터 {3:NUM}년 동안 보조금을 받게 될 것입니다!
 ###length 4

src/league_gui.cpp

@@ -127,7 +127,7 @@ public:
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_PLT_BACKGROUND) return;
 
@@ -175,7 +175,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (data == 0) {
 			/* This needs to be done in command-scope to enforce rebuilding before resorting invalid data */
@@ -354,7 +354,7 @@ public:
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_SLT_BACKGROUND) return;
 
@@ -394,7 +394,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (widget != WID_SLT_BACKGROUND) return;
 
@@ -411,7 +411,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		this->BuildTable();
 		this->ReInit();

src/linkgraph/linkgraph_gui.cpp

@@ -580,7 +580,7 @@ void LinkGraphLegendWindow::SetOverlay(std::shared_ptr<LinkGraphOverlay> overlay
 	}
 }
 
-void LinkGraphLegendWindow::UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
+void LinkGraphLegendWindow::UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize)
 {
 	if (IsInsideMM(widget, WID_LGL_SATURATION_FIRST, WID_LGL_SATURATION_LAST + 1)) {
 		StringID str = STR_NULL;
@@ -639,7 +639,7 @@ void LinkGraphLegendWindow::DrawWidget(const Rect &r, int widget) const
 	}
 }
 
-bool LinkGraphLegendWindow::OnTooltip(Point pt, int widget, TooltipCloseCondition close_cond)
+bool LinkGraphLegendWindow::OnTooltip([[maybe_unused]] Point, int widget, TooltipCloseCondition close_cond)
 {
 	if (IsInsideMM(widget, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST + 1)) {
 		if (this->IsWidgetDisabled(widget)) {
@@ -686,7 +686,7 @@ void LinkGraphLegendWindow::UpdateOverlayCargoes()
 	this->overlay->SetCargoMask(mask);
 }
 
-void LinkGraphLegendWindow::OnClick(Point pt, int widget, int click_count)
+void LinkGraphLegendWindow::OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count)
 {
 	/* Check which button is clicked */
 	if (IsInsideMM(widget, WID_LGL_COMPANY_FIRST, WID_LGL_COMPANY_LAST + 1)) {
@@ -718,7 +718,7 @@ void LinkGraphLegendWindow::OnClick(Point pt, int widget, int click_count)
  * @param data ignored
  * @param gui_scope ignored
  */
-void LinkGraphLegendWindow::OnInvalidateData(int data, bool gui_scope)
+void LinkGraphLegendWindow::OnInvalidateData([[maybe_unused]] int data, [[maybe_unused]] bool gui_scope)
 {
 	if (this->num_cargo != _sorted_cargo_specs.size()) {
 		this->Close();

src/linkgraph/linkgraph_gui.h

@@ -108,10 +108,10 @@ public:
 	LinkGraphLegendWindow(WindowDesc *desc, int window_number);
 	void SetOverlay(std::shared_ptr<LinkGraphOverlay> overlay);
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override;
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override;
 	void DrawWidget(const Rect &r, int widget) const override;
-	bool OnTooltip(Point pt, int widget, TooltipCloseCondition close_cond) override;
-	void OnClick(Point pt, int widget, int click_count) override;
+	bool OnTooltip([[maybe_unused]] Point pt, int widget, TooltipCloseCondition close_cond) override;
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override;
 	void OnInvalidateData(int data = 0, bool gui_scope = true) override;
 
 private:

src/linkgraph/mcf.cpp

@@ -108,10 +108,9 @@ public:
 
 	/**
 	 * Setup the node to start iterating at.
-	 * @param source Unused.
 	 * @param node Node to start iterating at.
 	 */
-	void SetNode(NodeID source, NodeID node)
+	void SetNode(NodeID, NodeID node)
 	{
 		this->i = this->job[node].edges.cbegin();
 		this->end = this->job[node].edges.cend();
@@ -197,7 +196,7 @@ public:
  * @return True if base + the new edge would be better than the path associated
  * with this annotation.
  */
-bool DistanceAnnotation::IsBetter(const DistanceAnnotation *base, uint cap,
+bool DistanceAnnotation::IsBetter(const DistanceAnnotation *base, uint,
 		int free_cap, uint dist) const
 {
 	/* If any of the paths is disconnected, the other one is better. If both

src/main_gui.cpp

@@ -78,7 +78,7 @@ bool HandlePlacePushButton(Window *w, int widget, CursorID cursor, HighLightStyl
 }
 
 
-void CcPlaySound_EXPLOSION(Commands cmd, const CommandCost &result, TileIndex tile)
+void CcPlaySound_EXPLOSION(Commands, const CommandCost &result, TileIndex tile)
 {
 	if (result.Succeeded() && _settings_client.sound.confirm) SndPlayTileFx(SND_12_EXPLOSION, tile);
 }
@@ -443,7 +443,7 @@ struct MainWindow : Window
 		}
 	}
 
-	bool OnTooltip(Point pt, int widget, TooltipCloseCondition close_cond) override
+	bool OnTooltip([[maybe_unused]] Point pt, int widget, TooltipCloseCondition close_cond) override
 	{
 		if (widget != WID_M_VIEWPORT) return false;
 		return this->viewport->overlay->ShowTooltip(pt, close_cond);
@@ -454,7 +454,7 @@ struct MainWindow : Window
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		/* Forward the message to the appropriate toolbar (ingame or scenario editor) */

src/misc_cmd.cpp

@@ -121,10 +121,9 @@ CommandCost CmdDecreaseLoan(DoCommandFlag flags, LoanCommand cmd, Money amount)
 /**
  * In case of an unsafe unpause, we want the
  * user to confirm that it might crash.
- * @param w         unused
  * @param confirmed whether the user confirmed their action
  */
-static void AskUnsafeUnpauseCallback(Window *w, bool confirmed)
+static void AskUnsafeUnpauseCallback(Window *, bool confirmed)
 {
 	if (confirmed) {
 		Command<CMD_PAUSE>::Post(PM_PAUSED_ERROR, false);
@@ -191,11 +190,10 @@ CommandCost CmdPause(DoCommandFlag flags, PauseMode mode, bool pause)
 
 /**
  * Change the financial flow of your company.
- * @param flags operation to perform
  * @param amount the amount of money to receive (if positive), or spend (if negative)
  * @return the cost of this operation or an error
  */
-CommandCost CmdMoneyCheat(DoCommandFlag flags, Money amount)
+CommandCost CmdMoneyCheat(DoCommandFlag, Money amount)
 {
 	return CommandCost(EXPENSES_OTHER, -amount);
 }

src/misc_gui.cpp

@@ -88,7 +88,7 @@ public:
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_LI_BACKGROUND) return;
 
@@ -339,7 +339,7 @@ public:
 		::ShowNewGRFInspectWindow(GetGrfSpecFeature(this->tile), static_cast<uint32_t>(this->tile));
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_LI_LOCATION:
@@ -357,7 +357,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 
@@ -483,7 +483,7 @@ struct AboutWindow : public Window {
 		if (widget == WID_A_COPYRIGHT) SetDParamStr(0, _openttd_revision_year);
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_A_SCROLLING_TEXT) return;
 
@@ -676,7 +676,7 @@ struct TooltipsWindow : public Window
 		CLRBITS(this->flags, WF_WHITE_BORDER);
 	}
 
