Codechange: Replaced SmallVector::Append() with std::vector::[push|emplace]_back()

79 files changed, 404 insertions, 405 deletions

diff --git a/src/ai/ai_gui.cpp b/src/ai/ai_gui.cpp
index 0609696e1..8b00de988 100644
--- a/src/ai/ai_gui.cpp
+++ b/src/ai/ai_gui.cpp
@@ -481,7 +481,7 @@ struct AISettingsWindow : public Window {
 
 							DropDownList *list = new DropDownList();
 							for (int i = config_item.min_value; i <= config_item.max_value; i++) {
-								*list->Append() = new DropDownListCharStringItem(config_item.labels->Find(i)->second, i, false);
+								list->push_back(new DropDownListCharStringItem(config_item.labels->Find(i)->second, i, false));
 							}
 
 							ShowDropDownListAt(this, list, old_val, -1, wi_rect, COLOUR_ORANGE, true);
diff --git a/src/airport_gui.cpp b/src/airport_gui.cpp
index 353e08080..7e1671789 100644
--- a/src/airport_gui.cpp
+++ b/src/airport_gui.cpp
@@ -219,7 +219,7 @@ class BuildAirportWindow : public PickerWindowBase {
 		DropDownList *list = new DropDownList();
 
 		for (uint i = 0; i < AirportClass::GetClassCount(); i++) {
-			*list->Append() = new DropDownListStringItem(AirportClass::Get((AirportClassID)i)->name, i, false);
+			list->push_back(new DropDownListStringItem(AirportClass::Get((AirportClassID)i)->name, i, false));
 		}
 
 		return list;
diff --git a/src/autoreplace_gui.cpp b/src/autoreplace_gui.cpp
index 1286dc5a7..5b6976e67 100644
--- a/src/autoreplace_gui.cpp
+++ b/src/autoreplace_gui.cpp
@@ -140,7 +140,7 @@ class ReplaceVehicleWindow : public Window {
 				if (!CheckAutoreplaceValidity(this->sel_engine[0], eid, _local_company)) continue;
 			}
 
-			*list->Append() = eid;
+			list->push_back(eid);
 			if (eid == this->sel_engine[side]) selected_engine = eid; // The selected engine is still in the list
 		}
 		this->sel_engine[side] = selected_engine; // update which engine we selected (the same or none, if it's not in the list anymore)
@@ -468,8 +468,8 @@ public:
 
 			case WID_RV_TRAIN_ENGINEWAGON_DROPDOWN: {
 				DropDownList *list = new DropDownList();
-				*list->Append() = new DropDownListStringItem(STR_REPLACE_ENGINES, 1, false);
-				*list->Append() = new DropDownListStringItem(STR_REPLACE_WAGONS, 0, false);
+				list->push_back(new DropDownListStringItem(STR_REPLACE_ENGINES, 1, false));
+				list->push_back(new DropDownListStringItem(STR_REPLACE_WAGONS, 0, false));
 				ShowDropDownList(this, list, this->replace_engines ? 1 : 0, WID_RV_TRAIN_ENGINEWAGON_DROPDOWN);
 				break;
 			}
diff --git a/src/bridge_gui.cpp b/src/bridge_gui.cpp
index bbb54551e..94b709c63 100644
--- a/src/bridge_gui.cpp
+++ b/src/bridge_gui.cpp
@@ -416,12 +416,13 @@ void ShowBuildBridgeWindow(TileIndex start, TileIndex end, TransportType transpo
 		for (BridgeType brd_type = 0; brd_type != MAX_BRIDGES; brd_type++) {
 			if (CheckBridgeAvailability(brd_type, bridge_len).Succeeded()) {
 				/* bridge is accepted, add to list */
-				BuildBridgeData *item = bl->Append();
-				item->index = brd_type;
-				item->spec = GetBridgeSpec(brd_type);
+				/*C++17: BuildBridgeData &item = */ bl->emplace_back();
+				BuildBridgeData &item = bl->back();
+				item.index = brd_type;
+				item.spec = GetBridgeSpec(brd_type);
 				/* Add to terraforming & bulldozing costs the cost of the
 				 * bridge itself (not computed with DC_QUERY_COST) */
-				item->cost = ret.GetCost() + (((int64)tot_bridgedata_len * _price[PR_BUILD_BRIDGE] * item->spec->price) >> 8) + infra_cost;
+				item.cost = ret.GetCost() + (((int64)tot_bridgedata_len * _price[PR_BUILD_BRIDGE] * item.spec->price) >> 8) + infra_cost;
 			}
 		}
 	}
diff --git a/src/build_vehicle_gui.cpp b/src/build_vehicle_gui.cpp
index a118b1c99..c3d8743a2 100644
--- a/src/build_vehicle_gui.cpp
+++ b/src/build_vehicle_gui.cpp
@@ -1246,7 +1246,7 @@ struct BuildVehicleWindow : Window {
 			/* Filter now! So num_engines and num_wagons is valid */
 			if (!FilterSingleEngine(eid)) continue;
 
-			*this->eng_list.Append() = eid;
+			this->eng_list.push_back(eid);
 
 			if (rvi->railveh_type != RAILVEH_WAGON) {
 				num_engines++;
@@ -1284,7 +1284,7 @@ struct BuildVehicleWindow : Window {
 			EngineID eid = e->index;
 			if (!IsEngineBuildable(eid, VEH_ROAD, _local_company)) continue;
 			if (!HasBit(this->filter.roadtypes, HasBit(EngInfo(eid)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD)) continue;
-			*this->eng_list.Append() = eid;
+			this->eng_list.push_back(eid);
 
 			if (eid == this->sel_engine) sel_id = eid;
 		}
@@ -1302,7 +1302,7 @@ struct BuildVehicleWindow : Window {
 			if (!this->show_hidden_engines && e->IsHidden(_local_company)) continue;
 			EngineID eid = e->index;
 			if (!IsEngineBuildable(eid, VEH_SHIP, _local_company)) continue;
-			*this->eng_list.Append() = eid;
+			this->eng_list.push_back(eid);
 
 			if (eid == this->sel_engine) sel_id = eid;
 		}
@@ -1330,7 +1330,7 @@ struct BuildVehicleWindow : Window {
 			/* First VEH_END window_numbers are fake to allow a window open for all different types at once */
 			if (!this->listview_mode && !CanVehicleUseStation(eid, st)) continue;
 
-			*this->eng_list.Append() = eid;
+			this->eng_list.push_back(eid);
 			if (eid == this->sel_engine) sel_id = eid;
 		}
 
diff --git a/src/company_gui.cpp b/src/company_gui.cpp
index b34862f69..a705687b0 100644
--- a/src/company_gui.cpp
+++ b/src/company_gui.cpp
@@ -606,10 +606,10 @@ private:
 		if (default_livery != NULL) {
 			/* Add COLOUR_END to put the colour out of range, but also allow us to show what the default is */
 			default_col = (primary ? default_livery->colour1 : default_livery->colour2) + COLOUR_END;
-			*list->Append() = new DropDownListColourItem(default_col, false);
+			list->push_back(new DropDownListColourItem(default_col, false));
 		}
 		for (uint i = 0; i < lengthof(_colour_dropdown); i++) {
-			*list->Append() = new DropDownListColourItem(i, HasBit(used_colours, i));
+			list->push_back(new DropDownListColourItem(i, HasBit(used_colours, i)));
 		}
 
 		byte sel = (default_livery == NULL || HasBit(livery->in_use, primary ? 0 : 1)) ? (primary ? livery->colour1 : livery->colour2) : default_col;
@@ -642,8 +642,8 @@ private:
 	{
 		for (const Group **g = source->Begin(); g != source->End(); g++) {
 			if ((*g)->parent != parent) continue;
-			*this->groups.Append() = *g;
-			*this->indents.Append() = indent;
+			this->groups.push_back(*g);
+			this->indents.push_back(indent);
 			AddChildren(source, (*g)->index, indent + 1);
 		}
 	}
@@ -662,7 +662,7 @@ private:
 			const Group *g;
 			FOR_ALL_GROUPS(g) {
 				if (g->owner == owner && g->vehicle_type == vtype) {
-					*list.Append() = g;
+					list.push_back(g);
 				}
 			}
 
diff --git a/src/core/pool_type.hpp b/src/core/pool_type.hpp
index 4d20ed1ab..a6f7e4fe8 100644
--- a/src/core/pool_type.hpp
+++ b/src/core/pool_type.hpp
@@ -50,7 +50,7 @@ struct PoolBase {
 	 */
 	PoolBase(PoolType pt) : type(pt)
 	{
-		*PoolBase::GetPools()->Append() = this;
+		PoolBase::GetPools()->push_back(this);
 	}
 
 	virtual ~PoolBase();
diff --git a/src/core/smallmap_type.hpp b/src/core/smallmap_type.hpp
index 0bd9bd296..0917c5423 100644
--- a/src/core/smallmap_type.hpp
+++ b/src/core/smallmap_type.hpp
@@ -143,9 +143,7 @@ struct SmallMap : SmallVector<SmallPair<T, U>, S> {
 	inline bool Insert(const T &key, const U &data)
 	{
 		if (this->Contains(key)) return false;
-		Pair *n = this->Append();
-		n->first = key;
-		n->second = data;
+		std::vector<Pair>::emplace_back(key, data);
 		return true;
 	}
 
@@ -160,9 +158,10 @@ struct SmallMap : SmallVector<SmallPair<T, U>, S> {
 		for (uint i = 0; i < std::vector<Pair>::size(); i++) {
 			if (key == std::vector<Pair>::operator[](i).first) return std::vector<Pair>::operator[](i).second;
 		}
-		Pair *n = this->Append();
-		n->first = key;
-		return n->second;
+		/*C++17: Pair &n = */ std::vector<Pair>::emplace_back();
+		Pair &n = std::vector<Pair>::back();
+		n.first = key;
+		return n.second;
 	}
 
 	inline void SortByKey()
diff --git a/src/core/smallvec_type.hpp b/src/core/smallvec_type.hpp
index b989d44c5..5961a9698 100644
--- a/src/core/smallvec_type.hpp
+++ b/src/core/smallvec_type.hpp
@@ -67,17 +67,6 @@ public:
 	~SmallVector() = default;
 
 	/**
-	 * Append an item and return it.
-	 * @param to_add the number of items to append
-	 * @return pointer to newly allocated item
-	 */
-	inline T *Append(uint to_add = 1)
-	{
-		std::vector<T>::resize(std::vector<T>::size() + to_add);
-		return this->End() - to_add;
-	}
-
-	/**
 	 * Insert a new item at a specific position into the vector, moving all following items.
 	 * @param item Position at which the new item should be inserted
 	 * @return pointer to the new item
@@ -112,7 +101,7 @@ public:
 	inline bool Include(const T &item)
 	{
 		bool is_member = std::find(std::vector<T>::begin(), std::vector<T>::end(), item) != std::vector<T>::end();
-		if (!is_member) *this->Append() = item;
+		if (!is_member) std::vector<T>::emplace_back(item);
 		return is_member;
 	}
 
@@ -157,6 +146,23 @@ public:
 	}
 };
 
+/**
+ * Helper function to extend a vector by more than one element
+ * Consider using std::back_inserter in new code
+ *
+ * @param vec A reference to the vector to be extended
+ * @param num The number of elements to default-construct
+ *
+ * @return Pointer to the first new element
+ */
+template <typename T>
+inline T* grow(std::vector<T>& vec, std::size_t num)
+{
+	const std::size_t pos = vec.size();
+	vec.resize(pos + num);
+	return vec.data() + pos;
+}
+
 
 /**
  * Simple vector template class, with automatic free.
diff --git a/src/date_gui.cpp b/src/date_gui.cpp
index 53e0cf735..d55e7e2b3 100644
--- a/src/date_gui.cpp
+++ b/src/date_gui.cpp
@@ -75,14 +75,14 @@ struct SetDateWindow : Window {
 
 			case WID_SD_DAY:
 				for (uint i = 0; i < 31; i++) {
-					*list->Append() = new DropDownListStringItem(STR_DAY_NUMBER_1ST + i, i + 1, false);
+					list->push_back(new DropDownListStringItem(STR_DAY_NUMBER_1ST + i, i + 1, false));
 				}
 				selected = this->date.day;
 				break;
 
 			case WID_SD_MONTH:
 				for (uint i = 0; i < 12; i++) {
-					*list->Append() = new DropDownListStringItem(STR_MONTH_JAN + i, i, false);
+					list->push_back(new DropDownListStringItem(STR_MONTH_JAN + i, i, false));
 				}
 				selected = this->date.month;
 				break;
@@ -91,7 +91,7 @@ struct SetDateWindow : Window {
 				for (Year i = this->min_year; i <= this->max_year; i++) {
 					DropDownListParamStringItem *item = new DropDownListParamStringItem(STR_JUST_INT, i, false);
 					item->SetParam(0, i);
-					*list->Append() = item;
+					list->push_back(item);
 				}
 				selected = this->date.year;
 				break;
diff --git a/src/engine.cpp b/src/engine.cpp
index b7be293af..7412ec639 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -490,11 +490,12 @@ void EngineOverrideManager::ResetToDefaultMapping()
 	this->clear();
 	for (VehicleType type = VEH_TRAIN; type <= VEH_AIRCRAFT; type++) {
 		for (uint internal_id = 0; internal_id < _engine_counts[type]; internal_id++) {
-			EngineIDMapping *eid = this->Append();
-			eid->type            = type;
-			eid->grfid           = INVALID_GRFID;
-			eid->internal_id     = internal_id;
-			eid->substitute_id   = internal_id;
+			/*C++17: EngineIDMapping &eid = */ this->emplace_back();
+			EngineIDMapping &eid = this->back();
+			eid.type            = type;
+			eid.grfid           = INVALID_GRFID;
+			eid.internal_id     = internal_id;
+			eid.substitute_id   = internal_id;
 		}
 	}
 }
diff --git a/src/fios.h b/src/fios.h
index 85b6b0dd6..b1d260f84 100644
--- a/src/fios.h
+++ b/src/fios.h
@@ -120,7 +120,8 @@ public:
 	 */
 	inline FiosItem *Append()
 	{
-		return this->files.Append();
+		/*C++17: return &*/ this->files.emplace_back();
+		return &this->files.back();
 	}
 
 	/**
diff --git a/src/game/game_text.cpp b/src/game/game_text.cpp
index 781d0daba..4d67b6955 100644
--- a/src/game/game_text.cpp
+++ b/src/game/game_text.cpp
@@ -115,7 +115,7 @@ LanguageStrings *ReadRawLanguageStrings(const char *file)
 			while (i > 0 && (buffer[i - 1] == '\r' || buffer[i - 1] == '\n' || buffer[i - 1] == ' ')) i--;
 			buffer[i] = '\0';
 
-			*ret->lines.Append() = stredup(buffer, buffer + to_read - 1);
+			ret->lines.push_back(stredup(buffer, buffer + to_read - 1));
 
 			if (len > to_read) {
 				to_read = 0;
@@ -194,7 +194,7 @@ struct TranslationWriter : LanguageWriter {
 		char *dest = MallocT<char>(length + 1);
 		memcpy(dest, buffer, length);
 		dest[length] = '\0';
-		*this->strings->Append() = dest;
+		this->strings->push_back(dest);
 	}
 };
 
@@ -212,7 +212,7 @@ struct StringNameWriter : HeaderWriter {
 
 	void WriteStringID(const char *name, int stringid)
 	{
-		if (stringid == (int)this->strings->size()) *this->strings->Append() = stredup(name);
+		if (stringid == (int)this->strings->size()) this->strings->push_back(stredup(name));
 	}
 
 	void Finalise(const StringData &data)
@@ -246,7 +246,7 @@ public:
 	{
 		if (strcmp(filename, exclude) == 0) return true;
 
-		*gs->raw_strings.Append() = ReadRawLanguageStrings(filename);
+		gs->raw_strings.push_back(ReadRawLanguageStrings(filename));
 		return true;
 	}
 };
@@ -269,7 +269,7 @@ GameStrings *LoadTranslations()
 
