Merge bd9d785695 into 67e56391c7

`AirportMovingDataFlag` was changed to use `enum class` naming style, but wasn't actually changed to be `enum class`.

src/airport.h

@@ -44,7 +44,7 @@ enum AirportTypes : uint8_t {
 };
 
 /** Flags for airport movement data. */
-enum AirportMovingDataFlag : uint8_t {
+enum class AirportMovingDataFlag : uint8_t {
 	NoSpeedClamp, ///< No speed restrictions.
 	Takeoff, ///< Takeoff movement.
 	SlowTurn, ///< Turn slowly (mostly used in the air).

src/lang/english.txt

@@ -5001,6 +5001,7 @@ STR_ERROR_FLAT_LAND_REQUIRED                                    :{WHITE}Flat lan
 STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION                        :{WHITE}Land sloped in wrong direction
 STR_ERROR_CAN_T_DO_THIS                                         :{WHITE}Can't do this...
 STR_ERROR_BUILDING_MUST_BE_DEMOLISHED                           :{WHITE}Building must be demolished first
+STR_ERROR_BUILDING_IS_PROTECTED                                 :{WHITE}... building is protected
 STR_ERROR_CAN_T_CLEAR_THIS_AREA                                 :{WHITE}Can't clear this area...
 STR_ERROR_SITE_UNSUITABLE                                       :{WHITE}... site unsuitable
 STR_ERROR_ALREADY_BUILT                                         :{WHITE}... already built

src/string.cpp

@@ -607,28 +607,25 @@ bool ConvertHexToBytes(std::string_view hex, std::span<uint8_t> bytes)
 /** String iterator using ICU as a backend. */
 class IcuStringIterator : public StringIterator
 {
-	icu::BreakIterator *char_itr; ///< ICU iterator for characters.
-	icu::BreakIterator *word_itr; ///< ICU iterator for words.
+	std::unique_ptr<icu::BreakIterator> char_itr; ///< ICU iterator for characters.
+	std::unique_ptr<icu::BreakIterator> word_itr; ///< ICU iterator for words.
 
 	std::vector<UChar> utf16_str;      ///< UTF-16 copy of the string.
 	std::vector<size_t> utf16_to_utf8; ///< Mapping from UTF-16 code point position to index in the UTF-8 source string.
 
 public:
-	IcuStringIterator() : char_itr(nullptr), word_itr(nullptr)
+	IcuStringIterator()
 	{
 		UErrorCode status = U_ZERO_ERROR;
-		this->char_itr = icu::BreakIterator::createCharacterInstance(icu::Locale(_current_language != nullptr ? _current_language->isocode : "en"), status);
-		this->word_itr = icu::BreakIterator::createWordInstance(icu::Locale(_current_language != nullptr ? _current_language->isocode : "en"), status);
+		auto locale = icu::Locale(_current_language != nullptr ? _current_language->isocode : "en");
+		this->char_itr.reset(icu::BreakIterator::createCharacterInstance(locale, status));
+		this->word_itr.reset(icu::BreakIterator::createWordInstance(locale, status));
 
 		this->utf16_str.push_back('\0');
 		this->utf16_to_utf8.push_back(0);
 	}
 
-	~IcuStringIterator() override
-	{
-		delete this->char_itr;
-		delete this->word_itr;
-	}
+	~IcuStringIterator() override = default;
 
 	void SetString(std::string_view s) override
 	{

src/town_cmd.cpp

@@ -710,7 +710,7 @@ static void TileLoop_Town(TileIndex tile)
 static CommandCost ClearTile_Town(TileIndex tile, DoCommandFlags flags)
 {
 	if (flags.Test(DoCommandFlag::Auto)) return CommandCost(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
-	if (!CanDeleteHouse(tile)) return CMD_ERROR;
+	if (!CanDeleteHouse(tile)) return CommandCost(STR_ERROR_BUILDING_IS_PROTECTED);
 
 	const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
 
@@ -724,7 +724,7 @@ static CommandCost ClearTile_Town(TileIndex tile, DoCommandFlags flags)
 		if (!_cheats.magic_bulldozer.value && !flags.Test(DoCommandFlag::NoTestTownRating)) {
 			/* NewGRFs can add indestructible houses. */
 			if (rating > RATING_MAXIMUM) {
-				return CommandCost(CMD_ERROR);
+				return CommandCost(STR_ERROR_BUILDING_IS_PROTECTED);
 			}
 			/* If town authority controls removal, check the company's rating. */
 			if (rating > t->ratings[_current_company] && _settings_game.difficulty.town_council_tolerance != TOWN_COUNCIL_PERMISSIVE) {