-	Point OnInitialPosition(int16_t sm_width, int16_t sm_height, int window_number) override
+	Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override
 	{
 		/* Find the free screen space between the main toolbar at the top, and the statusbar at the bottom.
 		 * Add a fixed distance 2 so the tooltip floats free from both bars.
@@ -696,9 +696,9 @@ struct TooltipsWindow : public Window
 		return pt;
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
-		/* There is only one widget. */
+		if (widget != WID_TT_BACKGROUND) return;
 		CopyInDParam(this->params);
 
 		size->width  = std::min<uint>(GetStringBoundingBox(this->string_id).width, ScaleGUITrad(194));
@@ -711,7 +711,7 @@ struct TooltipsWindow : public Window
 
 	void DrawWidget(const Rect &r, int widget) const override
 	{
-		/* There is only one widget. */
+		if (widget != WID_TT_BACKGROUND) return;
 		GfxFillRect(r, PC_BLACK);
 		GfxFillRect(r.Shrink(WidgetDimensions::scaled.bevel), PC_LIGHT_YELLOW);
 
@@ -980,7 +980,7 @@ struct QueryStringWindow : public Window
 		this->ReInit();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget == WID_QS_DEFAULT && (this->flags & QSF_ENABLE_DEFAULT) == 0) {
 			/* We don't want this widget to show! */
@@ -1019,7 +1019,7 @@ struct QueryStringWindow : public Window
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_QS_DEFAULT:
@@ -1115,7 +1115,7 @@ struct QueryWindow : public Window {
 		this->Window::Close();
 	}
 
-	void FindWindowPlacementAndResize(int def_width, int def_height) override
+	void FindWindowPlacementAndResize([[maybe_unused]] int def_width, [[maybe_unused]] int def_height) override
 	{
 		/* Position query window over the calling window, ensuring it's within screen bounds. */
 		this->left = SoftClamp(parent->left + (parent->width / 2) - (this->width / 2), 0, _screen.width - this->width);
@@ -1133,7 +1133,7 @@ struct QueryWindow : public Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget != WID_Q_TEXT) return;
 
@@ -1151,7 +1151,7 @@ struct QueryWindow : public Window {
 				this->message, TC_FROMSTRING, SA_CENTER);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_Q_YES: {
@@ -1174,7 +1174,7 @@ struct QueryWindow : public Window {
 		}
 	}
 
-	EventState OnKeyPress(char32_t key, uint16_t keycode) override
+	EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
 	{
 		/* ESC closes the window, Enter confirms the action */
 		switch (keycode) {

src/music/allegro_m.cpp

@@ -26,7 +26,7 @@ static MIDI *_midi = nullptr;
  */
 extern int _allegro_instance_count;
 
-const char *MusicDriver_Allegro::Start(const StringList &param)
+const char *MusicDriver_Allegro::Start(const StringList &)
 {
 	if (_allegro_instance_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, nullptr)) {
 		Debug(driver, 0, "allegro: install_allegro failed '{}'", allegro_error);

src/music/cocoa_m.cpp

@@ -79,7 +79,7 @@ static void DoSetVolume()
 /**
  * Initialized the MIDI player, including QuickTime initialization.
  */
-const char *MusicDriver_Cocoa::Start(const StringList &parm)
+const char *MusicDriver_Cocoa::Start(const StringList &)
 {
 	if (NewMusicPlayer(&_player) != noErr) return "failed to create music player";
 

src/music/dmusic.cpp

@@ -565,19 +565,19 @@ static void TransmitStandardSysex(IDirectMusicBuffer *buffer, REFERENCE_TIME rt,
 static void TransmitNotesOff(IDirectMusicBuffer *buffer, REFERENCE_TIME block_time, REFERENCE_TIME cur_time)
 {
 	for (int ch = 0; ch < 16; ch++) {
-		TransmitChannelMsg(_buffer, block_time + 10, MIDIST_CONTROLLER | ch, MIDICT_MODE_ALLNOTESOFF, 0);
-		TransmitChannelMsg(_buffer, block_time + 10, MIDIST_CONTROLLER | ch, MIDICT_SUSTAINSW, 0);
-		TransmitChannelMsg(_buffer, block_time + 10, MIDIST_CONTROLLER | ch, MIDICT_MODE_RESETALLCTRL, 0);
+		TransmitChannelMsg(buffer, block_time + 10, MIDIST_CONTROLLER | ch, MIDICT_MODE_ALLNOTESOFF, 0);
+		TransmitChannelMsg(buffer, block_time + 10, MIDIST_CONTROLLER | ch, MIDICT_SUSTAINSW, 0);
+		TransmitChannelMsg(buffer, block_time + 10, MIDIST_CONTROLLER | ch, MIDICT_MODE_RESETALLCTRL, 0);
 	}
 
 	/* Performing a GM reset stops all sound and resets all parameters. */
-	TransmitStandardSysex(_buffer, block_time + 20, MidiSysexMessage::ResetGM);
-	TransmitStandardSysex(_buffer, block_time + 30, MidiSysexMessage::RolandSetReverb);
+	TransmitStandardSysex(buffer, block_time + 20, MidiSysexMessage::ResetGM);
+	TransmitStandardSysex(buffer, block_time + 30, MidiSysexMessage::RolandSetReverb);
 
 	/* Explicitly flush buffer to make sure the messages are processed,
 	 * as we want sound to stop immediately. */
-	_port->PlayBuffer(_buffer);
-	_buffer->Flush();
+	_port->PlayBuffer(buffer);
+	buffer->Flush();
 
 	/* Wait until message time has passed. */
 	Sleep(Clamp((block_time - cur_time) / MS_TO_REFTIME, 5, 1000));

src/music/extmidi.cpp

@@ -95,7 +95,7 @@ bool MusicDriver_ExtMidi::IsSongPlaying()
 	return this->pid != -1;
 }
 
-void MusicDriver_ExtMidi::SetVolume(byte vol)
+void MusicDriver_ExtMidi::SetVolume(byte)
 {
 	Debug(driver, 1, "extmidi: set volume not implemented");
 }

src/music/null_m.h

@@ -15,17 +15,17 @@
 /** The music player that does nothing. */
 class MusicDriver_Null : public MusicDriver {
 public:
-	const char *Start(const StringList &param) override { return nullptr; }
+	const char *Start(const StringList &) override { return nullptr; }
 
 	void Stop() override { }
 
-	void PlaySong(const MusicSongInfo &song) override { }
+	void PlaySong(const MusicSongInfo &) override { }
 
 	void StopSong() override { }
 
 	bool IsSongPlaying() override { return true; }
 
-	void SetVolume(byte vol) override { }
+	void SetVolume(byte) override { }
 	const char *GetName() const override { return "null"; }
 };
 