 	GameStrings *gs = new GameStrings();
 	try {
-		*gs->raw_strings.Append() = ReadRawLanguageStrings(filename);
+		gs->raw_strings.push_back(ReadRawLanguageStrings(filename));
 
 		/* Scan for other language files */
 		LanguageScanner scanner(gs, filename);
@@ -324,8 +324,8 @@ void GameStrings::Compile()
 		translation_reader.ParseFile();
 		if (_errors != 0) throw std::exception();
 
-		LanguageStrings *compiled = *this->compiled_strings.Append() = new LanguageStrings((*p)->language);
-		TranslationWriter writer(&compiled->lines);
+		this->compiled_strings.push_back(new LanguageStrings((*p)->language));
+		TranslationWriter writer(&this->compiled_strings.back()->lines);
 		writer.WriteLang(data);
 	}
 }
diff --git a/src/genworld_gui.cpp b/src/genworld_gui.cpp
index 4631d02ee..d4aad6221 100644
--- a/src/genworld_gui.cpp
+++ b/src/genworld_gui.cpp
@@ -289,7 +289,7 @@ static DropDownList *BuildMapsizeDropDown()
 	for (uint i = MIN_MAP_SIZE_BITS; i <= MAX_MAP_SIZE_BITS; i++) {
 		DropDownListParamStringItem *item = new DropDownListParamStringItem(STR_JUST_INT, i, false);
 		item->SetParam(0, 1LL << i);
-		*list->Append() = item;
+		list->push_back(item);
 	}
 
 	return list;
diff --git a/src/gfx_layout.cpp b/src/gfx_layout.cpp
index 786e07408..ee0ba1533 100644
--- a/src/gfx_layout.cpp
+++ b/src/gfx_layout.cpp
@@ -150,7 +150,7 @@ public:
 		ICULine(icu::ParagraphLayout::Line *l) : l(l)
 		{
 			for (int i = 0; i < l->countRuns(); i++) {
-				*this->Append() = new ICUVisualRun(l->getVisualRun(i));
+				this->push_back(new ICUVisualRun(l->getVisualRun(i)));
 			}
 		}
 		~ICULine() { delete l; }
@@ -498,7 +498,7 @@ const ParagraphLayouter::Line *FallbackParagraphLayout::NextLine(int max_width)
 	if (*this->buffer == '\0') {
 		/* Only a newline. */
 		this->buffer = NULL;
-		*l->Append() = new FallbackVisualRun(this->runs.Begin()->second, this->buffer, 0, 0);
+		l->push_back(new FallbackVisualRun(this->runs.Begin()->second, this->buffer, 0, 0));
 		return l;
 	}
 
@@ -527,7 +527,7 @@ const ParagraphLayouter::Line *FallbackParagraphLayout::NextLine(int max_width)
 
 		if (this->buffer == next_run) {
 			int w = l->GetWidth();
-			*l->Append() = new FallbackVisualRun(iter->second, begin, this->buffer - begin, w);
+			l->push_back(new FallbackVisualRun(iter->second, begin, this->buffer - begin, w));
 			iter++;
 			assert(iter != this->runs.End());
 
@@ -574,7 +574,7 @@ const ParagraphLayouter::Line *FallbackParagraphLayout::NextLine(int max_width)
 
 	if (l->size() == 0 || last_char - begin != 0) {
 		int w = l->GetWidth();
-		*l->Append() = new FallbackVisualRun(iter->second, begin, last_char - begin, w);
+		l->push_back(new FallbackVisualRun(iter->second, begin, last_char - begin, w));
 	}
 	return l;
 }
@@ -720,7 +720,7 @@ Layouter::Layouter(const char *str, int maxw, TextColour colour, FontSize fontsi
 		/* Copy all lines into a local cache so we can reuse them later on more easily. */
 		const ParagraphLayouter::Line *l;
 		while ((l = line.layout->NextLine(maxw)) != NULL) {
-			*this->Append() = l;
+			this->push_back(l);
 		}
 
 	} while (c != '\0');
@@ -834,7 +834,7 @@ Font *Layouter::GetFont(FontSize size, TextColour colour)
 	if (it != fonts[size].End()) return it->second;
 
 	Font *f = new Font(size, colour);
-	*fonts[size].Append() = FontColourMap::Pair(colour, f);
+	fonts[size].emplace_back(colour, f);
 	return f;
 }
 
diff --git a/src/graph_gui.cpp b/src/graph_gui.cpp
index 1acf7728c..69bdb3b1f 100644
--- a/src/graph_gui.cpp
+++ b/src/graph_gui.cpp
@@ -1140,7 +1140,7 @@ private:
 
 		const Company *c;
 		FOR_ALL_COMPANIES(c) {
-			*this->companies.Append() = c;
+			this->companies.push_back(c);
 		}
 
 		this->companies.shrink_to_fit();
diff --git a/src/group_gui.cpp b/src/group_gui.cpp
index d64f9c51b..eb7aac0b7 100644
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -129,8 +129,8 @@ private:
 	{
 		for (const Group **g = source->Begin(); g != source->End(); g++) {
 			if ((*g)->parent != parent) continue;
-			*this->groups.Append() = *g;
-			*this->indents.Append() = indent;
+			this->groups.push_back(*g);
+			this->indents.push_back(indent);
 			AddChildren(source, (*g)->index, indent + 1);
 		}
 	}
@@ -175,7 +175,7 @@ private:
 		const Group *g;
 		FOR_ALL_GROUPS(g) {
 			if (g->owner == owner && g->vehicle_type == this->vli.vtype) {
-				*list.Append() = g;
+				list.push_back(g);
 			}
 		}
 
diff --git a/src/hotkeys.cpp b/src/hotkeys.cpp
index 24e6b6c41..8bec7e400 100644
--- a/src/hotkeys.cpp
+++ b/src/hotkeys.cpp
@@ -255,7 +255,7 @@ HotkeyList::HotkeyList(const char *ini_group, Hotkey *items, GlobalHotkeyHandler
 	global_hotkey_handler(global_hotkey_handler), ini_group(ini_group), items(items)
 {
 	if (_hotkey_lists == NULL) _hotkey_lists = new SmallVector<HotkeyList*, 16>();
-	*_hotkey_lists->Append() = this;
+	_hotkey_lists->push_back(this);
 }
 
 HotkeyList::~HotkeyList()
diff --git a/src/industry_gui.cpp b/src/industry_gui.cpp
index 32c62bfa3..5bcc03bdb 100644
--- a/src/industry_gui.cpp
+++ b/src/industry_gui.cpp
@@ -1206,7 +1206,7 @@ protected:
 
 			const Industry *i;
 			FOR_ALL_INDUSTRIES(i) {
-				*this->industries.Append() = i;
+				this->industries.push_back(i);
 			}
 
 			this->industries.shrink_to_fit();
@@ -2415,12 +2415,13 @@ struct IndustryCargoesWindow : public Window {
 		_displayed_industries.set(it);
 
 		this->fields.clear();
-		CargoesRow *row = this->fields.Append();
-		row->columns[0].MakeHeader(STR_INDUSTRY_CARGOES_PRODUCERS);
-		row->columns[1].MakeEmpty(CFT_SMALL_EMPTY);
-		row->columns[2].MakeEmpty(CFT_SMALL_EMPTY);
-		row->columns[3].MakeEmpty(CFT_SMALL_EMPTY);
-		row->columns[4].MakeHeader(STR_INDUSTRY_CARGOES_CUSTOMERS);
+		/*C++17: CargoesRow &row = */ this->fields.emplace_back();
+		CargoesRow &row = this->fields.back();
+		row.columns[0].MakeHeader(STR_INDUSTRY_CARGOES_PRODUCERS);
+		row.columns[1].MakeEmpty(CFT_SMALL_EMPTY);
+		row.columns[2].MakeEmpty(CFT_SMALL_EMPTY);
+		row.columns[3].MakeEmpty(CFT_SMALL_EMPTY);
+		row.columns[4].MakeHeader(STR_INDUSTRY_CARGOES_CUSTOMERS);
 
 		const IndustrySpec *central_sp = GetIndustrySpec(it);
 		bool houses_supply = HousesCanSupply(central_sp->accepts_cargo, lengthof(central_sp->accepts_cargo));
@@ -2430,12 +2431,13 @@ struct IndustryCargoesWindow : public Window {
 		int num_cust = CountMatchingAcceptingIndustries(central_sp->produced_cargo, lengthof(central_sp->produced_cargo)) + houses_accept;
 		int num_indrows = max(3, max(num_supp, num_cust)); // One is needed for the 'it' industry, and 2 for the cargo labels.
 		for (int i = 0; i < num_indrows; i++) {
-			CargoesRow *row = this->fields.Append();
-			row->columns[0].MakeEmpty(CFT_EMPTY);
-			row->columns[1].MakeCargo(central_sp->accepts_cargo, lengthof(central_sp->accepts_cargo));
-			row->columns[2].MakeEmpty(CFT_EMPTY);
-			row->columns[3].MakeCargo(central_sp->produced_cargo, lengthof(central_sp->produced_cargo));
-			row->columns[4].MakeEmpty(CFT_EMPTY);
+			/*C++17: CargoesRow &row = */ this->fields.emplace_back();
+			CargoesRow &row = this->fields.back();
+			row.columns[0].MakeEmpty(CFT_EMPTY);
+			row.columns[1].MakeCargo(central_sp->accepts_cargo, lengthof(central_sp->accepts_cargo));
+			row.columns[2].MakeEmpty(CFT_EMPTY);
+			row.columns[3].MakeCargo(central_sp->produced_cargo, lengthof(central_sp->produced_cargo));
+			row.columns[4].MakeEmpty(CFT_EMPTY);
 		}
 		/* Add central industry. */
 		int central_row = 1 + num_indrows / 2;
@@ -2493,12 +2495,13 @@ struct IndustryCargoesWindow : public Window {
 		_displayed_industries.reset();
 
 		this->fields.clear();
-		CargoesRow *row = this->fields.Append();
-		row->columns[0].MakeHeader(STR_INDUSTRY_CARGOES_PRODUCERS);
-		row->columns[1].MakeEmpty(CFT_SMALL_EMPTY);
-		row->columns[2].MakeHeader(STR_INDUSTRY_CARGOES_CUSTOMERS);
-		row->columns[3].MakeEmpty(CFT_SMALL_EMPTY);
-		row->columns[4].MakeEmpty(CFT_SMALL_EMPTY);
+		/*C++17: CargoesRow &row = */ this->fields.emplace_back();
+		CargoesRow &row = this->fields.back();
+		row.columns[0].MakeHeader(STR_INDUSTRY_CARGOES_PRODUCERS);
+		row.columns[1].MakeEmpty(CFT_SMALL_EMPTY);
+		row.columns[2].MakeHeader(STR_INDUSTRY_CARGOES_CUSTOMERS);
+		row.columns[3].MakeEmpty(CFT_SMALL_EMPTY);
+		row.columns[4].MakeEmpty(CFT_SMALL_EMPTY);
 
 		bool houses_supply = HousesCanSupply(&cid, 1);
 		bool houses_accept = HousesCanAccept(&cid, 1);
@@ -2506,12 +2509,13 @@ struct IndustryCargoesWindow : public Window {
 		int num_cust = CountMatchingAcceptingIndustries(&cid, 1) + houses_accept;
 		int num_indrows = max(num_supp, num_cust);
 		for (int i = 0; i < num_indrows; i++) {
-			CargoesRow *row = this->fields.Append();
-			row->columns[0].MakeEmpty(CFT_EMPTY);
-			row->columns[1].MakeCargo(&cid, 1);
-			row->columns[2].MakeEmpty(CFT_EMPTY);
-			row->columns[3].MakeEmpty(CFT_EMPTY);
-			row->columns[4].MakeEmpty(CFT_EMPTY);
+			/*C++17: CargoesRow &row = */ this->fields.emplace_back();
+			CargoesRow &row = this->fields.back();
+			row.columns[0].MakeEmpty(CFT_EMPTY);
+			row.columns[1].MakeCargo(&cid, 1);
+			row.columns[2].MakeEmpty(CFT_EMPTY);
+			row.columns[3].MakeEmpty(CFT_EMPTY);
+			row.columns[4].MakeEmpty(CFT_EMPTY);
 		}
 
 		this->fields[num_indrows].MakeCargoLabel(0, false); // Add cargo labels at the left bottom.
@@ -2708,7 +2712,7 @@ struct IndustryCargoesWindow : public Window {
 				DropDownList *lst = new DropDownList;
 				const CargoSpec *cs;
 				FOR_ALL_SORTED_STANDARD_CARGOSPECS(cs) {
-					*lst->Append() = new DropDownListStringItem(cs->name, cs->Index(), false);
+					lst->push_back(new DropDownListStringItem(cs->name, cs->Index(), false));
 				}
 				if (lst->size() == 0) {
 					delete lst;
@@ -2725,7 +2729,7 @@ struct IndustryCargoesWindow : public Window {
 					IndustryType ind = _sorted_industry_types[i];
 					const IndustrySpec *indsp = GetIndustrySpec(ind);
 					if (!indsp->enabled) continue;
-					*lst->Append() = new DropDownListStringItem(indsp->name, ind, false);
+					lst->push_back(new DropDownListStringItem(indsp->name, ind, false));
 				}
 				if (lst->size() == 0) {
 					delete lst;
diff --git a/src/linkgraph/linkgraph.cpp b/src/linkgraph/linkgraph.cpp
index 532792e7c..d8cbf9b50 100644
--- a/src/linkgraph/linkgraph.cpp
+++ b/src/linkgraph/linkgraph.cpp
@@ -159,7 +159,7 @@ NodeID LinkGraph::AddNode(const Station *st)
 	const GoodsEntry &good = st->goods[this->cargo];
 
 	NodeID new_node = this->Size();
-	this->nodes.Append();
+	this->nodes.emplace_back();
 	/* Avoid reducing the height of the matrix as that is expensive and we
 	 * most likely will increase it again later which is again expensive. */
 	this->edges.Resize(new_node + 1U,
diff --git a/src/music/midifile.cpp b/src/music/midifile.cpp
index fb3c187c0..82649679f 100644
--- a/src/music/midifile.cpp
+++ b/src/music/midifile.cpp
@@ -21,7 +21,6 @@
 #include "../console_func.h"
 #include "../console_internal.h"
 
-
 /* SMF reader based on description at: http://www.somascape.org/midi/tech/mfile.html */
 
 
@@ -217,7 +216,7 @@ static bool ReadTrackChunk(FILE *file, MidiFile &target)
 				case MIDIST_CONTROLLER:
 				case MIDIST_PITCHBEND:
 					/* 3 byte messages */
-					data = block->data.Append(3);
+					data = grow(block->data, 3);
 					data[0] = status;
 					if (!chunk.ReadBuffer(&data[1], 2)) {
 						return false;
@@ -226,7 +225,7 @@ static bool ReadTrackChunk(FILE *file, MidiFile &target)
 				case MIDIST_PROGCHG:
 				case MIDIST_CHANPRESS:
 					/* 2 byte messages */
-					data = block->data.Append(2);
+					data = grow(block->data, 2);
 					data[0] = status;
 					if (!chunk.ReadByte(data[1])) {
 						return false;
@@ -267,7 +266,7 @@ static bool ReadTrackChunk(FILE *file, MidiFile &target)
 			if (!chunk.ReadVariableLength(length)) {
 				return false;
 			}
-			byte *data = block->data.Append(length + 1);
+			byte *data = grow(block->data, length + 1);
 			data[0] = 0xF0;
 			if (!chunk.ReadBuffer(data + 1, length)) {
 				return false;
@@ -275,7 +274,7 @@ static bool ReadTrackChunk(FILE *file, MidiFile &target)
 			if (data[length] != 0xF7) {
 				/* Engage Casio weirdo mode - convert to normal sysex */
 				running_sysex = true;
-				*block->data.Append() = 0xF7;
+				block->data.push_back(0xF7);
 			} else {
 				running_sysex = false;
 			}
@@ -285,7 +284,7 @@ static bool ReadTrackChunk(FILE *file, MidiFile &target)
 			if (!chunk.ReadVariableLength(length)) {
 				return false;
 			}
-			byte *data = block->data.Append(length);
+			byte *data = grow(block->data, length);
 			if (!chunk.ReadBuffer(data, length)) {
 				return false;
 			}
@@ -336,7 +335,7 @@ static bool FixupMidiData(MidiFile &target)
 			merged_blocks.push_back(block);
 			last_ticktime = block.ticktime;
 		} else {
-			byte *datadest = merged_blocks.back().data.Append(block.data.size());
+			byte *datadest = grow(merged_blocks.back().data, block.data.size());
 			memcpy(datadest, block.data.Begin(), block.data.size());
 		}
 	}
@@ -508,14 +507,14 @@ struct MpsMachine {
 
 	static void AddMidiData(MidiFile::DataBlock &block, byte b1, byte b2)
 	{
-		*block.data.Append() = b1;
-		*block.data.Append() = b2;
+		block.data.push_back(b1);
+		block.data.push_back(b2);
 	}
 	static void AddMidiData(MidiFile::DataBlock &block, byte b1, byte b2, byte b3)
 	{
-		*block.data.Append() = b1;
-		*block.data.Append() = b2;
-		*block.data.Append() = b3;
+		block.data.push_back(b1);
+		block.data.push_back(b2);
+		block.data.push_back(b3);
 	}
 
