Cleanup: Replace FOR_ALL_SORTED_RAILTYPES macro with range iterator.

(cherry picked from commit 3b3d80c8ef)

src/company_gui.cpp

@@ -1902,8 +1902,7 @@ struct CompanyInfrastructureWindow : Window
 
 				size->width = std::max(size->width, GetStringBoundingBox(STR_COMPANY_INFRASTRUCTURE_VIEW_RAIL_SECT).width);
 
-				RailType rt;
-				FOR_ALL_SORTED_RAILTYPES(rt) {
+				for (const auto &rt : _sorted_railtypes) {
 					if (HasBit(this->railtypes, rt)) {
 						lines++;
 						SetDParam(0, GetRailTypeInfo(rt)->strings.name);
@@ -2035,8 +2034,7 @@ struct CompanyInfrastructureWindow : Window
 
 				if (this->railtypes != RAILTYPES_NONE) {
 					/* Draw name of each valid railtype. */
-					RailType rt;
-					FOR_ALL_SORTED_RAILTYPES(rt) {
+					for (const auto &rt : _sorted_railtypes) {
 						if (HasBit(this->railtypes, rt)) {
 							SetDParam(0, GetRailTypeInfo(rt)->strings.name);
 							DrawString(r.left + offs_left, r.right - offs_right, y += FONT_HEIGHT_NORMAL, STR_WHITE_STRING);
@@ -2053,8 +2051,7 @@ struct CompanyInfrastructureWindow : Window
 			case WID_CI_RAIL_COUNT: {
 				/* Draw infrastructure count for each valid railtype. */
 				uint32 rail_total = c->infrastructure.GetRailTotal();
-				RailType rt;
-				FOR_ALL_SORTED_RAILTYPES(rt) {
+				for (const auto &rt : _sorted_railtypes) {
 					if (HasBit(this->railtypes, rt)) {
 						this->DrawCountLine(r, y, c->infrastructure.rail[rt], RailMaintenanceCost(rt, c->infrastructure.rail[rt], rail_total));
 					}

src/rail.h

@@ -497,12 +497,6 @@ RailType AllocateRailType(RailTypeLabel label);
 extern std::vector<RailType> _sorted_railtypes;
 extern RailTypes _railtypes_hidden_mask;
 
-/**
- * Loop header for iterating over railtypes, sorted by sortorder.
- * @param var Railtype.
- */
-#define FOR_ALL_SORTED_RAILTYPES(var) for (uint8 index = 0; index < _sorted_railtypes.size() && (var = _sorted_railtypes[index], true) ; index++)
-
 /** Enum holding the signal offset in the sprite sheet according to the side it is representing. */
 enum SignalOffsets {
 	SIGNAL_TO_SOUTHWEST,

src/rail_gui.cpp

@@ -2400,17 +2400,16 @@ DropDownList GetRailTypeDropDownList(bool for_replacement, bool all_option)
 	}
 
 	Dimension d = { 0, 0 };
-	RailType rt;
 	/* Get largest icon size, to ensure text is aligned on each menu item. */
 	if (!for_replacement) {
-		FOR_ALL_SORTED_RAILTYPES(rt) {
+		for (const auto &rt : _sorted_railtypes) {
 			if (!HasBit(used_railtypes, rt)) continue;
 			const RailtypeInfo *rti = GetRailTypeInfo(rt);
 			d = maxdim(d, GetSpriteSize(rti->gui_sprites.build_x_rail));
 		}
 	}
 
-	FOR_ALL_SORTED_RAILTYPES(rt) {
+	for (const auto &rt : _sorted_railtypes) {
 		/* If it's not used ever, don't show it to the user. */
 		if (!HasBit(used_railtypes, rt)) continue;