src/music/win32_m.cpp

@@ -59,7 +59,7 @@ static byte ScaleVolume(byte original, byte scale)
 }
 
 
-void CALLBACK MidiOutProc(HMIDIOUT hmo, UINT wMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2)
+void CALLBACK MidiOutProc(HMIDIOUT hmo, UINT wMsg, DWORD_PTR, DWORD_PTR dwParam1, DWORD_PTR)
 {
 	if (wMsg == MOM_DONE) {
 		MIDIHDR *hdr = (LPMIDIHDR)dwParam1;
@@ -108,7 +108,7 @@ static void TransmitStandardSysex(MidiSysexMessage msg)
  * Realtime MIDI playback service routine.
  * This is called by the multimedia timer.
  */
-void CALLBACK TimerCallback(UINT uTimerID, UINT, DWORD_PTR dwUser, DWORD_PTR, DWORD_PTR)
+void CALLBACK TimerCallback(UINT uTimerID, UINT, DWORD_PTR, DWORD_PTR, DWORD_PTR)
 {
 	/* Ensure only one timer callback is running at once, and prevent races on status flags */
 	std::unique_lock<std::mutex> mutex_lock(_midi.lock, std::defer_lock);

src/music_gui.cpp

@@ -477,7 +477,7 @@ struct MusicTrackSelectionWindow : public Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		for (int i = 0; i < 6; i++) {
@@ -492,7 +492,7 @@ struct MusicTrackSelectionWindow : public Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_MTS_PLAYLIST: {
@@ -560,7 +560,7 @@ struct MusicTrackSelectionWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_MTS_LIST_LEFT: { // add to playlist
@@ -674,7 +674,7 @@ struct MusicWindow : public Window {
 			);
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			/* Make sure that WID_M_SHUFFLE and WID_M_PROGRAMME have the same size.
@@ -763,7 +763,7 @@ struct MusicWindow : public Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		for (int i = 0; i < 6; i++) {
@@ -779,7 +779,7 @@ struct MusicWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_M_PREV: // skip to prev

src/network/core/address.cpp

@@ -98,10 +98,9 @@ std::string NetworkAddress::GetAddressAsString(bool with_family)
 
 /**
  * Helper function to resolve without opening a socket.
- * @param runp information about the socket to try not
  * @return the opened socket or INVALID_SOCKET
  */
-static SOCKET ResolveLoopProc(addrinfo *runp)
+static SOCKET ResolveLoopProc(addrinfo *)
 {
 	/* We just want the first 'entry', so return a valid socket. */
 	return !INVALID_SOCKET;

src/network/core/http_curl.cpp

@@ -174,7 +174,7 @@ void HttpThread()
 		 * up to a second before this callback is called. There is little we can
 		 * do about this. */
 		curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
-		curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, +[](void *userdata, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) -> int {
+		curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, +[](void *userdata, curl_off_t /*dltotal*/, curl_off_t /*dlnow*/, curl_off_t /*ultotal*/, curl_off_t /*ulnow*/) -> int {
 			const HTTPCallback *callback = static_cast<HTTPCallback *>(userdata);
 			return (callback->IsCancelled() || _http_thread_exit) ? 1 : 0;
 		});

src/network/core/http_none.cpp

@@ -18,7 +18,7 @@
 
 #include "../../safeguards.h"
 
-/* static */ void NetworkHTTPSocketHandler::Connect(const std::string &uri, HTTPCallback *callback, const std::string data)
+/* static */ void NetworkHTTPSocketHandler::Connect(const std::string &, HTTPCallback *callback, const std::string)
 {
 	/* No valid HTTP backend was compiled in, so we fail all HTTP requests. */
 	callback->OnFailure();

src/network/core/http_winhttp.cpp

@@ -186,7 +186,7 @@ void NetworkHTTPRequest::WinHttpCallback(DWORD code, void *info, DWORD length)
 	}
 }
 
-static void CALLBACK StaticWinHttpCallback(HINTERNET handle, DWORD_PTR context, DWORD code, void *info, DWORD length)
+static void CALLBACK StaticWinHttpCallback(HINTERNET, DWORD_PTR context, DWORD code, void *info, DWORD length)
 {
 	if (context == 0) return;
 

src/network/core/os_abstraction.cpp

@@ -129,7 +129,7 @@ bool NetworkError::HasError() const
  * @param d The socket to set the non-blocking more for.
  * @return True if setting the non-blocking mode succeeded, otherwise false.
  */
-bool SetNonBlocking(SOCKET d)
+bool SetNonBlocking([[maybe_unused]] SOCKET d)
 {
 #if defined(_WIN32)
 	u_long nonblocking = 1;
@@ -147,7 +147,7 @@ bool SetNonBlocking(SOCKET d)
  * @param d The socket to disable the delaying for.
  * @return True if disabling the delaying succeeded, otherwise false.
  */
-bool SetNoDelay(SOCKET d)
+bool SetNoDelay([[maybe_unused]] SOCKET d)
 {
 #ifdef __EMSCRIPTEN__
 	return true;

src/network/core/tcp.cpp

@@ -62,7 +62,7 @@ void NetworkTCPSocketHandler::CloseSocket()
  * @param error Whether we quit under an error condition or not.
  * @return new status of the connection.
  */
-NetworkRecvStatus NetworkTCPSocketHandler::CloseConnection(bool error)
+NetworkRecvStatus NetworkTCPSocketHandler::CloseConnection([[maybe_unused]] bool error)
 {
 	this->MarkClosed();
 	this->writable = false;

src/network/core/tcp.h

@@ -121,7 +121,7 @@ public:
 	 * Callback when the connection succeeded.
 	 * @param s the socket that we opened
 	 */
-	virtual void OnConnect(SOCKET s) {}
+	virtual void OnConnect([[maybe_unused]] SOCKET s) {}
 
 	/**
 	 * Callback for when the connection attempt failed.

src/network/core/tcp_admin.cpp

@@ -32,7 +32,7 @@ NetworkAdminSocketHandler::NetworkAdminSocketHandler(SOCKET s) : status(ADMIN_ST
 	this->sock = s;
 }
 
-NetworkRecvStatus NetworkAdminSocketHandler::CloseConnection(bool error)
+NetworkRecvStatus NetworkAdminSocketHandler::CloseConnection(bool)
 {
 	delete this;
 	return NETWORK_RECV_STATUS_CLIENT_QUIT;
@@ -129,40 +129,40 @@ NetworkRecvStatus NetworkAdminSocketHandler::ReceiveInvalidPacket(PacketAdminTyp
 	return NETWORK_RECV_STATUS_MALFORMED_PACKET;
 }
 
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_JOIN(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_JOIN); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_QUIT(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_QUIT); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_UPDATE_FREQUENCY(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_UPDATE_FREQUENCY); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_POLL(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_POLL); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_CHAT(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_CHAT); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_EXTERNAL_CHAT(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_EXTERNAL_CHAT); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_RCON(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_RCON); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_GAMESCRIPT(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_GAMESCRIPT); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_PING(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_PING); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_JOIN(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_JOIN); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_QUIT(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_QUIT); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_UPDATE_FREQUENCY(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_UPDATE_FREQUENCY); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_POLL(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_POLL); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_CHAT(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_CHAT); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_EXTERNAL_CHAT(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_EXTERNAL_CHAT); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_RCON(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_RCON); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_GAMESCRIPT(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_GAMESCRIPT); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_ADMIN_PING(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_ADMIN_PING); }
 
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_FULL(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_FULL); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_BANNED(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_BANNED); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_ERROR(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_ERROR); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_PROTOCOL(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_PROTOCOL); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_WELCOME(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_WELCOME); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_NEWGAME(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_NEWGAME); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_SHUTDOWN(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_SHUTDOWN); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_FULL(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_FULL); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_BANNED(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_BANNED); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_ERROR(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_ERROR); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_PROTOCOL(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_PROTOCOL); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_WELCOME(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_WELCOME); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_NEWGAME(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_NEWGAME); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_SHUTDOWN(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_SHUTDOWN); }
 