 	/**
diff --git a/src/network/core/host.cpp b/src/network/core/host.cpp
index c0365742b..1ea5389d4 100644
--- a/src/network/core/host.cpp
+++ b/src/network/core/host.cpp
@@ -100,7 +100,7 @@ static void NetworkFindBroadcastIPsInternal(NetworkAddressList *broadcast) // GE
 		if (ifa->ifa_broadaddr->sa_family != AF_INET) continue;
 
 		NetworkAddress addr(ifa->ifa_broadaddr, sizeof(sockaddr));
-		if (std::none_of(broadcast->begin(), broadcast->end(), [&addr](NetworkAddress const& elem) -> bool { return elem == addr; })) *broadcast->Append() = addr;
+		if (std::none_of(broadcast->begin(), broadcast->end(), [&addr](NetworkAddress const& elem) -> bool { return elem == addr; })) broadcast->push_back(addr);
 	}
 	freeifaddrs(ifap);
 }
diff --git a/src/network/core/tcp_connect.cpp b/src/network/core/tcp_connect.cpp
index 470d97e68..f3dc2cb9a 100644
--- a/src/network/core/tcp_connect.cpp
+++ b/src/network/core/tcp_connect.cpp
@@ -32,7 +32,7 @@ TCPConnecter::TCPConnecter(const NetworkAddress &address) :
 	sock(INVALID_SOCKET),
 	address(address)
 {
-	*_tcp_connecters.Append() = this;
+	_tcp_connecters.push_back(this);
 	if (!ThreadObject::New(TCPConnecter::ThreadEntry, this, &this->thread, "ottd:tcp")) {
 		this->Connect();
 	}
diff --git a/src/network/core/tcp_http.cpp b/src/network/core/tcp_http.cpp
index 2d3e89b4e..abec3fbc8 100644
--- a/src/network/core/tcp_http.cpp
+++ b/src/network/core/tcp_http.cpp
@@ -63,7 +63,7 @@ NetworkHTTPSocketHandler::NetworkHTTPSocketHandler(SOCKET s,
 		return;
 	}
 
-	*_http_connections.Append() = this;
+	_http_connections.push_back(this);
 }
 
 /** Free whatever needs to be freed. */
diff --git a/src/network/core/udp.cpp b/src/network/core/udp.cpp
index db655c0cf..7babf78d6 100644
--- a/src/network/core/udp.cpp
+++ b/src/network/core/udp.cpp
@@ -26,14 +26,14 @@ NetworkUDPSocketHandler::NetworkUDPSocketHandler(NetworkAddressList *bind)
 {
 	if (bind != NULL) {
 		for (NetworkAddress *addr = bind->Begin(); addr != bind->End(); addr++) {
-			*this->bind.Append() = *addr;
+			this->bind.push_back(*addr);
 		}
 	} else {
 		/* As hostname NULL and port 0/NULL don't go well when
 		 * resolving it we need to add an address for each of
 		 * the address families we support. */
-		*this->bind.Append() = NetworkAddress(NULL, 0, AF_INET);
-		*this->bind.Append() = NetworkAddress(NULL, 0, AF_INET6);
+		this->bind.emplace_back(nullptr, 0, AF_INET);
+		this->bind.emplace_back(nullptr, 0, AF_INET6);
 	}
 }
 
diff --git a/src/network/network.cpp b/src/network/network.cpp
index 3780258bd..1ddd7478c 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -633,12 +633,12 @@ void NetworkAddServer(const char *b)
 void GetBindAddresses(NetworkAddressList *addresses, uint16 port)
 {
 	for (char **iter = _network_bind_list.Begin(); iter != _network_bind_list.End(); iter++) {
-		*addresses->Append() = NetworkAddress(*iter, port);
+		addresses->emplace_back(*iter, port);
 	}
 
 	/* No address, so bind to everything. */
 	if (addresses->size() == 0) {
-		*addresses->Append() = NetworkAddress("", port);
+		addresses->emplace_back("", port);
 	}
 }
 
@@ -650,7 +650,7 @@ void NetworkRebuildHostList()
 	_network_host_list.Clear();
 
 	for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
-		if (item->manually) *_network_host_list.Append() = stredup(item->address.GetAddressAsString(false));
+		if (item->manually) _network_host_list.push_back(stredup(item->address.GetAddressAsString(false)));
 	}
 }
 
diff --git a/src/network/network_client.cpp b/src/network/network_client.cpp
index a99a5069a..fff4dd328 100644
--- a/src/network/network_client.cpp
+++ b/src/network/network_client.cpp
@@ -77,7 +77,7 @@ struct PacketReader : LoadFilter {
 		/* Allocate a new chunk and add the remaining data. */
 		pbuf += to_write;
 		to_write   = in_packet - to_write;
-		this->buf  = *this->blocks.Append() = CallocT<byte>(CHUNK);
+		this->blocks.push_back(this->buf = CallocT<byte>(CHUNK));
 		this->bufe = this->buf + CHUNK;
 
 		memcpy(this->buf, pbuf, to_write);
diff --git a/src/network/network_content.cpp b/src/network/network_content.cpp
index 54798f4b7..fe7905de8 100644
--- a/src/network/network_content.cpp
+++ b/src/network/network_content.cpp
@@ -165,7 +165,7 @@ bool ClientNetworkContentSocketHandler::Receive_SERVER_INFO(Packet *p)
 		return true;
 	}
 
-	*this->infos.Append() = ci;
+	this->infos.push_back(ci);
 
 	/* Incoming data means that we might need to reconsider dependencies */
 	for (ContentIterator iter = this->infos.Begin(); iter != this->infos.End(); iter++) {
@@ -278,7 +278,7 @@ void ClientNetworkContentSocketHandler::RequestContentList(ContentVector *cv, bo
 			}
 		}
 		if (!found) {
-			*this->infos.Append() = ci;
+			this->infos.push_back(ci);
 		} else {
 			delete ci;
 		}
@@ -300,7 +300,7 @@ void ClientNetworkContentSocketHandler::DownloadSelectedContent(uint &files, uin
 		const ContentInfo *ci = *iter;
 		if (!ci->IsSelected() || ci->state == ContentInfo::ALREADY_HERE) continue;
 
-		*content.Append() = ci->id;
+		content.push_back(ci->id);
 		bytes += ci->filesize;
 	}
 
@@ -579,11 +579,11 @@ void ClientNetworkContentSocketHandler::OnReceiveData(const char *data, size_t l
 	if (this->http_response_index == -1) {
 		if (data != NULL) {
 			/* Append the rest of the response. */
-			memcpy(this->http_response.Append((uint)length), data, length);
+			memcpy(grow(this->http_response, (uint)length), data, length);
 			return;
 		} else {
 			/* Make sure the response is properly terminated. */
-			*this->http_response.Append() = '\0';
+			this->http_response.push_back('\0');
 
 			/* And prepare for receiving the rest of the data. */
 			this->http_response_index = 0;
@@ -905,7 +905,7 @@ void ClientNetworkContentSocketHandler::ReverseLookupDependency(ConstContentVect
 
 		for (uint i = 0; i < ci->dependency_count; i++) {
 			if (ci->dependencies[i] == child->id) {
-				*parents.Append() = ci;
+				parents.push_back(ci);
 				break;
 			}
 		}
@@ -919,7 +919,7 @@ void ClientNetworkContentSocketHandler::ReverseLookupDependency(ConstContentVect
  */
 void ClientNetworkContentSocketHandler::ReverseLookupTreeDependency(ConstContentVector &tree, const ContentInfo *child) const
 {
-	*tree.Append() = child;
+	tree.push_back(child);
 
 	/* First find all direct parents. We can't use the "normal" iterator as
 	 * we are including stuff into the vector and as such the vector's data
diff --git a/src/network/network_content_gui.cpp b/src/network/network_content_gui.cpp
index 109e63c95..19c075258 100644
--- a/src/network/network_content_gui.cpp
+++ b/src/network/network_content_gui.cpp
@@ -391,7 +391,7 @@ class NetworkContentListWindow : public Window, ContentCallback {
 
 		for (ConstContentIterator iter = _network_content_client.Begin(); iter != _network_content_client.End(); iter++) {
 			if ((*iter)->state == ContentInfo::DOES_NOT_EXIST) all_available = false;
-			*this->content.Append() = *iter;
+			this->content.push_back(*iter);
 		}
 
 		this->SetWidgetDisabledState(WID_NCL_SEARCH_EXTERNAL, this->auto_select && all_available);
diff --git a/src/network/network_gui.cpp b/src/network/network_gui.cpp
index e3c4555bf..7b65f6b0c 100644
--- a/src/network/network_gui.cpp
+++ b/src/network/network_gui.cpp
@@ -253,7 +253,7 @@ protected:
 		this->servers.clear();
 
 		for (NetworkGameList *ngl = _network_game_list; ngl != NULL; ngl = ngl->next) {
-			*this->servers.Append() = ngl;
+			this->servers.push_back(ngl);
 		}
 
 		/* Apply the filter condition immediately, if a search string has been provided. */
@@ -1737,9 +1737,7 @@ struct NetworkClientListPopupWindow : Window {
 	 */
 	inline void AddAction(StringID name, ClientList_Action_Proc *proc)
 	{
-		ClientListAction *action = this->actions.Append();
-		action->name = name;
-		action->proc = proc;
+		this->actions.push_back({name, proc});
 	}
 
 	NetworkClientListPopupWindow(WindowDesc *desc, int x, int y, ClientID client_id) :
diff --git a/src/network/network_server.cpp b/src/network/network_server.cpp
index 67f4c6fd9..8a1e75d2f 100644
--- a/src/network/network_server.cpp
+++ b/src/network/network_server.cpp
@@ -2101,7 +2101,7 @@ uint NetworkServerKickOrBanIP(const char *ip, bool ban)
 				break;
 			}
 		}
-		if (!contains) *_network_ban_list.Append() = stredup(ip);
+		if (!contains) _network_ban_list.push_back(stredup(ip));
 	}
 
 	uint n = 0;
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 6ff991441..63296593d 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -472,10 +472,7 @@ static StringIDMappingVector _string_to_grf_mapping;
 static void AddStringForMapping(StringID source, StringID *target)
 {
 	*target = STR_UNDEFINED;
-	StringIDMapping *item = _string_to_grf_mapping.Append();
-	item->grfid = _cur.grffile->grfid;
-	item->source = source;
-	item->target = target;
+	_string_to_grf_mapping.push_back({_cur.grffile->grfid, source, target});
 }
 
 /**
@@ -659,11 +656,12 @@ static Engine *GetNewEngine(const GRFFile *file, VehicleType type, uint16 intern
 
 	/* Reserve the engine slot */
 	assert(_engine_mngr.size() == e->index);
-	EngineIDMapping *eid = _engine_mngr.Append();
-	eid->type            = type;
-	eid->grfid           = scope_grfid; // Note: this is INVALID_GRFID if dynamic_engines is disabled, so no reservation
-	eid->internal_id     = internal_id;
-	eid->substitute_id   = min(internal_id, _engine_counts[type]); // substitute_id == _engine_counts[subtype] means "no substitute"
+	_engine_mngr.push_back({
+			scope_grfid, // Note: this is INVALID_GRFID if dynamic_engines is disabled, so no reservation
+			internal_id,
+			{static_cast<byte>(type)},
+			static_cast<uint8>(min(internal_id, _engine_counts[type])) // substitute_id == _engine_counts[subtype] means "no substitute"
+	});
 
 	if (engine_pool_size != Engine::GetPoolSize()) {
 		/* Resize temporary engine data ... */
@@ -1909,18 +1907,19 @@ static ChangeInfoResult StationChangeInfo(uint stid, int numinfo, int prop, Byte
 					tmp_layout.clear();
 					for (;;) {
 						/* no relative bounding box support */
-						DrawTileSeqStruct *dtss = tmp_layout.Append();
-						MemSetT(dtss, 0);
-
-						dtss->delta_x = buf->ReadByte();
-						if (dtss->IsTerminator()) break;
-						dtss->delta_y = buf->ReadByte();
-						dtss->delta_z = buf->ReadByte();
-						dtss->size_x = buf->ReadByte();
-						dtss->size_y = buf->ReadByte();
-						dtss->size_z = buf->ReadByte();
-
-						ReadSpriteLayoutSprite(buf, false, true, false, GSF_STATIONS, &dtss->image);
+						/*C++17: DrawTileSeqStruct &dtss = */ tmp_layout.emplace_back();
+						DrawTileSeqStruct &dtss = tmp_layout.back();
+						MemSetT(&dtss, 0);
+
+						dtss.delta_x = buf->ReadByte();
+						if (dtss.IsTerminator()) break;
+						dtss.delta_y = buf->ReadByte();
+						dtss.delta_z = buf->ReadByte();
+						dtss.size_x = buf->ReadByte();
+						dtss.size_y = buf->ReadByte();
+						dtss.size_z = buf->ReadByte();
+
+						ReadSpriteLayoutSprite(buf, false, true, false, GSF_STATIONS, &dtss.image);
 						/* On error, bail out immediately. Temporary GRF data was already freed */
 						if (_cur.skip_sprites < 0) return CIR_DISABLED;
 					}
@@ -2594,7 +2593,7 @@ static ChangeInfoResult LoadTranslationTable(uint gvid, int numinfo, ByteReader
 	translation_table.clear();
 	for (int i = 0; i < numinfo; i++) {
 		uint32 item = buf->ReadDWord();
-		*translation_table.Append() = BSWAP32(item);
+		translation_table.push_back(BSWAP32(item));
 	}
 
 	return CIR_SUCCESS;
@@ -2799,14 +2798,14 @@ static ChangeInfoResult GlobalVarChangeInfo(uint gvid, int numinfo, int prop, By
 						if (map.openttd_id >= MAX_NUM_GENDERS) {
 							grfmsg(1, "GlobalVarChangeInfo: Gender name %s is not known, ignoring", name);
 						} else {
-							*_cur.grffile->language_map[curidx].gender_map.Append() = map;
+							_cur.grffile->language_map[curidx].gender_map.push_back(map);
 						}
 					} else {
 						map.openttd_id = lang->GetCaseIndex(name);
 						if (map.openttd_id >= MAX_NUM_CASES) {
 							grfmsg(1, "GlobalVarChangeInfo: Case name %s is not known, ignoring", name);
 						} else {
-							*_cur.grffile->language_map[curidx].case_map.Append() = map;
+							_cur.grffile->language_map[curidx].case_map.push_back(map);
 						}
 					}
 					newgrf_id = buf->ReadByte();
@@ -4335,7 +4334,7 @@ static ChangeInfoResult RailTypeReserveInfo(uint id, int numinfo, int prop, Byte
 				if (_cur.grffile->railtype_map[id + i] != INVALID_RAILTYPE) {
 					int n = buf->ReadByte();
 					for (int j = 0; j != n; j++) {
-						*_railtypes[_cur.grffile->railtype_map[id + i]].alternate_labels.Append() = BSWAP32(buf->ReadDWord());
+						_railtypes[_cur.grffile->railtype_map[id + i]].alternate_labels.push_back(BSWAP32(buf->ReadDWord()));
 					}
 					break;
 				}
@@ -4796,29 +4795,30 @@ static void NewSpriteGroup(ByteReader *buf)
 			/* Loop through the var adjusts. Unfortunately we don't know how many we have
 			 * from the outset, so we shall have to keep reallocing. */
 			do {
-				DeterministicSpriteGroupAdjust *adjust = adjusts.Append();
+				/*C++17: DeterministicSpriteGroupAdjust &adjust = */ adjusts.emplace_back();
+				DeterministicSpriteGroupAdjust &adjust = adjusts.back();
 