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_DATE(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_DATE); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_JOIN(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_JOIN); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_INFO(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_INFO); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_UPDATE(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_UPDATE); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_QUIT(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_QUIT); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_ERROR(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_ERROR); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_NEW(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_NEW); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_INFO(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_INFO); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_UPDATE(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_UPDATE); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_REMOVE(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_REMOVE); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_ECONOMY(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_ECONOMY); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_STATS(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_STATS); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CHAT(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CHAT); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_RCON(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_RCON); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CONSOLE(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CONSOLE); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CMD_NAMES(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CMD_NAMES); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CMD_LOGGING(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CMD_LOGGING); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_RCON_END(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_RCON_END); }
-NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_PONG(Packet *p) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_PONG); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_DATE(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_DATE); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_JOIN(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_JOIN); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_INFO(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_INFO); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_UPDATE(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_UPDATE); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_QUIT(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_QUIT); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CLIENT_ERROR(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CLIENT_ERROR); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_NEW(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_NEW); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_INFO(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_INFO); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_UPDATE(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_UPDATE); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_REMOVE(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_REMOVE); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_ECONOMY(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_ECONOMY); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_COMPANY_STATS(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_COMPANY_STATS); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CHAT(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CHAT); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_RCON(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_RCON); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CONSOLE(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CONSOLE); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CMD_NAMES(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CMD_NAMES); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_CMD_LOGGING(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_CMD_LOGGING); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_RCON_END(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_RCON_END); }
+NetworkRecvStatus NetworkAdminSocketHandler::Receive_SERVER_PONG(Packet *) { return this->ReceiveInvalidPacket(ADMIN_PACKET_SERVER_PONG); }

src/network/core/tcp_content.cpp

@@ -170,13 +170,13 @@ bool NetworkContentSocketHandler::ReceiveInvalidPacket(PacketContentType type)
 	return false;
 }
 
-bool NetworkContentSocketHandler::Receive_CLIENT_INFO_LIST(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_LIST); }
-bool NetworkContentSocketHandler::Receive_CLIENT_INFO_ID(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_ID); }
-bool NetworkContentSocketHandler::Receive_CLIENT_INFO_EXTID(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_EXTID); }
-bool NetworkContentSocketHandler::Receive_CLIENT_INFO_EXTID_MD5(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_EXTID_MD5); }
-bool NetworkContentSocketHandler::Receive_SERVER_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_SERVER_INFO); }
-bool NetworkContentSocketHandler::Receive_CLIENT_CONTENT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_CONTENT); }
-bool NetworkContentSocketHandler::Receive_SERVER_CONTENT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CONTENT_SERVER_CONTENT); }
+bool NetworkContentSocketHandler::Receive_CLIENT_INFO_LIST(Packet *) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_LIST); }
+bool NetworkContentSocketHandler::Receive_CLIENT_INFO_ID(Packet *) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_ID); }
+bool NetworkContentSocketHandler::Receive_CLIENT_INFO_EXTID(Packet *) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_EXTID); }
+bool NetworkContentSocketHandler::Receive_CLIENT_INFO_EXTID_MD5(Packet *) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_INFO_EXTID_MD5); }
+bool NetworkContentSocketHandler::Receive_SERVER_INFO(Packet *) { return this->ReceiveInvalidPacket(PACKET_CONTENT_SERVER_INFO); }
+bool NetworkContentSocketHandler::Receive_CLIENT_CONTENT(Packet *) { return this->ReceiveInvalidPacket(PACKET_CONTENT_CLIENT_CONTENT); }
+bool NetworkContentSocketHandler::Receive_SERVER_CONTENT(Packet *) { return this->ReceiveInvalidPacket(PACKET_CONTENT_SERVER_CONTENT); }
 
 /**
  * Helper to get the subdirectory a #ContentInfo is located in.

src/network/core/tcp_coordinator.cpp

@@ -87,20 +87,20 @@ bool NetworkCoordinatorSocketHandler::ReceiveInvalidPacket(PacketCoordinatorType
 	return false;
 }
 
-bool NetworkCoordinatorSocketHandler::Receive_GC_ERROR(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_ERROR); }
-bool NetworkCoordinatorSocketHandler::Receive_SERVER_REGISTER(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERVER_REGISTER); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_REGISTER_ACK(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_REGISTER_ACK); }
-bool NetworkCoordinatorSocketHandler::Receive_SERVER_UPDATE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERVER_UPDATE); }
-bool NetworkCoordinatorSocketHandler::Receive_CLIENT_LISTING(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_LISTING); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_LISTING(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_LISTING); }
-bool NetworkCoordinatorSocketHandler::Receive_CLIENT_CONNECT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_CONNECT); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_CONNECTING(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_CONNECTING); }
-bool NetworkCoordinatorSocketHandler::Receive_SERCLI_CONNECT_FAILED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERCLI_CONNECT_FAILED); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_CONNECT_FAILED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_CONNECT_FAILED); }
-bool NetworkCoordinatorSocketHandler::Receive_CLIENT_CONNECTED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_CONNECTED); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_DIRECT_CONNECT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_DIRECT_CONNECT); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_STUN_REQUEST(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_STUN_REQUEST); }
-bool NetworkCoordinatorSocketHandler::Receive_SERCLI_STUN_RESULT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERCLI_STUN_RESULT); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_STUN_CONNECT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_STUN_CONNECT); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_NEWGRF_LOOKUP(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_NEWGRF_LOOKUP); }
-bool NetworkCoordinatorSocketHandler::Receive_GC_TURN_CONNECT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_TURN_CONNECT); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_ERROR(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_ERROR); }
+bool NetworkCoordinatorSocketHandler::Receive_SERVER_REGISTER(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERVER_REGISTER); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_REGISTER_ACK(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_REGISTER_ACK); }
+bool NetworkCoordinatorSocketHandler::Receive_SERVER_UPDATE(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERVER_UPDATE); }
+bool NetworkCoordinatorSocketHandler::Receive_CLIENT_LISTING(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_LISTING); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_LISTING(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_LISTING); }
+bool NetworkCoordinatorSocketHandler::Receive_CLIENT_CONNECT(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_CONNECT); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_CONNECTING(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_CONNECTING); }
+bool NetworkCoordinatorSocketHandler::Receive_SERCLI_CONNECT_FAILED(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERCLI_CONNECT_FAILED); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_CONNECT_FAILED(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_CONNECT_FAILED); }
+bool NetworkCoordinatorSocketHandler::Receive_CLIENT_CONNECTED(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_CLIENT_CONNECTED); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_DIRECT_CONNECT(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_DIRECT_CONNECT); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_STUN_REQUEST(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_STUN_REQUEST); }
+bool NetworkCoordinatorSocketHandler::Receive_SERCLI_STUN_RESULT(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_SERCLI_STUN_RESULT); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_STUN_CONNECT(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_STUN_CONNECT); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_NEWGRF_LOOKUP(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_NEWGRF_LOOKUP); }
+bool NetworkCoordinatorSocketHandler::Receive_GC_TURN_CONNECT(Packet *) { return this->ReceiveInvalidPacket(PACKET_COORDINATOR_GC_TURN_CONNECT); }

src/network/core/tcp_game.cpp

@@ -40,7 +40,7 @@ NetworkGameSocketHandler::NetworkGameSocketHandler(SOCKET s) : info(nullptr), cl
  * For servers: close connection and that is it
  * @return the new status
  */
-NetworkRecvStatus NetworkGameSocketHandler::CloseConnection(bool error)
+NetworkRecvStatus NetworkGameSocketHandler::CloseConnection(bool)
 {
 	/* Clients drop back to the main menu */
 	if (!_network_server && _networking) {
@@ -156,50 +156,50 @@ NetworkRecvStatus NetworkGameSocketHandler::ReceiveInvalidPacket(PacketGameType
 	return NETWORK_RECV_STATUS_MALFORMED_PACKET;
 }
 