 				/* The first var adjust doesn't have an operation specified, so we set it to add. */
-				adjust->operation = adjusts.size() == 1 ? DSGA_OP_ADD : (DeterministicSpriteGroupAdjustOperation)buf->ReadByte();
-				adjust->variable  = buf->ReadByte();
-				if (adjust->variable == 0x7E) {
+				adjust.operation = adjusts.size() == 1 ? DSGA_OP_ADD : (DeterministicSpriteGroupAdjustOperation)buf->ReadByte();
+				adjust.variable  = buf->ReadByte();
+				if (adjust.variable == 0x7E) {
 					/* Link subroutine group */
-					adjust->subroutine = GetGroupFromGroupID(setid, type, buf->ReadByte());
+					adjust.subroutine = GetGroupFromGroupID(setid, type, buf->ReadByte());
 				} else {
-					adjust->parameter = IsInsideMM(adjust->variable, 0x60, 0x80) ? buf->ReadByte() : 0;
+					adjust.parameter = IsInsideMM(adjust.variable, 0x60, 0x80) ? buf->ReadByte() : 0;
 				}
 
 				varadjust = buf->ReadByte();
-				adjust->shift_num = GB(varadjust, 0, 5);
-				adjust->type      = (DeterministicSpriteGroupAdjustType)GB(varadjust, 6, 2);
-				adjust->and_mask  = buf->ReadVarSize(varsize);
+				adjust.shift_num = GB(varadjust, 0, 5);
+				adjust.type      = (DeterministicSpriteGroupAdjustType)GB(varadjust, 6, 2);
+				adjust.and_mask  = buf->ReadVarSize(varsize);
 
-				if (adjust->type != DSGA_TYPE_NONE) {
-					adjust->add_val    = buf->ReadVarSize(varsize);
-					adjust->divmod_val = buf->ReadVarSize(varsize);
+				if (adjust.type != DSGA_TYPE_NONE) {
+					adjust.add_val    = buf->ReadVarSize(varsize);
+					adjust.divmod_val = buf->ReadVarSize(varsize);
 				} else {
-					adjust->add_val    = 0;
-					adjust->divmod_val = 0;
+					adjust.add_val    = 0;
+					adjust.divmod_val = 0;
 				}
 
 				/* Continue reading var adjusts while bit 5 is set. */
@@ -7851,9 +7851,7 @@ static bool HandleParameterInfo(ByteReader *buf)
 		}
 
 		if (id >= _cur.grfconfig->param_info.size()) {
-			uint num_to_add = id - _cur.grfconfig->param_info.size() + 1;
-			GRFParameterInfo **newdata = _cur.grfconfig->param_info.Append(num_to_add);
-			MemSetT<GRFParameterInfo *>(newdata, 0, num_to_add);
+			_cur.grfconfig->param_info.resize(id + 1);
 		}
 		if (_cur.grfconfig->param_info[id] == NULL) {
 			_cur.grfconfig->param_info[id] = new GRFParameterInfo(id);
@@ -8405,7 +8403,7 @@ static void InitNewGRFFile(const GRFConfig *config)
 	}
 
 	newfile = new GRFFile(config);
-	*_grf_files.Append() = _cur.grffile = newfile;
+	_grf_files.push_back(_cur.grffile = newfile);
 }
 
 /**
diff --git a/src/newgrf_commons.cpp b/src/newgrf_commons.cpp
index e25f6d085..e201ca736 100644
--- a/src/newgrf_commons.cpp
+++ b/src/newgrf_commons.cpp
@@ -666,7 +666,8 @@ uint32 NewGRFSpriteLayout::PrepareLayout(uint32 orig_offset, uint32 newgrf_groun
 
 	/* Create a copy of the spritelayout, so we can modify some values.
 	 * Also include the groundsprite into the sequence for easier processing. */
-	DrawTileSeqStruct *result = result_seq.Append();
+	/*C++17: DrawTileSeqStruct *result = &*/ result_seq.emplace_back();
+	DrawTileSeqStruct *result = &result_seq.back();
 	result->image = ground;
 	result->delta_x = 0;
 	result->delta_y = 0;
@@ -674,10 +675,10 @@ uint32 NewGRFSpriteLayout::PrepareLayout(uint32 orig_offset, uint32 newgrf_groun
 
 	const DrawTileSeqStruct *dtss;
 	foreach_draw_tile_seq(dtss, this->seq) {
-		*result_seq.Append() = *dtss;
+		result_seq.push_back(*dtss);
 	}
-	result_seq.Append()->MakeTerminator();
-
+	result_seq.emplace_back() /*C++17: .MakeTerminator()*/;
+	result_seq.back().MakeTerminator();
 	/* Determine the var10 values the action-1-2-3 chains needs to be resolved for,
 	 * and apply the default sprite offsets (unless disabled). */
 	const TileLayoutRegisters *regs = this->registers;
diff --git a/src/newgrf_config.cpp b/src/newgrf_config.cpp
index 730207c6b..698084115 100644
--- a/src/newgrf_config.cpp
+++ b/src/newgrf_config.cpp
@@ -85,9 +85,9 @@ GRFConfig::GRFConfig(const GRFConfig &config) :
 	if (config.error != NULL) this->error = new GRFError(*config.error);
 	for (uint i = 0; i < config.param_info.size(); i++) {
 		if (config.param_info[i] == NULL) {
-			*this->param_info.Append() = NULL;
+			this->param_info.push_back(NULL);
 		} else {
-			*this->param_info.Append() = new GRFParameterInfo(*config.param_info[i]);
+			this->param_info.push_back(new GRFParameterInfo(*config.param_info[i]));
 		}
 	}
 }
@@ -611,9 +611,9 @@ compatible_grf:
 				c->has_param_defaults = f->has_param_defaults;
 				for (uint i = 0; i < f->param_info.size(); i++) {
 					if (f->param_info[i] == NULL) {
-						*c->param_info.Append() = NULL;
+						c->param_info.push_back(NULL);
 					} else {
-						*c->param_info.Append() = new GRFParameterInfo(*f->param_info[i]);
+						c->param_info.push_back(new GRFParameterInfo(*f->param_info[i]));
 					}
 				}
 			}
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
index 07e0f8af7..b2dd4d1a3 100644
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -1196,9 +1196,7 @@ static SmallVector<ListOrderChange, 16> _list_order_changes;
 void AlterVehicleListOrder(EngineID engine, uint target)
 {
 	/* Add the list order change to a queue */
-	ListOrderChange *loc = _list_order_changes.Append();
-	loc->engine = engine;
-	loc->target = target;
+	_list_order_changes.push_back({engine, target});
 }
 
 /**
@@ -1231,7 +1229,7 @@ void CommitVehicleListOrderChanges()
 	SmallVector<EngineID, 16> ordering;
 	Engine *e;
 	FOR_ALL_ENGINES(e) {
-		*ordering.Append() = e->index;
+		ordering.push_back(e->index);
 	}
 	QSortT(ordering.Begin(), ordering.size(), EnginePreSort);
 
diff --git a/src/newgrf_gui.cpp b/src/newgrf_gui.cpp
index fb712700c..0db38e297 100644
--- a/src/newgrf_gui.cpp
+++ b/src/newgrf_gui.cpp
@@ -378,7 +378,7 @@ struct NewGRFParametersWindow : public Window {
 
 							DropDownList *list = new DropDownList();
 							for (uint32 i = par_info->min_value; i <= par_info->max_value; i++) {
-								*list->Append() = new DropDownListCharStringItem(GetGRFStringFromGRFText(par_info->value_names.Find(i)->second), i, false);
+								list->push_back(new DropDownListCharStringItem(GetGRFStringFromGRFText(par_info->value_names.Find(i)->second), i, false));
 							}
 
 							ShowDropDownListAt(this, list, old_val, -1, wi_rect, COLOUR_ORANGE, true);
@@ -927,11 +927,11 @@ struct NewGRFWindow : public Window, NewGRFScanCallback {
 				DropDownList *list = new DropDownList();
 
 				/* Add 'None' option for clearing list */
-				*list->Append() = new DropDownListStringItem(STR_NONE, -1, false);
+				list->push_back(new DropDownListStringItem(STR_NONE, -1, false));
 
 				for (uint i = 0; i < _grf_preset_list.size(); i++) {
 					if (_grf_preset_list[i] != NULL) {
-						*list->Append() = new DropDownListCharStringItem(_grf_preset_list[i], i, false);
+						list->push_back(new DropDownListCharStringItem(_grf_preset_list[i], i, false));
 					}
 				}
 
@@ -1464,7 +1464,7 @@ private:
 			if (found) continue;
 
 			if (_settings_client.gui.newgrf_show_old_versions) {
-				*this->avails.Append() = c;
+				this->avails.push_back(c);
 			} else {
 				const GRFConfig *best = FindGRFConfig(c->ident.grfid, HasBit(c->flags, GCF_INVALID) ? FGCM_NEWEST : FGCM_NEWEST_VALID);
 				/*
@@ -1475,7 +1475,7 @@ private:
 				 * show that NewGRF!.
 				 */
 				if (best->version == 0 || best->ident.HasGrfIdentifier(c->ident.grfid, c->ident.md5sum)) {
-					*this->avails.Append() = c;
+					this->avails.push_back(c);
 				}
 			}
 		}
@@ -1558,7 +1558,7 @@ void ShowMissingContentWindow(const GRFConfig *list)
 		strecpy(ci->name, c->GetName(), lastof(ci->name));
 		ci->unique_id = BSWAP32(c->ident.grfid);
 		memcpy(ci->md5sum, HasBit(c->flags, GCF_COMPATIBLE) ? c->original_md5sum : c->ident.md5sum, sizeof(ci->md5sum));
-		*cv.Append() = ci;
+		cv.push_back(ci);
 	}
 	ShowNetworkContentListWindow(cv.size() == 0 ? NULL : &cv, CONTENT_TYPE_NEWGRF);
 }
diff --git a/src/newgrf_sound.cpp b/src/newgrf_sound.cpp
index dfe7e403e..e9f1163c6 100644
--- a/src/newgrf_sound.cpp
+++ b/src/newgrf_sound.cpp
@@ -32,7 +32,7 @@ static SmallVector<SoundEntry, 8> _sounds;
  */
 SoundEntry *AllocateSound(uint num)
 {
-	SoundEntry *sound = _sounds.Append(num);
+	SoundEntry *sound = grow(_sounds, num);
 	MemSetT(sound, 0, num);
 	return sound;
 }
diff --git a/src/object_cmd.cpp b/src/object_cmd.cpp
index 0b18dd4b1..287a146f3 100644
--- a/src/object_cmd.cpp
+++ b/src/object_cmd.cpp
@@ -530,9 +530,7 @@ static CommandCost ClearTile_Object(TileIndex tile, DoCommandFlag flags)
 			break;
 	}
 
-	ClearedObjectArea *cleared_area = _cleared_object_areas.Append();
-	cleared_area->first_tile = tile;
-	cleared_area->area = ta;
+	_cleared_object_areas.push_back({tile, ta});
 
 	if (flags & DC_EXEC) ReallyClearObjectTile(o);
 
diff --git a/src/openttd.cpp b/src/openttd.cpp
index 5478ec5a2..5c7af2dfc 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -445,7 +445,7 @@ struct AfterNewGRFScan : NewGRFScanCallback {
 
 		if (dedicated_host != NULL) {
 			_network_bind_list.Clear();
-			*_network_bind_list.Append() = stredup(dedicated_host);
+			_network_bind_list.push_back(stredup(dedicated_host));
 		}
 		if (dedicated_port != 0) _settings_client.network.server_port = dedicated_port;
 
@@ -1177,7 +1177,7 @@ static void CheckCaches()
 	SmallVector<TownCache, 4> old_town_caches;
 	Town *t;
 	FOR_ALL_TOWNS(t) {
-		MemCpyT(old_town_caches.Append(), &t->cache);
+		old_town_caches.push_back(t->cache);
 	}
 
 	extern void RebuildTownCaches();
@@ -1195,7 +1195,7 @@ static void CheckCaches()
 	/* Check company infrastructure cache. */
 	SmallVector<CompanyInfrastructure, 4> old_infrastructure;
 	Company *c;
-	FOR_ALL_COMPANIES(c) MemCpyT(old_infrastructure.Append(), &c->infrastructure);
+	FOR_ALL_COMPANIES(c) old_infrastructure.push_back(c->infrastructure);
 
 	extern void AfterLoadCompanyStats();
 	AfterLoadCompanyStats();
diff --git a/src/order_gui.cpp b/src/order_gui.cpp
index 612c1ba81..0b1ee2ae6 100644
--- a/src/order_gui.cpp
+++ b/src/order_gui.cpp
@@ -1297,7 +1297,7 @@ public:
 			case WID_O_COND_VARIABLE: {
 				DropDownList *list = new DropDownList();
 				for (uint i = 0; i < lengthof(_order_conditional_variable); i++) {
-					*list->Append() = new DropDownListStringItem(STR_ORDER_CONDITIONAL_LOAD_PERCENTAGE + _order_conditional_variable[i], _order_conditional_variable[i], false);
+					list->push_back(new DropDownListStringItem(STR_ORDER_CONDITIONAL_LOAD_PERCENTAGE + _order_conditional_variable[i], _order_conditional_variable[i], false));
 				}
 				ShowDropDownList(this, list, this->vehicle->GetOrder(this->OrderGetSel())->GetConditionVariable(), WID_O_COND_VARIABLE);
 				break;
diff --git a/src/os/macosx/string_osx.cpp b/src/os/macosx/string_osx.cpp
index 261885187..136542cc1 100644
--- a/src/os/macosx/string_osx.cpp
+++ b/src/os/macosx/string_osx.cpp
@@ -78,7 +78,7 @@ public:
 				FontMap::const_iterator map = fontMapping.Begin();
 				while (map < fontMapping.End() - 1 && map->first <= chars.location) map++;
 
-				*this->Append() = new CoreTextVisualRun(run, map->second, buff);
+				this->push_back(new CoreTextVisualRun(run, map->second, buff));
 			}
 			CFRelease(line);
 		}
diff --git a/src/rail_cmd.cpp b/src/rail_cmd.cpp
index 17df27fc5..3a24fb65f 100644
--- a/src/rail_cmd.cpp
+++ b/src/rail_cmd.cpp
@@ -1623,7 +1623,7 @@ CommandCost CmdConvertRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
 					if (v != NULL && !HasPowerOnRail(v->railtype, totype)) {
 						/* No power on new rail type, reroute. */
 						FreeTrainTrackReservation(v);
-						*vehicles_affected.Append() = v;
+						vehicles_affected.push_back(v);
 					}
 				}
 