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_FULL(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_FULL); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_BANNED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_BANNED); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_JOIN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_JOIN); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_ERROR(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_ERROR); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GAME_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GAME_INFO); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_GAME_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_GAME_INFO); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CLIENT_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CLIENT_INFO); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEED_GAME_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEED_GAME_PASSWORD); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEED_COMPANY_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEED_COMPANY_PASSWORD); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GAME_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GAME_PASSWORD); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_COMPANY_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_COMPANY_PASSWORD); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_WELCOME(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_WELCOME); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GETMAP(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GETMAP); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_WAIT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_WAIT); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_BEGIN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_BEGIN); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_SIZE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_SIZE); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_DATA(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_DATA); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_DONE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_DONE); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_MAP_OK(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_MAP_OK); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_JOIN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_JOIN); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_FRAME(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_FRAME); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_SYNC(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_SYNC); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_ACK(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_ACK); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_COMMAND(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_COMMAND); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_COMMAND(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_COMMAND); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_CHAT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_CHAT); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CHAT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CHAT); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_EXTERNAL_CHAT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_EXTERNAL_CHAT); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_SET_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_SET_PASSWORD); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_SET_NAME(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_SET_NAME); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_QUIT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_QUIT); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_ERROR(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_ERROR); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_QUIT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_QUIT); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_ERROR_QUIT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_ERROR_QUIT); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_SHUTDOWN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_SHUTDOWN); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEWGAME(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEWGAME); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_RCON(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_RCON); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_RCON(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_RCON); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CHECK_NEWGRFS(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CHECK_NEWGRFS); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_NEWGRFS_CHECKED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_NEWGRFS_CHECKED); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MOVE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MOVE); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_MOVE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_MOVE); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_COMPANY_UPDATE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_COMPANY_UPDATE); }
-NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CONFIG_UPDATE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CONFIG_UPDATE); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_FULL(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_FULL); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_BANNED(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_BANNED); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_JOIN(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_JOIN); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_ERROR(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_ERROR); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GAME_INFO(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GAME_INFO); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_GAME_INFO(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_GAME_INFO); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CLIENT_INFO(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_CLIENT_INFO); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEED_GAME_PASSWORD(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEED_GAME_PASSWORD); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEED_COMPANY_PASSWORD(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEED_COMPANY_PASSWORD); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GAME_PASSWORD(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GAME_PASSWORD); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_COMPANY_PASSWORD(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_COMPANY_PASSWORD); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_WELCOME(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_WELCOME); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GETMAP(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GETMAP); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_WAIT(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_WAIT); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_BEGIN(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_BEGIN); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_SIZE(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_SIZE); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_DATA(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_DATA); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_DONE(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_DONE); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_MAP_OK(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_MAP_OK); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_JOIN(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_JOIN); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_FRAME(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_FRAME); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_SYNC(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_SYNC); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_ACK(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_ACK); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_COMMAND(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_COMMAND); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_COMMAND(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_COMMAND); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_CHAT(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_CHAT); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CHAT(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_CHAT); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_EXTERNAL_CHAT(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_EXTERNAL_CHAT); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_SET_PASSWORD(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_SET_PASSWORD); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_SET_NAME(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_SET_NAME); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_QUIT(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_QUIT); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_ERROR(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_ERROR); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_QUIT(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_QUIT); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_ERROR_QUIT(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_ERROR_QUIT); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_SHUTDOWN(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_SHUTDOWN); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEWGAME(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEWGAME); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_RCON(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_RCON); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_RCON(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_RCON); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CHECK_NEWGRFS(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_CHECK_NEWGRFS); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_NEWGRFS_CHECKED(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_NEWGRFS_CHECKED); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MOVE(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_MOVE); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_MOVE(Packet *) { return this->ReceiveInvalidPacket(PACKET_CLIENT_MOVE); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_COMPANY_UPDATE(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_COMPANY_UPDATE); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CONFIG_UPDATE(Packet *) { return this->ReceiveInvalidPacket(PACKET_SERVER_CONFIG_UPDATE); }
 
 void NetworkGameSocketHandler::DeferDeletion()
 {

src/network/core/tcp_stun.cpp

@@ -26,4 +26,4 @@ bool NetworkStunSocketHandler::ReceiveInvalidPacket(PacketStunType type)
 	return false;
 }
 
-bool NetworkStunSocketHandler::Receive_SERCLI_STUN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_STUN_SERCLI_STUN); }
+bool NetworkStunSocketHandler::Receive_SERCLI_STUN(Packet *) { return this->ReceiveInvalidPacket(PACKET_STUN_SERCLI_STUN); }

src/network/core/tcp_turn.cpp

@@ -66,6 +66,6 @@ bool NetworkTurnSocketHandler::ReceiveInvalidPacket(PacketTurnType type)
 	return false;
 }
 
-bool NetworkTurnSocketHandler::Receive_TURN_ERROR(Packet *p) { return this->ReceiveInvalidPacket(PACKET_TURN_TURN_ERROR); }
-bool NetworkTurnSocketHandler::Receive_SERCLI_CONNECT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_TURN_SERCLI_CONNECT); }
-bool NetworkTurnSocketHandler::Receive_TURN_CONNECTED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_TURN_TURN_CONNECTED); }
+bool NetworkTurnSocketHandler::Receive_TURN_ERROR(Packet *) { return this->ReceiveInvalidPacket(PACKET_TURN_TURN_ERROR); }
+bool NetworkTurnSocketHandler::Receive_SERCLI_CONNECT(Packet *) { return this->ReceiveInvalidPacket(PACKET_TURN_SERCLI_CONNECT); }
+bool NetworkTurnSocketHandler::Receive_TURN_CONNECTED(Packet *) { return this->ReceiveInvalidPacket(PACKET_TURN_TURN_CONNECTED); }

src/network/core/udp.cpp

@@ -183,5 +183,5 @@ void NetworkUDPSocketHandler::ReceiveInvalidPacket(PacketUDPType type, NetworkAd
 	Debug(net, 0, "[udp] Received packet type {} on wrong port from {}", type, client_addr->GetAddressAsString());
 }
 