@@ -1705,7 +1705,7 @@ CommandCost CmdConvertRail(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
 						if (v != NULL && !HasPowerOnRail(v->railtype, totype)) {
 							/* No power on new rail type, reroute. */
 							FreeTrainTrackReservation(v);
-							*vehicles_affected.Append() = v;
+							vehicles_affected.push_back(v);
 						}
 					}
 
diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
index a26cc9902..827f24456 100644
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -2007,7 +2007,7 @@ DropDownList *GetRailTypeDropDownList(bool for_replacement, bool all_option)
 
 	if (all_option) {
 		DropDownListStringItem *item = new DropDownListStringItem(STR_REPLACE_ALL_RAILTYPE, INVALID_RAILTYPE, false);
-		*list->Append() = item;
+		list->push_back(item);
 	}
 
 	Dimension d = { 0, 0 };
@@ -2038,7 +2038,7 @@ DropDownList *GetRailTypeDropDownList(bool for_replacement, bool all_option)
 		}
 		item->SetParam(0, rti->strings.menu_text);
 		item->SetParam(1, rti->max_speed);
-		*list->Append() = item;
+		list->push_back(item);
 	}
 	return list;
 }
diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
index 851eb6a78..43a415c20 100644
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -2954,24 +2954,24 @@ bool AfterLoadGame()
 					cur_skip = prev_tile_skip;
 				}
 
-				uint *this_skip = skip_frames.Append();
-				*this_skip = prev_tile_skip;
+				/*C++17: uint &this_skip = */ skip_frames.push_back(prev_tile_skip);
+				uint &this_skip = skip_frames.back();
 
 				/* The following 3 curves now take longer than before */
 				switch (u->state) {
 					case 2:
 						cur_skip++;
-						if (u->frame <= (roadside ? 9 : 5)) *this_skip = cur_skip;
+						if (u->frame <= (roadside ? 9 : 5)) this_skip = cur_skip;
 						break;
 
 					case 4:
 						cur_skip++;
-						if (u->frame <= (roadside ? 5 : 9)) *this_skip = cur_skip;
+						if (u->frame <= (roadside ? 5 : 9)) this_skip = cur_skip;
 						break;
 
 					case 5:
 						cur_skip++;
-						if (u->frame <= (roadside ? 4 : 2)) *this_skip = cur_skip;
+						if (u->frame <= (roadside ? 4 : 2)) this_skip = cur_skip;
 						break;
 
 					default:
diff --git a/src/saveload/animated_tile_sl.cpp b/src/saveload/animated_tile_sl.cpp
index 36571c418..5b9185263 100644
--- a/src/saveload/animated_tile_sl.cpp
+++ b/src/saveload/animated_tile_sl.cpp
@@ -42,14 +42,14 @@ static void Load_ANIT()
 
 		for (int i = 0; i < 256; i++) {
 			if (anim_list[i] == 0) break;
-			*_animated_tiles.Append() = anim_list[i];
+			_animated_tiles.push_back(anim_list[i]);
 		}
 		return;
 	}
 
 	uint count = (uint)SlGetFieldLength() / sizeof(*_animated_tiles.Begin());
 	_animated_tiles.clear();
-	_animated_tiles.Append(count);
+	_animated_tiles.resize(_animated_tiles.size() + count);
 	SlArray(_animated_tiles.Begin(), count, SLE_UINT32);
 }
 
diff --git a/src/saveload/engine_sl.cpp b/src/saveload/engine_sl.cpp
index 87b18336c..03a086a15 100644
--- a/src/saveload/engine_sl.cpp
+++ b/src/saveload/engine_sl.cpp
@@ -190,7 +190,8 @@ static void Load_EIDS()
 	_engine_mngr.clear();
 
 	while (SlIterateArray() != -1) {
-		EngineIDMapping *eid = _engine_mngr.Append();
+		/*C++17: EngineIDMapping *eid = &*/ _engine_mngr.emplace_back();
+		EngineIDMapping *eid = &_engine_mngr.back();
 		SlObject(eid, _engine_id_mapping_desc);
 	}
 }
diff --git a/src/saveload/game_sl.cpp b/src/saveload/game_sl.cpp
index ff48ab135..cffff5018 100644
--- a/src/saveload/game_sl.cpp
+++ b/src/saveload/game_sl.cpp
@@ -153,10 +153,10 @@ static void Load_GSTR()
 		LanguageStrings *ls = new LanguageStrings(_game_saveload_string != NULL ? _game_saveload_string : "");
 		for (uint i = 0; i < _game_saveload_strings; i++) {
 			SlObject(NULL, _game_language_string);
-			*ls->lines.Append() = stredup(_game_saveload_string != NULL ? _game_saveload_string : "");
+			ls->lines.push_back(stredup(_game_saveload_string != NULL ? _game_saveload_string : ""));
 		}
 
-		*_current_data->raw_strings.Append() = ls;
+		_current_data->raw_strings.push_back(ls);
 	}
 
 	/* If there were no strings in the savegame, set GameStrings to NULL */
diff --git a/src/saveload/labelmaps_sl.cpp b/src/saveload/labelmaps_sl.cpp
index a25abe722..3d930e768 100644
--- a/src/saveload/labelmaps_sl.cpp
+++ b/src/saveload/labelmaps_sl.cpp
@@ -48,7 +48,7 @@ void AfterLoadLabelMaps()
 			RailType r = GetRailTypeByLabel(_railtype_list[i]);
 			if (r == INVALID_RAILTYPE) r = RAILTYPE_BEGIN;
 
-			*railtype_conversion_map.Append() = r;
+			railtype_conversion_map.push_back(r);
 		}
 
 		for (TileIndex t = 0; t < MapSize(); t++) {
@@ -114,7 +114,7 @@ static void Load_RAIL()
 
 	while (SlIterateArray() != -1) {
 		SlObject(&lo, _label_object_desc);
-		*_railtype_list.Append() = (RailTypeLabel)lo.label;
+		_railtype_list.push_back((RailTypeLabel)lo.label);
 	}
 }
 
diff --git a/src/saveload/linkgraph_sl.cpp b/src/saveload/linkgraph_sl.cpp
index 1ff247042..842ad6d42 100644
--- a/src/saveload/linkgraph_sl.cpp
+++ b/src/saveload/linkgraph_sl.cpp
@@ -69,7 +69,7 @@ const SaveLoad *GetLinkGraphJobDesc()
 				char *&address = reinterpret_cast<char *&>(sl.address);
 				address -= offset_gamesettings;
 				address += offset_component;
-				*(saveloads.Append()) = sl;
+				saveloads.push_back(sl);
 			}
 			desc = GetSettingDescription(++setting);
 		}
@@ -82,7 +82,7 @@ const SaveLoad *GetLinkGraphJobDesc()
 
 		int i = 0;
 		do {
-			*(saveloads.Append()) = job_desc[i++];
+			saveloads.push_back(job_desc[i++]);
 		} while (saveloads[saveloads.size() - 1].cmd != SL_END);
 	}
 
diff --git a/src/saveload/oldloader_sl.cpp b/src/saveload/oldloader_sl.cpp
index 1974bb31f..7b445858e 100644
--- a/src/saveload/oldloader_sl.cpp
+++ b/src/saveload/oldloader_sl.cpp
@@ -651,7 +651,7 @@ static bool LoadOldAnimTileList(LoadgameState *ls, int num)
 	/* The first zero in the loaded array indicates the end of the list. */
 	for (int i = 0; i < 256; i++) {
 		if (anim_list[i] == 0) break;
-		*_animated_tiles.Append() = anim_list[i];
+		_animated_tiles.push_back(anim_list[i]);
 	}
 
 	return true;
diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index 2aa19af81..ee4876fd5 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -143,7 +143,7 @@ struct MemoryDumper {
 		/* Are we at the end of this chunk? */
 		if (this->buf == this->bufe) {
 			this->buf = CallocT<byte>(MEMORY_CHUNK_SIZE);
-			*this->blocks.Append() = this->buf;
+			this->blocks.push_back(this->buf);
 			this->bufe = this->buf + MEMORY_CHUNK_SIZE;
 		}
 
diff --git a/src/saveload/waypoint_sl.cpp b/src/saveload/waypoint_sl.cpp
index 47d0c5ab3..9e5d16396 100644
--- a/src/saveload/waypoint_sl.cpp
+++ b/src/saveload/waypoint_sl.cpp
@@ -178,7 +178,8 @@ static void Load_WAYP()
 	int index;
 
 	while ((index = SlIterateArray()) != -1) {
-		OldWaypoint *wp = _old_waypoints.Append();
+		/*C++17: OldWaypoint *wp = &*/ _old_waypoints.emplace_back();
+		OldWaypoint *wp = &_old_waypoints.back();
 		memset(wp, 0, sizeof(*wp));
 
 		wp->index = index;
diff --git a/src/script/squirrel_helper.hpp b/src/script/squirrel_helper.hpp
index 8d1ee29fc..c362601eb 100644
--- a/src/script/squirrel_helper.hpp
+++ b/src/script/squirrel_helper.hpp
@@ -117,7 +117,7 @@ namespace SQConvert {
 		sq_getstring(vm, -1, &tmp);
 		char *tmp_str = stredup(tmp);
 		sq_poptop(vm);
-		*ptr->Append() = (void *)tmp_str;
+		ptr->push_back((void *)tmp_str);
 		str_validate(tmp_str, tmp_str + strlen(tmp_str));
 		return tmp_str;
 	}
@@ -137,7 +137,7 @@ namespace SQConvert {
 		while (SQ_SUCCEEDED(sq_next(vm, -2))) {
 			SQInteger tmp;
 			if (SQ_SUCCEEDED(sq_getinteger(vm, -1, &tmp))) {
-				*data.Append() = (int32)tmp;
+				data.push_back((int32)tmp);
 			} else {
 				sq_pop(vm, 4);
 				throw sq_throwerror(vm, "a member of an array used as parameter to a function is not numeric");
@@ -151,7 +151,7 @@ namespace SQConvert {
 		arr->size = data.size();
 		memcpy(arr->array, data.Begin(), sizeof(int32) * data.size());
 
-		*ptr->Append() = arr;
+		ptr->push_back(arr);
 		return arr;
 	}
 
diff --git a/src/settings.cpp b/src/settings.cpp
index 8f57b6bda..2c9fc305e 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -727,7 +727,7 @@ static void IniLoadSettingList(IniFile *ini, const char *grpname, StringList *li
 	list->Clear();
 
 	for (const IniItem *item = group->item; item != NULL; item = item->next) {
-		if (item->name != NULL) *list->Append() = stredup(item->name);
+		if (item->name != NULL) list->push_back(stredup(item->name));
 	}
 }
 
@@ -1777,7 +1777,7 @@ void GetGRFPresetList(GRFPresetList *list)
 	IniGroup *group;
 	for (group = ini->group; group != NULL; group = group->next) {
 		if (strncmp(group->name, "preset-", 7) == 0) {
-			*list->Append() = stredup(group->name + 7);
+			list->push_back(stredup(group->name + 7));
 		}
 	}
 
diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
index 8b20bb9f2..da4989e85 100644
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -129,7 +129,7 @@ static DropDownList *BuildSetDropDownList(int *selected_index, bool allow_select
 
 	DropDownList *list = new DropDownList();
 	for (int i = 0; i < n; i++) {
-		*list->Append() = new DropDownListCharStringItem(T::GetSet(i)->name, i, !allow_selection && (*selected_index != i));
+		list->push_back(new DropDownListCharStringItem(T::GetSet(i)->name, i, !allow_selection && (*selected_index != i)));
 	}
 
 	return list;
@@ -213,13 +213,13 @@ struct GameOptionsWindow : Window {
 				/* Add non-custom currencies; sorted naturally */
 				for (uint i = 0; i < CURRENCY_END; items++, i++) {
 					if (i == CURRENCY_CUSTOM) continue;
-					*list->Append() = new DropDownListStringItem(*items, i, HasBit(disabled, i));
+					list->push_back(new DropDownListStringItem(*items, i, HasBit(disabled, i)));
 				}
 				QSortT(list->Begin(), list->size(), DropDownListStringItem::NatSortFunc);
 
 				/* Append custom currency at the end */
-				*list->Append() = new DropDownListItem(-1, false); // separator line
-				*list->Append() = new DropDownListStringItem(STR_GAME_OPTIONS_CURRENCY_CUSTOM, CURRENCY_CUSTOM, HasBit(disabled, CURRENCY_CUSTOM));
+				list->push_back(new DropDownListItem(-1, false)); // separator line
+				list->push_back(new DropDownListStringItem(STR_GAME_OPTIONS_CURRENCY_CUSTOM, CURRENCY_CUSTOM, HasBit(disabled, CURRENCY_CUSTOM)));
 				break;
 			}
 
@@ -237,7 +237,7 @@ struct GameOptionsWindow : Window {
 				}
 
 				for (uint i = 0; *items != INVALID_STRING_ID; items++, i++) {
-					*list->Append() = new DropDownListStringItem(*items, i, HasBit(disabled, i));
+					list->push_back(new DropDownListStringItem(*items, i, HasBit(disabled, i)));
 				}
 				break;
 			}
@@ -251,20 +251,20 @@ struct GameOptionsWindow : Window {
 				/* Add and sort newgrf townnames generators */
 				for (int i = 0; i < _nb_grf_names; i++) {
 					int result = _nb_orig_names + i;
-					*list->Append() = new DropDownListStringItem(_grf_names[i], result, enabled_item != result && enabled_item >= 0);
+					list->push_back(new DropDownListStringItem(_grf_names[i], result, enabled_item != result && enabled_item >= 0));
 				}
 				QSortT(list->Begin(), list->size(), DropDownListStringItem::NatSortFunc);
 
 				int newgrf_size = list->size();
 				/* Insert newgrf_names at the top of the list */
 				if (newgrf_size > 0) {
-					*list->Append() = new DropDownListItem(-1, false); // separator line
+					list->push_back(new DropDownListItem(-1, false)); // separator line
 					newgrf_size++;
 				}
 
 				/* Add and sort original townnames generators */
 				for (int i = 0; i < _nb_orig_names; i++) {
-					*list->Append() = new DropDownListStringItem(STR_GAME_OPTIONS_TOWN_NAME_ORIGINAL_ENGLISH + i, i, enabled_item != i && enabled_item >= 0);
+					list->push_back(new DropDownListStringItem(STR_GAME_OPTIONS_TOWN_NAME_ORIGINAL_ENGLISH + i, i, enabled_item != i && enabled_item >= 0));
 				}
 				QSortT(list->Begin() + newgrf_size, list->size() - newgrf_size, DropDownListStringItem::NatSortFunc);
 				break;
@@ -275,7 +275,7 @@ struct GameOptionsWindow : Window {
 				*selected_index = _settings_client.gui.autosave;
 				const StringID *items = _autosave_dropdown;
 				for (uint i = 0; *items != INVALID_STRING_ID; items++, i++) {
-					*list->Append() = new DropDownListStringItem(*items, i, false);
+					list->push_back(new DropDownListStringItem(*items, i, false));
 				}
 				break;
 			}
@@ -284,7 +284,7 @@ struct GameOptionsWindow : Window {
 				list = new DropDownList();
 				for (uint i = 0; i < _languages.size(); i++) {
 					if (&_languages[i] == _current_language) *selected_index = i;
-					*list->Append() = new DropDownListStringItem(SPECSTR_LANGUAGE_START + i, i, false);
+					list->push_back(new DropDownListStringItem(SPECSTR_LANGUAGE_START + i, i, false));
 				}
 				QSortT(list->Begin(), list->size(), DropDownListStringItem::NatSortFunc);
 				break;
@@ -296,7 +296,7 @@ struct GameOptionsWindow : Window {
 				list = new DropDownList();
 				*selected_index = GetCurRes();
 				for (int i = 0; i < _num_resolutions; i++) {
-					*list->Append() = new DropDownListStringItem(SPECSTR_RESOLUTION_START + i, i, false);
+					list->push_back(new DropDownListStringItem(SPECSTR_RESOLUTION_START + i, i, false));
 				}
 				break;
 