-void NetworkUDPSocketHandler::Receive_CLIENT_FIND_SERVER(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_CLIENT_FIND_SERVER, client_addr); }
-void NetworkUDPSocketHandler::Receive_SERVER_RESPONSE(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_SERVER_RESPONSE, client_addr); }
+void NetworkUDPSocketHandler::Receive_CLIENT_FIND_SERVER(Packet *, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_CLIENT_FIND_SERVER, client_addr); }
+void NetworkUDPSocketHandler::Receive_SERVER_RESPONSE(Packet *, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_SERVER_RESPONSE, client_addr); }

src/network/network.cpp

@@ -870,7 +870,7 @@ bool NetworkServerStart()
 	/* Check for the client and server names to be set, but only after the scripts had a chance to set them.*/
 	if (_network_dedicated) CheckClientAndServerName();
 
-	NetworkDisconnect(false, false);
+	NetworkDisconnect(false);
 	NetworkInitialize(false);
 	NetworkUDPInitialize();
 	Debug(net, 5, "Starting listeners for clients");
@@ -938,10 +938,9 @@ void NetworkReboot()
 
 /**
  * We want to disconnect from the host/clients.
- * @param blocking whether to wait till everything has been closed.
  * @param close_admins Whether the admin sockets need to be closed as well.
  */
-void NetworkDisconnect(bool blocking, bool close_admins)
+void NetworkDisconnect(bool close_admins)
 {
 	if (_network_server) {
 		for (NetworkClientSocket *cs : NetworkClientSocket::Iterate()) {
@@ -1263,7 +1262,7 @@ void NetworkStartUp()
 /** This shuts the network down */
 void NetworkShutDown()
 {
-	NetworkDisconnect(true);
+	NetworkDisconnect();
 	NetworkHTTPUninitialize();
 	NetworkUDPClose();
 

src/network/network_admin.cpp

@@ -654,7 +654,7 @@ NetworkRecvStatus ServerNetworkAdminSocketHandler::Receive_ADMIN_JOIN(Packet *p)
 	return this->SendProtocol();
 }
 
-NetworkRecvStatus ServerNetworkAdminSocketHandler::Receive_ADMIN_QUIT(Packet *p)
+NetworkRecvStatus ServerNetworkAdminSocketHandler::Receive_ADMIN_QUIT(Packet *)
 {
 	/* The admin is leaving nothing else to do */
 	return this->CloseConnection();

src/network/network_chat_gui.cpp

@@ -308,7 +308,7 @@ struct NetworkChatWindow : public Window {
 		this->Window::Close();
 	}
 
-	void FindWindowPlacementAndResize(int def_width, int def_height) override
+	void FindWindowPlacementAndResize([[maybe_unused]] int def_width, [[maybe_unused]] int def_height) override
 	{
 		Window::FindWindowPlacementAndResize(_toolbar_width, def_height);
 	}
@@ -436,7 +436,7 @@ struct NetworkChatWindow : public Window {
 		}
 	}
 
-	Point OnInitialPosition(int16_t sm_width, int16_t sm_height, int window_number) override
+	Point OnInitialPosition([[maybe_unused]] int16_t sm_width, [[maybe_unused]] int16_t sm_height, [[maybe_unused]] int window_number) override
 	{
 		Point pt = { 0, _screen.height - sm_height - FindWindowById(WC_STATUS_BAR, 0)->height };
 		return pt;
@@ -451,7 +451,7 @@ struct NetworkChatWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_NC_SENDBUTTON: /* Send */
@@ -464,7 +464,7 @@ struct NetworkChatWindow : public Window {
 		}
 	}
 
-	EventState OnKeyPress(char32_t key, uint16_t keycode) override
+	EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
 	{
 		EventState state = ES_NOT_HANDLED;
 		if (keycode == WKC_TAB) {
@@ -474,9 +474,11 @@ struct NetworkChatWindow : public Window {
 		return state;
 	}
 
-	void OnEditboxChanged(int wid) override
+	void OnEditboxChanged(int widget) override
 	{
-		_chat_tab_completion_active = false;
+		if (widget == WID_NC_TEXTBOX) {
+			_chat_tab_completion_active = false;
+		}
 	}
 
 	/**
@@ -484,7 +486,7 @@ struct NetworkChatWindow : public Window {
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (data == this->dest) this->Close();
 	}

src/network/network_client.cpp

@@ -534,7 +534,7 @@ bool ClientNetworkGameSocketHandler::IsConnected()
 
 extern bool SafeLoad(const std::string &filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, struct LoadFilter *lf = nullptr);
 
-NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_FULL(Packet *p)
+NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_FULL(Packet *)
 {
 	/* We try to join a server which is full */
 	ShowErrorMessage(STR_NETWORK_ERROR_SERVER_FULL, INVALID_STRING_ID, WL_CRITICAL);
@@ -542,7 +542,7 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_FULL(Packet *p)
 	return NETWORK_RECV_STATUS_SERVER_FULL;
 }
 
-NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_BANNED(Packet *p)
+NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_BANNED(Packet *)
 {
 	/* We try to join a server where we are banned */
 	ShowErrorMessage(STR_NETWORK_ERROR_SERVER_BANNED, INVALID_STRING_ID, WL_CRITICAL);
@@ -685,7 +685,7 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_CHECK_NEWGRFS(P
 	return ret;
 }
 
-NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_NEED_GAME_PASSWORD(Packet *p)
+NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_NEED_GAME_PASSWORD(Packet *)
 {
 	if (this->status < STATUS_JOIN || this->status >= STATUS_AUTH_GAME) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
 	this->status = STATUS_AUTH_GAME;
@@ -790,7 +790,7 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_MAP_DATA(Packet
 	return NETWORK_RECV_STATUS_OKAY;
 }
 
-NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_MAP_DONE(Packet *p)
+NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_MAP_DONE(Packet *)
 {
 	if (this->status != STATUS_MAP) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
 	if (this->savegame == nullptr) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
@@ -1035,7 +1035,7 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_JOIN(Packet *p)
 	return NETWORK_RECV_STATUS_OKAY;
 }
 
-NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_SHUTDOWN(Packet *p)
+NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_SHUTDOWN(Packet *)
 {
 	/* Only when we're trying to join we really
 	 * care about the server shutting down. */
@@ -1048,7 +1048,7 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_SHUTDOWN(Packet
 	return NETWORK_RECV_STATUS_SERVER_ERROR;
 }
 
-NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_NEWGAME(Packet *p)
+NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_NEWGAME(Packet *)
 {
 	/* Only when we're trying to join we really
 	 * care about the server shutting down. */

src/network/network_content.cpp

@@ -792,7 +792,7 @@ void ClientNetworkContentSocketHandler::Connect()
 /**
  * Disconnect from the content server.
  */
-NetworkRecvStatus ClientNetworkContentSocketHandler::CloseConnection(bool error)
+NetworkRecvStatus ClientNetworkContentSocketHandler::CloseConnection(bool)
 {
 	this->isCancelled = true;
 	NetworkContentSocketHandler::CloseConnection();

src/network/network_content.h

@@ -31,7 +31,7 @@ struct ContentCallback {
 	 * Callback for when the connection has finished
 	 * @param success whether the connection was made or that we failed to make it
 	 */
-	virtual void OnConnect(bool success) {}
+	virtual void OnConnect([[maybe_unused]] bool success) {}
 
 	/**
 	 * Callback for when the connection got disconnected.
@@ -42,20 +42,20 @@ struct ContentCallback {
 	 * We received a content info.
 	 * @param ci the content info
 	 */
-	virtual void OnReceiveContentInfo(const ContentInfo *ci) {}
+	virtual void OnReceiveContentInfo([[maybe_unused]] const ContentInfo *ci) {}
 