@@ -305,7 +305,7 @@ struct GameOptionsWindow : Window {
 				*selected_index = ZOOM_LVL_OUT_4X - _gui_zoom;
 				const StringID *items = _gui_zoom_dropdown;
 				for (int i = 0; *items != INVALID_STRING_ID; items++, i++) {
-					*list->Append() = new DropDownListStringItem(*items, i, _settings_client.gui.zoom_min > ZOOM_LVL_OUT_4X - i);
+					list->push_back(new DropDownListStringItem(*items, i, _settings_client.gui.zoom_min > ZOOM_LVL_OUT_4X - i));
 				}
 				break;
 			}
@@ -315,7 +315,7 @@ struct GameOptionsWindow : Window {
 				*selected_index = ZOOM_LVL_OUT_4X - _font_zoom;
 				const StringID *items = _font_zoom_dropdown;
 				for (int i = 0; *items != INVALID_STRING_ID; items++, i++) {
-					*list->Append() = new DropDownListStringItem(*items, i, false);
+					list->push_back(new DropDownListStringItem(*items, i, false));
 				}
 				break;
 			}
@@ -1964,16 +1964,16 @@ struct GameSettingsWindow : Window {
 					 * we don't want to allow comparing with new game's settings. */
 					bool disabled = mode == RM_CHANGED_AGAINST_NEW && settings_ptr == &_settings_newgame;
 
-					*list->Append() = new DropDownListStringItem(_game_settings_restrict_dropdown[mode], mode, disabled);
+					list->push_back(new DropDownListStringItem(_game_settings_restrict_dropdown[mode], mode, disabled));
 				}
 				break;
 
 			case WID_GS_TYPE_DROPDOWN:
 				list = new DropDownList();
-				*list->Append() = new DropDownListStringItem(STR_CONFIG_SETTING_TYPE_DROPDOWN_ALL, ST_ALL, false);
-				*list->Append() = new DropDownListStringItem(_game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_INGAME, ST_GAME, false);
-				*list->Append() = new DropDownListStringItem(_game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_INGAME, ST_COMPANY, false);
-				*list->Append() = new DropDownListStringItem(STR_CONFIG_SETTING_TYPE_DROPDOWN_CLIENT, ST_CLIENT, false);
+				list->push_back(new DropDownListStringItem(STR_CONFIG_SETTING_TYPE_DROPDOWN_ALL, ST_ALL, false));
+				list->push_back(new DropDownListStringItem(_game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_GAME_INGAME, ST_GAME, false));
+				list->push_back(new DropDownListStringItem(_game_mode == GM_MENU ? STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_MENU : STR_CONFIG_SETTING_TYPE_DROPDOWN_COMPANY_INGAME, ST_COMPANY, false));
+				list->push_back(new DropDownListStringItem(STR_CONFIG_SETTING_TYPE_DROPDOWN_CLIENT, ST_CLIENT, false));
 				break;
 		}
 		return list;
@@ -2130,7 +2130,7 @@ struct GameSettingsWindow : Window {
 
 					DropDownList *list = new DropDownList();
 					for (int i = sdb->min; i <= (int)sdb->max; i++) {
-						*list->Append() = new DropDownListStringItem(sdb->str_val + i - sdb->min, i, false);
+						list->push_back(new DropDownListStringItem(sdb->str_val + i - sdb->min, i, false));
 					}
 
 					ShowDropDownListAt(this, list, value, -1, wi_rect, COLOUR_ORANGE, true);
diff --git a/src/settingsgen/settingsgen.cpp b/src/settingsgen/settingsgen.cpp
index 64901a89f..1847bedff 100644
--- a/src/settingsgen/settingsgen.cpp
+++ b/src/settingsgen/settingsgen.cpp
@@ -121,9 +121,10 @@ public:
 			text += stored_size;
 		}
 		while (length > 0) {
-			OutputBuffer *block = this->output_buffer.Append();
-			block->Clear(); // Initialize the new block.
-			int stored_size = block->Add(text, length);
+			/*C++17: OutputBuffer &block =*/ this->output_buffer.emplace_back();
+			OutputBuffer &block = this->output_buffer.back();
+			block.Clear(); // Initialize the new block.
+			int stored_size = block.Add(text, length);
 			length -= stored_size;
 			text += stored_size;
 		}
diff --git a/src/signs_gui.cpp b/src/signs_gui.cpp
index 0a1f0dd5d..cab19c22f 100644
--- a/src/signs_gui.cpp
+++ b/src/signs_gui.cpp
@@ -63,7 +63,7 @@ struct SignList {
 		this->signs.clear();
 
 		const Sign *si;
-		FOR_ALL_SIGNS(si) *this->signs.Append() = si;
+		FOR_ALL_SIGNS(si) this->signs.push_back(si);
 
 		this->signs.SetFilterState(true);
 		this->FilterSignList();
diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index 2dee09fe8..fcbf514bc 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -942,7 +942,7 @@ static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag fl
 					if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
 						Train *v = GetTrainForReservation(tile_cur, track);
 						if (v != NULL) {
-							*affected_vehicles.Append() = v;
+							affected_vehicles.push_back(v);
 						}
 					}
 					CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
@@ -1386,7 +1386,7 @@ CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32
 					/* Check for trains having a reservation for this tile. */
 					Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
 					if (v != NULL) {
-						*affected_vehicles.Append() = v;
+						affected_vehicles.push_back(v);
 						FreeTrainReservation(v);
 					}
 				}
@@ -3538,7 +3538,7 @@ void DeleteStaleLinks(Station *from)
 							}
 						}
 						if (!found_to || !found_from) continue;
-						*(vehicles.Append()) = l->GetFirstSharedVehicle();
+						vehicles.push_back(l->GetFirstSharedVehicle());
 					}
 
 					auto iter = vehicles.begin();
diff --git a/src/station_gui.cpp b/src/station_gui.cpp
index e1f5daa69..98ac80df4 100644
--- a/src/station_gui.cpp
+++ b/src/station_gui.cpp
@@ -189,14 +189,14 @@ protected:
 						if (st->goods[j].HasRating()) {
 							num_waiting_cargo++; // count number of waiting cargo
 							if (HasBit(this->cargo_filter, j)) {
-								*this->stations.Append() = st;
+								this->stations.push_back(st);
 								break;
 							}
 						}
 					}
 					/* stations without waiting cargo */
 					if (num_waiting_cargo == 0 && this->include_empty) {
-						*this->stations.Append() = st;
+						this->stations.push_back(st);
 					}
 				}
 			}
@@ -2135,7 +2135,7 @@ static bool AddNearbyStation(TileIndex tile, void *user_data)
 	for (uint i = 0; i < _deleted_stations_nearby.size(); i++) {
 		auto ts = _deleted_stations_nearby.begin() + i;
 		if (ts->tile == tile) {
-			*_stations_nearby_list.Append() = _deleted_stations_nearby[i].station;
+			_stations_nearby_list.push_back(_deleted_stations_nearby[i].station);
 			_deleted_stations_nearby.erase(ts);
 			i--;
 		}
@@ -2153,7 +2153,7 @@ static bool AddNearbyStation(TileIndex tile, void *user_data)
 	if (st->owner != _local_company || std::find(_stations_nearby_list.begin(), _stations_nearby_list.end(), sid) != _stations_nearby_list.end()) return false;
 
 	if (st->rect.BeforeAddRect(ctx->tile, ctx->w, ctx->h, StationRect::ADD_TEST).Succeeded()) {
-		*_stations_nearby_list.Append() = sid;
+		_stations_nearby_list.push_back(sid);
 	}
 
 	return false; // We want to include *all* nearby stations
@@ -2187,9 +2187,7 @@ static const T *FindStationsNearby(TileArea ta, bool distant_join)
 		if (T::IsExpected(st) && !st->IsInUse() && st->owner == _local_company) {
 			/* Include only within station spread (yes, it is strictly less than) */
 			if (max(DistanceMax(ta.tile, st->xy), DistanceMax(TILE_ADDXY(ta.tile, ta.w - 1, ta.h - 1), st->xy)) < _settings_game.station.station_spread) {
-				TileAndStation *ts = _deleted_stations_nearby.Append();
-				ts->tile = st->xy;
-				ts->station = st->index;
+				_deleted_stations_nearby.push_back({st->xy, st->index});
 
 				/* Add the station when it's within where we're going to build */
 				if (IsInsideBS(TileX(st->xy), TileX(ctx.tile), ctx.w) &&
diff --git a/src/story_gui.cpp b/src/story_gui.cpp
index 78c8b9793..aed00358d 100644
--- a/src/story_gui.cpp
+++ b/src/story_gui.cpp
@@ -57,7 +57,7 @@ protected:
 			const StoryPage *p;
 			FOR_ALL_STORY_PAGES(p) {
 				if (this->IsPageAvailable(p)) {
-					*this->story_pages.Append() = p;
+					this->story_pages.push_back(p);
 				}
 			}
 
@@ -85,7 +85,7 @@ protected:
 				const StoryPageElement *pe;
 				FOR_ALL_STORY_PAGE_ELEMENTS(pe) {
 					if (pe->page == p->index) {
-						*this->story_page_elements.Append() = pe;
+						this->story_page_elements.push_back(pe);
 					}
 				}
 			}
@@ -248,7 +248,7 @@ protected:
 				item = str_item;
 			}
 
-			*list->Append() = item;
+			list->push_back(item);
 			page_num++;
 		}
 
diff --git a/src/strgen/strgen_base.cpp b/src/strgen/strgen_base.cpp
index 0e75537fb..12d993844 100644
--- a/src/strgen/strgen_base.cpp
+++ b/src/strgen/strgen_base.cpp
@@ -242,7 +242,7 @@ struct Buffer : SmallVector<byte, 256> {
 	 */
 	void AppendByte(byte value)
 	{
-		*this->Append() = value;
+		this->push_back(value);
 	}
 
 	/**
@@ -252,19 +252,19 @@ struct Buffer : SmallVector<byte, 256> {
 	void AppendUtf8(uint32 value)
 	{
 		if (value < 0x80) {
-			*this->Append() = value;
+			this->push_back(value);
 		} else if (value < 0x800) {
-			*this->Append() = 0xC0 + GB(value,  6, 5);
-			*this->Append() = 0x80 + GB(value,  0, 6);
+			this->push_back(0xC0 + GB(value,  6, 5));
+			this->push_back(0x80 + GB(value,  0, 6));
 		} else if (value < 0x10000) {
-			*this->Append() = 0xE0 + GB(value, 12, 4);
-			*this->Append() = 0x80 + GB(value,  6, 6);
-			*this->Append() = 0x80 + GB(value,  0, 6);
+			this->push_back(0xE0 + GB(value, 12, 4));
+			this->push_back(0x80 + GB(value,  6, 6));
+			this->push_back(0x80 + GB(value,  0, 6));
 		} else if (value < 0x110000) {
-			*this->Append() = 0xF0 + GB(value, 18, 3);
-			*this->Append() = 0x80 + GB(value, 12, 6);
-			*this->Append() = 0x80 + GB(value,  6, 6);
-			*this->Append() = 0x80 + GB(value,  0, 6);
+			this->push_back(0xF0 + GB(value, 18, 3));
+			this->push_back(0x80 + GB(value, 12, 6));
+			this->push_back(0x80 + GB(value,  6, 6));
+			this->push_back(0x80 + GB(value,  0, 6));
 		} else {
 			strgen_warning("Invalid unicode value U+0x%X", value);
 		}
diff --git a/src/string.cpp b/src/string.cpp
index 5246f7827..c23202acb 100644
--- a/src/string.cpp
+++ b/src/string.cpp
@@ -634,8 +634,8 @@ public:
 		this->char_itr = icu::BreakIterator::createCharacterInstance(icu::Locale(_current_language != NULL ? _current_language->isocode : "en"), status);
 		this->word_itr = icu::BreakIterator::createWordInstance(icu::Locale(_current_language != NULL ? _current_language->isocode : "en"), status);
 
-		*this->utf16_str.Append() = '\0';
-		*this->utf16_to_utf8.Append() = 0;
+		this->utf16_str.push_back('\0');
+		this->utf16_to_utf8.push_back(0);
 	}
 
 	virtual ~IcuStringIterator()
@@ -660,17 +660,17 @@ public:
 
 			WChar c = Utf8Consume(&s);
 			if (c < 0x10000) {
-				*this->utf16_str.Append() = (UChar)c;
+				this->utf16_str.push_back((UChar)c);
 			} else {
 				/* Make a surrogate pair. */
-				*this->utf16_str.Append() = (UChar)(0xD800 + ((c - 0x10000) >> 10));
-				*this->utf16_str.Append() = (UChar)(0xDC00 + ((c - 0x10000) & 0x3FF));
-				*this->utf16_to_utf8.Append() = idx;
+				this->utf16_str.push_back((UChar)(0xD800 + ((c - 0x10000) >> 10)));
+				this->utf16_str.push_back((UChar)(0xDC00 + ((c - 0x10000) & 0x3FF)));
+				this->utf16_to_utf8.push_back(idx);
 			}
-			*this->utf16_to_utf8.Append() = idx;
+			this->utf16_to_utf8.push_back(idx);
 		}
-		*this->utf16_str.Append() = '\0';
-		*this->utf16_to_utf8.Append() = s - string_base;
+		this->utf16_str.push_back('\0');
+		this->utf16_to_utf8.push_back(s - string_base);
 
 		UText text = UTEXT_INITIALIZER;
 		UErrorCode status = U_ZERO_ERROR;
diff --git a/src/stringfilter.cpp b/src/stringfilter.cpp
index b12abff7f..e546a4186 100644
--- a/src/stringfilter.cpp
+++ b/src/stringfilter.cpp
@@ -76,9 +76,8 @@ void StringFilter::SetFilterTerm(const char *str)
 
 		/* Add to word */
 		if (word == NULL) {
-			word = this->word_index.Append();
-			word->start = dest;
-			word->match = false;
+			/*C++17: word = &*/ this->word_index.push_back({dest, false});
+			word = &this->word_index.back();
 		}
 
 		memcpy(dest, pos, len);
diff --git a/src/strings.cpp b/src/strings.cpp
index 61a5098ab..c3f306183 100644
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -1932,7 +1932,7 @@ static void GetLanguageList(const char *path)
 			} else if (GetLanguage(lmd.newgrflangid) != NULL) {
 				DEBUG(misc, 3, "%s's language ID is already known", lmd.file);
 			} else {
-				*_languages.Append() = lmd;
+				_languages.push_back(lmd);
 			}
 		}
 		closedir(dir);
diff --git a/src/texteff.cpp b/src/texteff.cpp
index 92c201704..c81d9a95d 100644
--- a/src/texteff.cpp
+++ b/src/texteff.cpp
@@ -48,20 +48,20 @@ TextEffectID AddTextEffect(StringID msg, int center, int y, uint8 duration, Text
 	for (i = 0; i < _text_effects.size(); i++) {
 		if (_text_effects[i].string_id == INVALID_STRING_ID) break;
 	}
-	if (i == _text_effects.size()) _text_effects.Append();
+	if (i == _text_effects.size()) _text_effects.emplace_back();
 
-	TextEffect *te = _text_effects.data() + i;
+	TextEffect &te = _text_effects[i];
 
 	/* Start defining this object */
-	te->string_id = msg;
-	te->duration = duration;
-	te->params_1 = GetDParam(0);
-	te->params_2 = GetDParam(1);
-	te->mode = mode;
+	te.string_id = msg;
+	te.duration = duration;
+	te.params_1 = GetDParam(0);
+	te.params_2 = GetDParam(1);
+	te.mode = mode;
 
 	/* Make sure we only dirty the new area */
-	te->width_normal = 0;
-	te->UpdatePosition(center, y, msg);
+	te.width_normal = 0;
+	te.UpdatePosition(center, y, msg);
 
 	return i;
 }
diff --git a/src/textfile_gui.cpp b/src/textfile_gui.cpp
index e9706c752..b4911a968 100644
--- a/src/textfile_gui.cpp
+++ b/src/textfile_gui.cpp
@@ -365,11 +365,11 @@ static void Xunzip(byte **bufp, size_t *sizep)
 	str_validate(p, this->text + filesize, SVS_REPLACE_WITH_QUESTION_MARK | SVS_ALLOW_NEWLINE);
 
 	/* Split the string on newlines. */
-	*this->lines.Append() = p;
+	this->lines.push_back(p);
 	for (; *p != '\0'; p++) {
 		if (*p == '\n') {
 			*p = '\0';
-			*this->lines.Append() = p + 1;
+			this->lines.push_back(p + 1);
 		}
 	}
 
diff --git a/src/timetable_cmd.cpp b/src/timetable_cmd.cpp
index dec4f7d44..8107fc3d2 100644
--- a/src/timetable_cmd.cpp
+++ b/src/timetable_cmd.cpp
@@ -285,10 +285,10 @@ CommandCost CmdSetTimetableStart(TileIndex tile, DoCommandFlag flags, uint32 p1,
 
 		if (timetable_all) {
 			for (Vehicle *w = v->orders.list->GetFirstSharedVehicle(); w != NULL; w = w->NextShared()) {
-				*vehs.Append() = w;
+				vehs.push_back(w);
 			}
 		} else {
-			*vehs.Append() = v;
+			vehs.push_back(v);
 		}
 
 		int total_duration = v->orders.list->GetTimetableTotalDuration();
diff --git a/src/toolbar_gui.cpp b/src/toolbar_gui.cpp
index 7052dc4e2..eac99f249 100644
--- a/src/toolbar_gui.cpp
+++ b/src/toolbar_gui.cpp
@@ -198,7 +198,7 @@ static void PopupMainToolbMenu(Window *w, int widget, StringID string, int count
 {
 	DropDownList *list = new DropDownList();
 	for (int i = 0; i < count; i++) {
-		*list->Append() = new DropDownListStringItem(string + i, i, false);
+		list->push_back(new DropDownListStringItem(string + i, i, false));
 	}
 	PopupMainToolbMenu(w, widget, list, 0);
 }
@@ -224,27 +224,27 @@ static void PopupMainCompanyToolbMenu(Window *w, int widget, int grey = 0)
 			if (!_networking) break;
 
 			/* Add the client list button for the companies menu */
-			*list->Append() = new DropDownListStringItem(STR_NETWORK_COMPANY_LIST_CLIENT_LIST, CTMN_CLIENT_LIST, false);
+			list->push_back(new DropDownListStringItem(STR_NETWORK_COMPANY_LIST_CLIENT_LIST, CTMN_CLIENT_LIST, false));
 
 			if (_local_company == COMPANY_SPECTATOR) {
-				*list->Append() = new DropDownListStringItem(STR_NETWORK_COMPANY_LIST_NEW_COMPANY, CTMN_NEW_COMPANY, NetworkMaxCompaniesReached());
+				list->push_back(new DropDownListStringItem(STR_NETWORK_COMPANY_LIST_NEW_COMPANY, CTMN_NEW_COMPANY, NetworkMaxCompaniesReached()));
 			} else {
-				*list->Append() = new DropDownListStringItem(STR_NETWORK_COMPANY_LIST_SPECTATE, CTMN_SPECTATE, NetworkMaxSpectatorsReached());
+				list->push_back(new DropDownListStringItem(STR_NETWORK_COMPANY_LIST_SPECTATE, CTMN_SPECTATE, NetworkMaxSpectatorsReached()));
 			}
 			break;
 
 		case WID_TN_STORY:
-			*list->Append() = new DropDownListStringItem(STR_STORY_BOOK_SPECTATOR, CTMN_SPECTATOR, false);
+			list->push_back(new DropDownListStringItem(STR_STORY_BOOK_SPECTATOR, CTMN_SPECTATOR, false));
 			break;
 
 		case WID_TN_GOAL:
-			*list->Append() = new DropDownListStringItem(STR_GOALS_SPECTATOR, CTMN_SPECTATOR, false);
+			list->push_back(new DropDownListStringItem(STR_GOALS_SPECTATOR, CTMN_SPECTATOR, false));
 			break;
 	}
 
 	for (CompanyID c = COMPANY_FIRST; c < MAX_COMPANIES; c++) {
 		if (!Company::IsValidID(c)) continue;
-		*list->Append() = new DropDownListCompanyItem(c, false, HasBit(grey, c));
+		list->push_back(new DropDownListCompanyItem(c, false, HasBit(grey, c)));
 	}
 
 	PopupMainToolbMenu(w, widget, list, _local_company == COMPANY_SPECTATOR ? (widget == WID_TN_COMPANIES ? CTMN_CLIENT_LIST : CTMN_SPECTATOR) : (int)_local_company);
@@ -318,24 +318,24 @@ enum OptionMenuEntries {
 static CallBackFunction ToolbarOptionsClick(Window *w)
 {
 	DropDownList *list = new DropDownList();
-	*list->Append() = new DropDownListStringItem(STR_SETTINGS_MENU_GAME_OPTIONS,             OME_GAMEOPTIONS, false);
-	*list->Append() = new DropDownListStringItem(STR_SETTINGS_MENU_CONFIG_SETTINGS_TREE,     OME_SETTINGS, false);
+	list->push_back(new DropDownListStringItem(STR_SETTINGS_MENU_GAME_OPTIONS,             OME_GAMEOPTIONS, false));
+	list->push_back(new DropDownListStringItem(STR_SETTINGS_MENU_CONFIG_SETTINGS_TREE,     OME_SETTINGS, false));
 	/* Changes to the per-AI settings don't get send from the server to the clients. Clients get
 	 * the settings once they join but never update it. As such don't show the window at all
 	 * to network clients. */
-	if (!_networking || _network_server) *list->Append() = new DropDownListStringItem(STR_SETTINGS_MENU_SCRIPT_SETTINGS, OME_SCRIPT_SETTINGS, false);
-	*list->Append() = new DropDownListStringItem(STR_SETTINGS_MENU_NEWGRF_SETTINGS,          OME_NEWGRFSETTINGS, false);
-	*list->Append() = new DropDownListStringItem(STR_SETTINGS_MENU_TRANSPARENCY_OPTIONS,     OME_TRANSPARENCIES, false);
-	*list->Append() = new DropDownListItem(-1, false);
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_TOWN_NAMES_DISPLAYED,    OME_SHOW_TOWNNAMES, false, HasBit(_display_opt, DO_SHOW_TOWN_NAMES));
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_STATION_NAMES_DISPLAYED, OME_SHOW_STATIONNAMES, false, HasBit(_display_opt, DO_SHOW_STATION_NAMES));
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_WAYPOINTS_DISPLAYED,     OME_SHOW_WAYPOINTNAMES, false, HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES));
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_SIGNS_DISPLAYED,         OME_SHOW_SIGNS, false, HasBit(_display_opt, DO_SHOW_SIGNS));
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_SHOW_COMPETITOR_SIGNS,   OME_SHOW_COMPETITOR_SIGNS, false, HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS));
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_FULL_ANIMATION,          OME_FULL_ANIMATION, false, HasBit(_display_opt, DO_FULL_ANIMATION));
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_FULL_DETAIL,             OME_FULL_DETAILS, false, HasBit(_display_opt, DO_FULL_DETAIL));
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_TRANSPARENT_BUILDINGS,   OME_TRANSPARENTBUILDINGS, false, IsTransparencySet(TO_HOUSES));
-	*list->Append() = new DropDownListCheckedItem(STR_SETTINGS_MENU_TRANSPARENT_SIGNS,       OME_SHOW_STATIONSIGNS, false, IsTransparencySet(TO_SIGNS));
+	if (!_networking || _network_server) list->push_back(new DropDownListStringItem(STR_SETTINGS_MENU_SCRIPT_SETTINGS, OME_SCRIPT_SETTINGS, false));
+	list->push_back(new DropDownListStringItem(STR_SETTINGS_MENU_NEWGRF_SETTINGS,          OME_NEWGRFSETTINGS, false));
+	list->push_back(new DropDownListStringItem(STR_SETTINGS_MENU_TRANSPARENCY_OPTIONS,     OME_TRANSPARENCIES, false));
+	list->push_back(new DropDownListItem(-1, false));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_TOWN_NAMES_DISPLAYED,    OME_SHOW_TOWNNAMES, false, HasBit(_display_opt, DO_SHOW_TOWN_NAMES)));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_STATION_NAMES_DISPLAYED, OME_SHOW_STATIONNAMES, false, HasBit(_display_opt, DO_SHOW_STATION_NAMES)));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_WAYPOINTS_DISPLAYED,     OME_SHOW_WAYPOINTNAMES, false, HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_SIGNS_DISPLAYED,         OME_SHOW_SIGNS, false, HasBit(_display_opt, DO_SHOW_SIGNS)));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_SHOW_COMPETITOR_SIGNS,   OME_SHOW_COMPETITOR_SIGNS, false, HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS)));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_FULL_ANIMATION,          OME_FULL_ANIMATION, false, HasBit(_display_opt, DO_FULL_ANIMATION)));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_FULL_DETAIL,             OME_FULL_DETAILS, false, HasBit(_display_opt, DO_FULL_DETAIL)));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_TRANSPARENT_BUILDINGS,   OME_TRANSPARENTBUILDINGS, false, IsTransparencySet(TO_HOUSES)));
+	list->push_back(new DropDownListCheckedItem(STR_SETTINGS_MENU_TRANSPARENT_SIGNS,       OME_SHOW_STATIONSIGNS, false, IsTransparencySet(TO_SIGNS)));
 
 	ShowDropDownList(w, list, 0, WID_TN_SETTINGS, 140, true, true);
 	if (_settings_client.sound.click_beep) SndPlayFx(SND_15_BEEP);
@@ -464,10 +464,10 @@ enum MapMenuEntries {
 static CallBackFunction ToolbarMapClick(Window *w)
 {
 	DropDownList *list = new DropDownList();
-	*list->Append() = new DropDownListStringItem(STR_MAP_MENU_MAP_OF_WORLD,            MME_SHOW_SMALLMAP,          false);
-	*list->Append() = new DropDownListStringItem(STR_MAP_MENU_EXTRA_VIEW_PORT,         MME_SHOW_EXTRAVIEWPORTS,    false);
-	*list->Append() = new DropDownListStringItem(STR_MAP_MENU_LINGRAPH_LEGEND,         MME_SHOW_LINKGRAPH,         false);
-	*list->Append() = new DropDownListStringItem(STR_MAP_MENU_SIGN_LIST,               MME_SHOW_SIGNLISTS,         false);
+	list->push_back(new DropDownListStringItem(STR_MAP_MENU_MAP_OF_WORLD,            MME_SHOW_SMALLMAP,          false));
+	list->push_back(new DropDownListStringItem(STR_MAP_MENU_EXTRA_VIEW_PORT,         MME_SHOW_EXTRAVIEWPORTS,    false));
+	list->push_back(new DropDownListStringItem(STR_MAP_MENU_LINGRAPH_LEGEND,         MME_SHOW_LINKGRAPH,         false));
+	list->push_back(new DropDownListStringItem(STR_MAP_MENU_SIGN_LIST,               MME_SHOW_SIGNLISTS,         false));
 	PopupMainToolbMenu(w, WID_TN_SMALL_MAP, list, 0);
 	return CBF_NONE;
 }
@@ -475,11 +475,11 @@ static CallBackFunction ToolbarMapClick(Window *w)
 static CallBackFunction ToolbarScenMapTownDir(Window *w)
 {
 	DropDownList *list = new DropDownList();
-	*list->Append() = new DropDownListStringItem(STR_MAP_MENU_MAP_OF_WORLD,            MME_SHOW_SMALLMAP,          false);
-	*list->Append() = new DropDownListStringItem(STR_MAP_MENU_EXTRA_VIEW_PORT,         MME_SHOW_EXTRAVIEWPORTS,    false);
-	*list->Append() = new DropDownListStringItem(STR_MAP_MENU_SIGN_LIST,               MME_SHOW_SIGNLISTS,         false);
-	*list->Append() = new DropDownListStringItem(STR_TOWN_MENU_TOWN_DIRECTORY,         MME_SHOW_TOWNDIRECTORY,     false);
-	*list->Append() = new DropDownListStringItem(STR_INDUSTRY_MENU_INDUSTRY_DIRECTORY, MME_SHOW_INDUSTRYDIRECTORY, false);
+	list->push_back(new DropDownListStringItem(STR_MAP_MENU_MAP_OF_WORLD,            MME_SHOW_SMALLMAP,          false));
+	list->push_back(new DropDownListStringItem(STR_MAP_MENU_EXTRA_VIEW_PORT,         MME_SHOW_EXTRAVIEWPORTS,    false));
+	list->push_back(new DropDownListStringItem(STR_MAP_MENU_SIGN_LIST,               MME_SHOW_SIGNLISTS,         false));
+	list->push_back(new DropDownListStringItem(STR_TOWN_MENU_TOWN_DIRECTORY,         MME_SHOW_TOWNDIRECTORY,     false));
+	list->push_back(new DropDownListStringItem(STR_INDUSTRY_MENU_INDUSTRY_DIRECTORY, MME_SHOW_INDUSTRYDIRECTORY, false));
 	PopupMainToolbMenu(w, WID_TE_SMALL_MAP, list, 0);
 	return CBF_NONE;
 }
@@ -897,7 +897,7 @@ static CallBackFunction ToolbarBuildRoadClick(Window *w)
 	DropDownList *list = new DropDownList();
 
 	/* Road is always visible and available. */
-	*list->Append() = new DropDownListIconItem(SPR_IMG_ROAD_X_DIR, PAL_NONE, STR_ROAD_MENU_ROAD_CONSTRUCTION, ROADTYPE_ROAD, false);
+	list->push_back(new DropDownListIconItem(SPR_IMG_ROAD_X_DIR, PAL_NONE, STR_ROAD_MENU_ROAD_CONSTRUCTION, ROADTYPE_ROAD, false));
 
 	/* Tram is only visible when there will be a tram, and available when that has been introduced. */
 	Engine *e;
@@ -905,7 +905,7 @@ static CallBackFunction ToolbarBuildRoadClick(Window *w)
 		if (!HasBit(e->info.climates, _settings_game.game_creation.landscape)) continue;
 		if (!HasBit(e->info.misc_flags, EF_ROAD_TRAM)) continue;
 
-		*list->Append() = new DropDownListIconItem(SPR_IMG_TRAMWAY_X_DIR, PAL_NONE, STR_ROAD_MENU_TRAM_CONSTRUCTION, ROADTYPE_TRAM, !HasBit(c->avail_roadtypes, ROADTYPE_TRAM));
+		list->push_back(new DropDownListIconItem(SPR_IMG_TRAMWAY_X_DIR, PAL_NONE, STR_ROAD_MENU_TRAM_CONSTRUCTION, ROADTYPE_TRAM, !HasBit(c->avail_roadtypes, ROADTYPE_TRAM)));
 		break;
 	}
 	ShowDropDownList(w, list, _last_built_roadtype, WID_TN_ROADS, 140, true, true);
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
index bf8fb4b87..55f65e320 100644
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -654,7 +654,7 @@ private:
 
 			const Town *t;
 			FOR_ALL_TOWNS(t) {
-				*this->towns.Append() = t;
+				this->towns.push_back(t);
 			}
 
 			this->towns.shrink_to_fit();
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index db3773f96..0d4df42f4 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -823,7 +823,7 @@ typedef SmallVector<Train *, 16> TrainList;
  */
 static void MakeTrainBackup(TrainList &list, Train *t)
 {
-	for (; t != NULL; t = t->Next()) *list.Append() = t;
+	for (; t != NULL; t = t->Next()) list.push_back(t);
 }
 
 /**
diff --git a/src/train_gui.cpp b/src/train_gui.cpp
index eab6a33e3..3036096c8 100644
--- a/src/train_gui.cpp
+++ b/src/train_gui.cpp
@@ -280,7 +280,8 @@ static void GetCargoSummaryOfArticulatedVehicle(const Train *v, CargoSummary *su
 