 	/**
 	 * We have progress in the download of a file
 	 * @param ci the content info of the file
 	 * @param bytes the number of bytes downloaded since the previous call
 	 */
-	virtual void OnDownloadProgress(const ContentInfo *ci, int bytes) {}
+	virtual void OnDownloadProgress([[maybe_unused]] const ContentInfo *ci, [[maybe_unused]] int bytes) {}
 
 	/**
 	 * We have finished downloading a file
 	 * @param cid the ContentID of the downloaded file
 	 */
-	virtual void OnDownloadComplete(ContentID cid) {}
+	virtual void OnDownloadComplete([[maybe_unused]] ContentID cid) {}
 
 	/** Silentium */
 	virtual ~ContentCallback() = default;

src/network/network_content_gui.cpp

@@ -114,7 +114,7 @@ void BaseNetworkContentDownloadStatusWindow::Close()
 	this->Window::Close();
 }
 
-void BaseNetworkContentDownloadStatusWindow::UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
+void BaseNetworkContentDownloadStatusWindow::UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize)
 {
 	switch (widget) {
 		case WID_NCDS_PROGRESS_BAR:
@@ -285,7 +285,7 @@ public:
 		this->BaseNetworkContentDownloadStatusWindow::Close();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (widget == WID_NCDS_CANCELOK) {
 			if (this->downloaded_bytes != this->total_bytes) {
@@ -581,7 +581,7 @@ public:
 		this->checkbox_size = maxdim(maxdim(GetSpriteSize(SPR_BOX_EMPTY), GetSpriteSize(SPR_BOX_CHECKED)), GetSpriteSize(SPR_BLOT));
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_NCL_CHECKBOX:
@@ -788,7 +788,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (widget >= WID_NCL_TEXTFILE && widget < WID_NCL_TEXTFILE + TFT_CONTENT_END) {
 			if (this->selected == nullptr || this->selected->state != ContentInfo::ALREADY_HERE) return;
@@ -873,7 +873,7 @@ public:
 		}
 	}
 
-	EventState OnKeyPress(char32_t key, uint16_t keycode) override
+	EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
 	{
 		if (this->vscroll->UpdateListPositionOnKeyPress(this->list_pos, keycode) == ES_NOT_HANDLED) {
 			switch (keycode) {
@@ -943,7 +943,7 @@ public:
 		this->InvalidateData(0, false);
 	}
 
-	void OnDownloadComplete(ContentID cid) override
+	void OnDownloadComplete(ContentID) override
 	{
 		this->content.ForceResort();
 		this->InvalidateData();
@@ -965,7 +965,7 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		if (!gui_scope) return;
 		if (this->content.NeedRebuild()) this->BuildContentList();

src/network/network_content_gui.h

@@ -33,7 +33,7 @@ public:
 	BaseNetworkContentDownloadStatusWindow(WindowDesc *desc);
 
 	void Close() override;
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override;
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override;
 	void DrawWidget(const Rect &r, int widget) const override;
 	void OnDownloadProgress(const ContentInfo *ci, int bytes) override;
 };

src/network/network_func.h

@@ -43,7 +43,7 @@ void NetworkUpdateServerGameType();
 bool NetworkCompanyHasClients(CompanyID company);
 std::string NetworkChangeCompanyPassword(CompanyID company_id, std::string password);
 void NetworkReboot();
-void NetworkDisconnect(bool blocking = false, bool close_admins = true);
+void NetworkDisconnect(bool close_admins = true);
 void NetworkGameLoop();
 void NetworkBackgroundLoop();
 std::string_view ParseFullConnectionString(const std::string &connection_string, uint16_t &port, CompanyID *company_id = nullptr);

src/network/network_gui.cpp

@@ -515,7 +515,7 @@ public:
 		this->flag_offset = this->blot_offset + ScaleGUITrad(2) + GetSpriteSize(SPR_BLOT).width;
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_NG_MATRIX:
@@ -720,7 +720,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_NG_CANCEL: // Cancel button
@@ -818,13 +818,13 @@ public:
 	 * @param data Information about the changed data.
 	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 	 */
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		this->servers.ForceRebuild();
 		this->SetDirty();
 	}
 
-	EventState OnKeyPress(char32_t key, uint16_t keycode) override
+	EventState OnKeyPress([[maybe_unused]] char32_t key, uint16_t keycode) override
 	{
 		EventState state = ES_NOT_HANDLED;
 
@@ -888,7 +888,7 @@ public:
 	}
 
 	/** Refresh the online servers on a regular interval. */
-	IntervalTimer<TimerWindow> refresh_interval = {std::chrono::seconds(30), [this](uint count) {
+	IntervalTimer<TimerWindow> refresh_interval = {std::chrono::seconds(30), [this](uint) {
 		if (!this->searched_internet) return;
 
 		_network_coordinator_client.GetListing();
@@ -1058,7 +1058,7 @@ struct NetworkStartServerWindow : public Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_NSS_CONNTYPE_BTN:
@@ -1078,7 +1078,7 @@ struct NetworkStartServerWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_NSS_CANCEL: // Cancel button
@@ -1369,30 +1369,27 @@ enum DropDownAdmin {
 
 /**
  * Callback function for admin command to kick client.
- * @param w The window which initiated the confirmation dialog.
  * @param confirmed Iff the user pressed Yes.
  */
-static void AdminClientKickCallback(Window *w, bool confirmed)
+static void AdminClientKickCallback(Window *, bool confirmed)
 {
 	if (confirmed) NetworkServerKickClient(_admin_client_id, {});
 }
 
 /**
  * Callback function for admin command to ban client.
- * @param w The window which initiated the confirmation dialog.
  * @param confirmed Iff the user pressed Yes.
  */
-static void AdminClientBanCallback(Window *w, bool confirmed)
+static void AdminClientBanCallback(Window *, bool confirmed)
 {
 	if (confirmed) NetworkServerKickOrBanIP(_admin_client_id, true, {});
 }
 
 /**
  * Callback function for admin command to reset company.
- * @param w The window which initiated the confirmation dialog.
  * @param confirmed Iff the user pressed Yes.
  */
-static void AdminCompanyResetCallback(Window *w, bool confirmed)
+static void AdminCompanyResetCallback(Window *, bool confirmed)
 {
 	if (confirmed) {
 		if (NetworkCompanyHasClients(_admin_company_id)) return;
@@ -1402,10 +1399,9 @@ static void AdminCompanyResetCallback(Window *w, bool confirmed)
 