 		CargoSummaryItem *item = &*std::find(summary->begin(), summary->end(), new_item);
 		if (item == summary->End()) {
-			item = summary->Append();
+			/*C++17: item = &*/ summary->emplace_back();
+			item = &summary->back();
 			item->cargo = new_item.cargo;
 			item->subtype = new_item.subtype;
 			item->capacity = 0;
diff --git a/src/tunnelbridge_cmd.cpp b/src/tunnelbridge_cmd.cpp
index 06dc24e84..764551d81 100644
--- a/src/tunnelbridge_cmd.cpp
+++ b/src/tunnelbridge_cmd.cpp
@@ -681,9 +681,8 @@ CommandCost CmdBuildTunnel(TileIndex start_tile, DoCommandFlag flags, uint32 p1,
 		 * Do this for all tiles (like trees), not only objects. */
 		ClearedObjectArea *coa = FindClearedObject(end_tile);
 		if (coa == NULL) {
-			coa = _cleared_object_areas.Append();
-			coa->first_tile = end_tile;
-			coa->area = TileArea(end_tile, 1, 1);
+			/*C++17: coa = &*/ _cleared_object_areas.push_back({end_tile, TileArea(end_tile, 1, 1)});
+			coa = &_cleared_object_areas.back();
 		}
 
 		/* Hide the tile from the terraforming command */
diff --git a/src/vehicle.cpp b/src/vehicle.cpp
index 0e05d68f2..f1b727971 100644
--- a/src/vehicle.cpp
+++ b/src/vehicle.cpp
@@ -2283,9 +2283,7 @@ void Vehicle::GetConsistFreeCapacities(SmallMap<CargoID, uint> &capacities) cons
 		if (v->cargo_cap == 0) continue;
 		SmallPair<CargoID, uint> *pair = capacities.Find(v->cargo_type);
 		if (pair == capacities.End()) {
-			pair = capacities.Append();
-			pair->first = v->cargo_type;
-			pair->second = v->cargo_cap - v->cargo.StoredCount();
+			capacities.push_back({v->cargo_type, v->cargo_cap - v->cargo.StoredCount()});
 		} else {
 			pair->second += v->cargo_cap - v->cargo.StoredCount();
 		}
diff --git a/src/vehicle_cmd.cpp b/src/vehicle_cmd.cpp
index 636aadb49..8e578cd68 100644
--- a/src/vehicle_cmd.cpp
+++ b/src/vehicle_cmd.cpp
@@ -417,11 +417,7 @@ static CommandCost RefitVehicle(Vehicle *v, bool only_this, uint8 num_vehicles,
 		 *  - We have to call the refit cost callback with the pre-refit configuration of the chain because we want refit and
 		 *    autorefit to behave the same, and we need its result for auto_refit_allowed.
 		 */
-		RefitResult *result = refit_result.Append();
-		result->v = v;
-		result->capacity = amount;
-		result->mail_capacity = mail_capacity;
-		result->subtype = actual_subtype;
+		refit_result.push_back({v, amount, mail_capacity, actual_subtype});
 	}
 
 	if (flags & DC_EXEC) {
diff --git a/src/vehicle_gui.cpp b/src/vehicle_gui.cpp
index 4a42d746d..9fcebd4e6 100644
--- a/src/vehicle_gui.cpp
+++ b/src/vehicle_gui.cpp
@@ -168,13 +168,13 @@ DropDownList *BaseVehicleListWindow::BuildActionDropdownList(bool show_autorepla
 {
 	DropDownList *list = new DropDownList();
 
-	if (show_autoreplace) *list->Append() = new DropDownListStringItem(STR_VEHICLE_LIST_REPLACE_VEHICLES, ADI_REPLACE, false);
-	*list->Append() = new DropDownListStringItem(STR_VEHICLE_LIST_SEND_FOR_SERVICING, ADI_SERVICE, false);
-	*list->Append() = new DropDownListStringItem(this->vehicle_depot_name[this->vli.vtype], ADI_DEPOT, false);
+	if (show_autoreplace) list->push_back(new DropDownListStringItem(STR_VEHICLE_LIST_REPLACE_VEHICLES, ADI_REPLACE, false));
+	list->push_back(new DropDownListStringItem(STR_VEHICLE_LIST_SEND_FOR_SERVICING, ADI_SERVICE, false));
+	list->push_back(new DropDownListStringItem(this->vehicle_depot_name[this->vli.vtype], ADI_DEPOT, false));
 
 	if (show_group) {
-		*list->Append() = new DropDownListStringItem(STR_GROUP_ADD_SHARED_VEHICLE, ADI_ADD_SHARED, false);
-		*list->Append() = new DropDownListStringItem(STR_GROUP_REMOVE_ALL_VEHICLES, ADI_REMOVE_ALL, false);
+		list->push_back(new DropDownListStringItem(STR_GROUP_ADD_SHARED_VEHICLE, ADI_ADD_SHARED, false));
+		list->push_back(new DropDownListStringItem(STR_GROUP_REMOVE_ALL_VEHICLES, ADI_REMOVE_ALL, false));
 	}
 
 	return list;
@@ -438,10 +438,7 @@ struct RefitWindow : public Window {
 				bool first_vehicle = this->list[current_index].size() == 0;
 				if (first_vehicle) {
 					/* Keeping the current subtype is always an option. It also serves as the option in case of no subtypes */
-					RefitOption *option = this->list[current_index].Append();
-					option->cargo   = cid;
-					option->subtype = 0xFF;
-					option->string  = STR_EMPTY;
+					this->list[current_index].push_back({cid, 0xFF, STR_EMPTY});
 				}
 
 				/* Check the vehicle's callback mask for cargo suffixes.
diff --git a/src/vehiclelist.cpp b/src/vehiclelist.cpp
index 39ec90e8b..c98797573 100644
--- a/src/vehiclelist.cpp
+++ b/src/vehiclelist.cpp
@@ -85,7 +85,7 @@ void BuildDepotVehicleList(VehicleType type, TileIndex tile, VehicleList *engine
 				if (t->IsArticulatedPart() || t->IsRearDualheaded()) continue;
 				if (t->track != TRACK_BIT_DEPOT) continue;
 				if (wagons != NULL && t->First()->IsFreeWagon()) {
-					if (individual_wagons || t->IsFreeWagon()) *wagons->Append() = t;
+					if (individual_wagons || t->IsFreeWagon()) wagons->push_back(t);
 					continue;
 				}
 				break;
@@ -98,7 +98,7 @@ void BuildDepotVehicleList(VehicleType type, TileIndex tile, VehicleList *engine
 
 		if (!v->IsPrimaryVehicle()) continue;
 
-		*engines->Append() = v;
+		engines->push_back(v);
 	}
 
 	/* Ensure the lists are not wasting too much space. If the lists are fresh
@@ -128,7 +128,7 @@ bool GenerateVehicleSortList(VehicleList *list, const VehicleListIdentifier &vli
 					FOR_VEHICLE_ORDERS(v, order) {
 						if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT) || order->IsType(OT_IMPLICIT))
 								&& order->GetDestination() == vli.index) {
-							*list->Append() = v;
+							list->push_back(v);
 							break;
 						}
 					}
@@ -142,7 +142,7 @@ bool GenerateVehicleSortList(VehicleList *list, const VehicleListIdentifier &vli
 			if (v == NULL || v->type != vli.vtype || !v->IsPrimaryVehicle()) return false;
 
 			for (; v != NULL; v = v->NextShared()) {
-				*list->Append() = v;
+				list->push_back(v);
 			}
 			break;
 
@@ -151,7 +151,7 @@ bool GenerateVehicleSortList(VehicleList *list, const VehicleListIdentifier &vli
 				FOR_ALL_VEHICLES(v) {
 					if (v->type == vli.vtype && v->IsPrimaryVehicle() &&
 							v->owner == vli.company && GroupIsInGroup(v->group_id, vli.index)) {
-						*list->Append() = v;
+						list->push_back(v);
 					}
 				}
 				break;
@@ -161,7 +161,7 @@ bool GenerateVehicleSortList(VehicleList *list, const VehicleListIdentifier &vli
 		case VL_STANDARD:
 			FOR_ALL_VEHICLES(v) {
 				if (v->type == vli.vtype && v->owner == vli.company && v->IsPrimaryVehicle()) {
-					*list->Append() = v;
+					list->push_back(v);
 				}
 			}
 			break;
@@ -173,7 +173,7 @@ bool GenerateVehicleSortList(VehicleList *list, const VehicleListIdentifier &vli
 
 					FOR_VEHICLE_ORDERS(v, order) {
 						if (order->IsType(OT_GOTO_DEPOT) && !(order->GetDepotActionType() & ODATFB_NEAREST_DEPOT) && order->GetDestination() == vli.index) {
-							*list->Append() = v;
+							list->push_back(v);
 							break;
 						}
 					}
diff --git a/src/viewport.cpp b/src/viewport.cpp
index 5d6f58268..929616ba5 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -499,13 +499,14 @@ static void AddTileSpriteToDraw(SpriteID image, PaletteID pal, int32 x, int32 y,
 {
 	assert((image & SPRITE_MASK) < MAX_SPRITES);
 
-	TileSpriteToDraw *ts = _vd.tile_sprites_to_draw.Append();
-	ts->image = image;
-	ts->pal = pal;
-	ts->sub = sub;
+	/*C++17: TileSpriteToDraw &ts = */ _vd.tile_sprites_to_draw.emplace_back();
+	TileSpriteToDraw &ts = _vd.tile_sprites_to_draw.back();
+	ts.image = image;
+	ts.pal = pal;
+	ts.sub = sub;
 	Point pt = RemapCoords(x, y, z);
-	ts->x = pt.x + extra_offs_x;
-	ts->y = pt.y + extra_offs_y;
+	ts.x = pt.x + extra_offs_x;
+	ts.y = pt.y + extra_offs_y;
 }
 
 /**
@@ -708,29 +709,30 @@ void AddSortableSpriteToDraw(SpriteID image, PaletteID pal, int x, int y, int w,
 		return;
 	}
 
-	ParentSpriteToDraw *ps = _vd.parent_sprites_to_draw.Append();
-	ps->x = tmp_x;
-	ps->y = tmp_y;
+	/*C++17: ParentSpriteToDraw &ps = */ _vd.parent_sprites_to_draw.emplace_back();
+	ParentSpriteToDraw &ps = _vd.parent_sprites_to_draw.back();
+	ps.x = tmp_x;
+	ps.y = tmp_y;
 
-	ps->left = tmp_left;
-	ps->top  = tmp_top;
+	ps.left = tmp_left;
+	ps.top  = tmp_top;
 
-	ps->image = image;
-	ps->pal = pal;
-	ps->sub = sub;
-	ps->xmin = x + bb_offset_x;
-	ps->xmax = x + max(bb_offset_x, w) - 1;
+	ps.image = image;
+	ps.pal = pal;
+	ps.sub = sub;
+	ps.xmin = x + bb_offset_x;
+	ps.xmax = x + max(bb_offset_x, w) - 1;
 
-	ps->ymin = y + bb_offset_y;
-	ps->ymax = y + max(bb_offset_y, h) - 1;
+	ps.ymin = y + bb_offset_y;
+	ps.ymax = y + max(bb_offset_y, h) - 1;
 
-	ps->zmin = z + bb_offset_z;
-	ps->zmax = z + max(bb_offset_z, dz) - 1;
+	ps.zmin = z + bb_offset_z;
+	ps.zmax = z + max(bb_offset_z, dz) - 1;
 
-	ps->comparison_done = false;
-	ps->first_child = -1;
+	ps.comparison_done = false;
+	ps.first_child = -1;
 
-	_vd.last_child = &ps->first_child;
+	_vd.last_child = &ps.first_child;
 
 	if (_vd.combine_sprites == SPRITE_COMBINE_PENDING) _vd.combine_sprites = SPRITE_COMBINE_ACTIVE;
 }
@@ -826,33 +828,35 @@ void AddChildSpriteScreen(SpriteID image, PaletteID pal, int x, int y, bool tran
 
 	*_vd.last_child = _vd.child_screen_sprites_to_draw.size();
 
-	ChildScreenSpriteToDraw *cs = _vd.child_screen_sprites_to_draw.Append();
-	cs->image = image;
-	cs->pal = pal;
-	cs->sub = sub;
-	cs->x = scale ? x * ZOOM_LVL_BASE : x;
-	cs->y = scale ? y * ZOOM_LVL_BASE : y;
-	cs->next = -1;
+	/*C++17: ChildScreenSpriteToDraw &cs = */ _vd.child_screen_sprites_to_draw.emplace_back();
+	ChildScreenSpriteToDraw &cs = _vd.child_screen_sprites_to_draw.back();
+	cs.image = image;
+	cs.pal = pal;
+	cs.sub = sub;
+	cs.x = scale ? x * ZOOM_LVL_BASE : x;
+	cs.y = scale ? y * ZOOM_LVL_BASE : y;
+	cs.next = -1;
 
 	/* Append the sprite to the active ChildSprite list.
 	 * If the active ParentSprite is a foundation, update last_foundation_child as well.
 	 * Note: ChildSprites of foundations are NOT sequential in the vector, as selection sprites are added at last. */
-	if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs->next;
-	if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs->next;
-	_vd.last_child = &cs->next;
+	if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs.next;
+	if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs.next;
+	_vd.last_child = &cs.next;
 }
 
 static void AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2, Colours colour, uint16 width)
 {
 	assert(width != 0);
-	StringSpriteToDraw *ss = _vd.string_sprites_to_draw.Append();
-	ss->string = string;
-	ss->x = x;
-	ss->y = y;
-	ss->params[0] = params_1;
-	ss->params[1] = params_2;
-	ss->width = width;
-	ss->colour = colour;
+	/*C++17: StringSpriteToDraw &ss = */ _vd.string_sprites_to_draw.emplace_back();
+	StringSpriteToDraw &ss = _vd.string_sprites_to_draw.back();
+	ss.string = string;
+	ss.x = x;
+	ss.y = y;
+	ss.params[0] = params_1;
+	ss.params[1] = params_2;
+	ss.width = width;
+	ss.colour = colour;
 }
 
 
@@ -1588,7 +1592,7 @@ void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom
 
 	ParentSpriteToDraw *psd_end = _vd.parent_sprites_to_draw.End();
 	for (ParentSpriteToDraw *it = _vd.parent_sprites_to_draw.Begin(); it != psd_end; it++) {
-		*_vd.parent_sprites_to_sort.Append() = it;
+		_vd.parent_sprites_to_sort.push_back(it);
 	}
 
 	_vp_sprite_sorter(&_vd.parent_sprites_to_sort);
diff --git a/src/widgets/dropdown.cpp b/src/widgets/dropdown.cpp
index 6acbd79c2..33d59effc 100644
--- a/src/widgets/dropdown.cpp
+++ b/src/widgets/dropdown.cpp
@@ -509,7 +509,7 @@ void ShowDropDownMenu(Window *w, const StringID *strings, int selected, int butt
 
 	for (uint i = 0; strings[i] != INVALID_STRING_ID; i++) {
 		if (!HasBit(hidden_mask, i)) {
-			*list->Append() = new DropDownListStringItem(strings[i], i, HasBit(disabled_mask, i));
+			list->push_back(new DropDownListStringItem(strings[i], i, HasBit(disabled_mask, i)));
 		}
 	}
 
diff --git a/src/window.cpp b/src/window.cpp
index 471ac08a2..a8d1ce75e 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -109,7 +109,7 @@ WindowDesc::WindowDesc(WindowPosition def_pos, const char *ini_key, int16 def_wi
 	default_height_trad(def_height_trad)
 {
 	if (_window_descs == NULL) _window_descs = new SmallVector<WindowDesc*, 16>();
-	*_window_descs->Append() = this;
+	_window_descs->push_back(this);
 }
 
 WindowDesc::~WindowDesc()
@@ -3242,7 +3242,7 @@ void Window::InvalidateData(int data, bool gui_scope)
 	this->SetDirty();
 	if (!gui_scope) {
 		/* Schedule GUI-scope invalidation for next redraw. */
-		*this->scheduled_invalidation_data.Append() = data;
+		this->scheduled_invalidation_data.push_back(data);
 	}
 	this->OnInvalidateData(data, gui_scope);
 }