 /**
  * Callback function for admin command to unlock company.
- * @param w The window which initiated the confirmation dialog.
  * @param confirmed Iff the user pressed Yes.
  */
-static void AdminCompanyUnlockCallback(Window *w, bool confirmed)
+static void AdminCompanyUnlockCallback(Window *, bool confirmed)
 {
 	if (confirmed) NetworkServerSetCompanyPassword(_admin_company_id, "", false);
 }
@@ -1500,7 +1496,7 @@ private:
 	 * @param pt The point where this button was clicked.
 	 * @param company_id The company this button was assigned to.
 	 */
-	static void OnClickCompanyChat(NetworkClientListWindow *w, Point pt, CompanyID company_id)
+	static void OnClickCompanyChat([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id)
 	{
 		ShowNetworkChatQueryWindow(DESTTYPE_TEAM, company_id);
 	}
@@ -1511,7 +1507,7 @@ private:
 	 * @param pt The point where this button was clicked.
 	 * @param company_id The company this button was assigned to.
 	 */
-	static void OnClickCompanyJoin(NetworkClientListWindow *w, Point pt, CompanyID company_id)
+	static void OnClickCompanyJoin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id)
 	{
 		if (_network_server) {
 			NetworkServerDoMove(CLIENT_ID_SERVER, company_id);
@@ -1529,9 +1525,8 @@ private:
 	 * Crete new company button is clicked.
 	 * @param w The instance of this window.
 	 * @param pt The point where this button was clicked.
-	 * @param company_id The company this button was assigned to.
 	 */
-	static void OnClickCompanyNew(NetworkClientListWindow *w, Point pt, CompanyID company_id)
+	static void OnClickCompanyNew([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID)
 	{
 		if (_network_server) {
 			Command<CMD_COMPANY_CTRL>::Post(CCA_NEW, INVALID_COMPANY, CRR_NONE, _network_own_client_id);
@@ -1546,7 +1541,7 @@ private:
 	 * @param pt The point where this button was clicked.
 	 * @param client_id The client this button was assigned to.
 	 */
-	static void OnClickClientAdmin(NetworkClientListWindow *w, Point pt, ClientID client_id)
+	static void OnClickClientAdmin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, ClientID client_id)
 	{
 		DropDownList list;
 		list.emplace_back(new DropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_CLIENT_KICK, DD_CLIENT_ADMIN_KICK, false));
@@ -1568,7 +1563,7 @@ private:
 	 * @param pt The point where this button was clicked.
 	 * @param company_id The company this button was assigned to.
 	 */
-	static void OnClickCompanyAdmin(NetworkClientListWindow *w, Point pt, CompanyID company_id)
+	static void OnClickCompanyAdmin([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, CompanyID company_id)
 	{
 		DropDownList list;
 		list.emplace_back(new DropDownListStringItem(STR_NETWORK_CLIENT_LIST_ADMIN_COMPANY_RESET, DD_COMPANY_ADMIN_RESET, NetworkCompanyHasClients(company_id)));
@@ -1589,7 +1584,7 @@ private:
 	 * @param pt The point where this button was clicked.
 	 * @param client_id The client this button was assigned to.
 	 */
-	static void OnClickClientChat(NetworkClientListWindow *w, Point pt, ClientID client_id)
+	static void OnClickClientChat([[maybe_unused]] NetworkClientListWindow *w, [[maybe_unused]] Point pt, ClientID client_id)
 	{
 		ShowNetworkChatQueryWindow(DESTTYPE_CLIENT, client_id);
 	}
@@ -1717,7 +1712,7 @@ public:
 		RebuildList();
 	}
 
-	void OnInvalidateData(int data = 0, bool gui_scope = true) override
+	void OnInvalidateData([[maybe_unused]] int data = 0, [[maybe_unused]] bool gui_scope = true) override
 	{
 		this->RebuildList();
 
@@ -1726,7 +1721,7 @@ public:
 		this->SetWidgetDisabledState(WID_CL_SERVER_NAME_EDIT, !_network_server);
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_CL_SERVER_VISIBILITY:
@@ -1789,7 +1784,7 @@ public:
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_CL_SERVER_NAME_EDIT:
@@ -1823,7 +1818,7 @@ public:
 		}
 	}
 
-	bool OnTooltip(Point pt, int widget, TooltipCloseCondition close_cond) override
+	bool OnTooltip([[maybe_unused]] Point pt, int widget, TooltipCloseCondition close_cond) override
 	{
 		switch (widget) {
 			case WID_CL_MATRIX: {
@@ -2116,7 +2111,7 @@ public:
 		}
 	}
 
-	void OnMouseOver(Point pt, int widget) override
+	void OnMouseOver([[maybe_unused]] Point pt, int widget) override
 	{
 		if (widget != WID_CL_MATRIX) {
 			if (this->hover_index != -1) {
@@ -2203,7 +2198,7 @@ struct NetworkJoinStatusWindow : Window {
 		}
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		switch (widget) {
 			case WID_NJS_PROGRESS_BAR:
@@ -2229,7 +2224,7 @@ struct NetworkJoinStatusWindow : Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		if (widget == WID_NJS_CANCELOK) { // Disconnect button
 			NetworkDisconnect();
@@ -2318,7 +2313,7 @@ struct NetworkCompanyPasswordWindow : public Window {
 		this->ReInit();
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget == WID_NCP_WARNING) {
 			*size = this->warning_size;
@@ -2342,7 +2337,7 @@ struct NetworkCompanyPasswordWindow : public Window {
 		NetworkChangeCompanyPassword(_local_company, this->password_editbox.text.buf);
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_NCP_OK:
@@ -2418,7 +2413,7 @@ struct NetworkAskRelayWindow : public Window {
 		this->InitNested(0);
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget == WID_NAR_TEXT) {
 			*size = GetStringBoundingBox(STR_NETWORK_ASK_RELAY_TEXT);
@@ -2434,7 +2429,7 @@ struct NetworkAskRelayWindow : public Window {
 		}
 	}
 
-	void FindWindowPlacementAndResize(int def_width, int def_height) override
+	void FindWindowPlacementAndResize([[maybe_unused]] int def_width, [[maybe_unused]] int def_height) override
 	{
 		/* Position query window over the calling window, ensuring it's within screen bounds. */
 		this->left = Clamp(parent->left + (parent->width / 2) - (this->width / 2), 0, _screen.width - this->width);
@@ -2452,7 +2447,7 @@ struct NetworkAskRelayWindow : public Window {
 		}
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_NAR_NO:
@@ -2521,7 +2516,7 @@ struct NetworkAskSurveyWindow : public Window {
 		this->InitNested(0);
 	}
 
-	void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) override
+	void UpdateWidgetSize(int widget, Dimension *size, [[maybe_unused]] const Dimension &padding, [[maybe_unused]] Dimension *fill, [[maybe_unused]] Dimension *resize) override
 	{
 		if (widget == WID_NAS_TEXT) {
 			*size = GetStringBoundingBox(STR_NETWORK_ASK_SURVEY_TEXT);
@@ -2537,7 +2532,7 @@ struct NetworkAskSurveyWindow : public Window {
 		}
 	}
 
-	void FindWindowPlacementAndResize(int def_width, int def_height) override
+	void FindWindowPlacementAndResize([[maybe_unused]] int def_width, [[maybe_unused]] int def_height) override
 	{
 		/* Position query window over the calling window, ensuring it's within screen bounds. */
 		this->left = Clamp(parent->left + (parent->width / 2) - (this->width / 2), 0, _screen.width - this->width);
@@ -2545,7 +2540,7 @@ struct NetworkAskSurveyWindow : public Window {
 		this->SetDirty();
 	}
 
-	void OnClick(Point pt, int widget, int click_count) override
+	void OnClick([[maybe_unused]] Point pt, int widget, [[maybe_unused]] int click_count) override
 	{
 		switch (widget) {
 			case WID_NAS_PREVIEW: