Meta: Do not hard-code index types for UCD/CLDR/TZDB code generators

Hand-picking the smallest index type that fits a particular generated
array started with commit 3ad159537e6e59760ed6b2ac2feba3fbcd8481af. This
was to reduce the size of the generated library.

Since then, the number of types using UniqueStorage has grown a ton,
creating a long list of types for which index types are manually picked.
When a new UCD/CLDR/TZDB is released, and the current index type no
longer fits the generated data, we fail to generate. Tracking down which
index caused the failure is a pretty annoying process.

Instead, we can just use size_t while in the generators themselves, then
automatically pick the size needed for the generated code.

9 files changed, 268 insertions, 379 deletions

diff --git a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateDateTimeFormatData.cpp b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateDateTimeFormatData.cpp
index d8d6dc0527..34083106cb 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateDateTimeFormatData.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateDateTimeFormatData.cpp
@@ -27,54 +27,6 @@
 #include <LibLocale/DateTimeFormat.h>
 #include <LibTimeZone/TimeZone.h>
 
-using StringIndexType = u16;
-constexpr auto s_string_index_type = "u16"sv;
-
-using CalendarPatternIndexType = u16;
-constexpr auto s_calendar_pattern_index_type = "u16"sv;
-
-using CalendarPatternListIndexType = u8;
-constexpr auto s_calendar_pattern_list_index_type = "u8"sv;
-
-using CalendarRangePatternIndexType = u16;
-constexpr auto s_calendar_range_pattern_index_type = "u16"sv;
-
-using CalendarRangePatternListIndexType = u16;
-constexpr auto s_calendar_range_pattern_list_index_type = "u16"sv;
-
-using CalendarFormatIndexType = u8;
-constexpr auto s_calendar_format_index_type = "u8"sv;
-
-using SymbolListIndexType = u16;
-constexpr auto s_symbol_list_index_type = "u16"sv;
-
-using CalendarSymbolsIndexType = u16;
-constexpr auto s_calendar_symbols_index_type = "u16"sv;
-
-using CalendarSymbolsListIndexType = u8;
-constexpr auto s_calendar_symbols_list_index_type = "u8"sv;
-
-using CalendarIndexType = u8;
-constexpr auto s_calendar_index_type = "u8"sv;
-
-using TimeZoneNamesIndexType = u16;
-constexpr auto s_time_zone_index_type = "u16"sv;
-
-using TimeZoneNamesListIndexType = u8;
-constexpr auto s_time_zone_list_index_type = "u8"sv;
-
-using TimeZoneFormatIndexType = u8;
-constexpr auto s_time_zone_format_index_type = "u8"sv;
-
-using DayPeriodIndexType = u8;
-constexpr auto s_day_period_index_type = "u8"sv;
-
-using DayPeriodListIndexType = u8;
-constexpr auto s_day_period_list_index_type = "u8"sv;
-
-using HourCycleListIndexType = u8;
-constexpr auto s_hour_cycle_list_index_type = "u8"sv;
-
 struct CalendarPattern : public Locale::CalendarPattern {
     bool contains_only_date_fields() const
     {
@@ -131,9 +83,9 @@ struct CalendarPattern : public Locale::CalendarPattern {
             && (time_zone_name == other.time_zone_name);
     }
 
-    StringIndexType skeleton_index { 0 };
-    StringIndexType pattern_index { 0 };
-    StringIndexType pattern12_index { 0 };
+    size_t skeleton_index { 0 };
+    size_t pattern_index { 0 };
+    size_t pattern12_index { 0 };
 };
 
 template<>
@@ -196,9 +148,9 @@ struct CalendarRangePattern : public CalendarPattern {
     }
 
     Optional<Locale::CalendarRangePattern::Field> field {};
-    StringIndexType start_range { 0 };
-    StringIndexType separator { 0 };
-    StringIndexType end_range { 0 };
+    size_t start_range { 0 };
+    size_t separator { 0 };
+    size_t end_range { 0 };
 };
 
 template<>
@@ -254,10 +206,10 @@ struct CalendarFormat {
             && (short_format == other.short_format);
     }
 
-    CalendarPatternIndexType full_format { 0 };
-    CalendarPatternIndexType long_format { 0 };
-    CalendarPatternIndexType medium_format { 0 };
-    CalendarPatternIndexType short_format { 0 };
+    size_t full_format { 0 };
+    size_t long_format { 0 };
+    size_t medium_format { 0 };
+    size_t short_format { 0 };
 };
 
 template<>
@@ -278,7 +230,7 @@ struct AK::Traits<CalendarFormat> : public GenericTraits<CalendarFormat> {
     static unsigned hash(CalendarFormat const& c) { return c.hash(); }
 };
 
-using SymbolList = Vector<StringIndexType>;
+using SymbolList = Vector<size_t>;
 
 struct CalendarSymbols {
     unsigned hash() const
@@ -295,9 +247,9 @@ struct CalendarSymbols {
             && (long_symbols == other.long_symbols);
     }
 
-    SymbolListIndexType narrow_symbols { 0 };
-    SymbolListIndexType short_symbols { 0 };
-    SymbolListIndexType long_symbols { 0 };
+    size_t narrow_symbols { 0 };
+    size_t short_symbols { 0 };
+    size_t long_symbols { 0 };
 };
 
 template<>
@@ -317,9 +269,9 @@ struct AK::Traits<CalendarSymbols> : public GenericTraits<CalendarSymbols> {
     static unsigned hash(CalendarSymbols const& c) { return c.hash(); }
 };
 
-using CalendarPatternList = Vector<CalendarPatternIndexType>;
-using CalendarRangePatternList = Vector<CalendarRangePatternIndexType>;
-using CalendarSymbolsList = Vector<CalendarSymbolsIndexType>;
+using CalendarPatternList = Vector<size_t>;
+using CalendarRangePatternList = Vector<size_t>;
+using CalendarSymbolsList = Vector<size_t>;
 
 struct Calendar {
     unsigned hash() const
@@ -347,16 +299,16 @@ struct Calendar {
             && (symbols == other.symbols);
     }
 
-    CalendarFormatIndexType date_formats { 0 };
-    CalendarFormatIndexType time_formats { 0 };
-    CalendarFormatIndexType date_time_formats { 0 };
-    CalendarPatternListIndexType available_formats { 0 };
+    size_t date_formats { 0 };
+    size_t time_formats { 0 };
+    size_t date_time_formats { 0 };
+    size_t available_formats { 0 };
 
-    CalendarRangePatternIndexType default_range_format { 0 };
-    CalendarRangePatternListIndexType range_formats { 0 };
-    CalendarRangePatternListIndexType range12_formats { 0 };
+    size_t default_range_format { 0 };
+    size_t range_formats { 0 };
+    size_t range12_formats { 0 };
 
-    CalendarSymbolsListIndexType symbols { 0 };
+    size_t symbols { 0 };
 };
 
 template<>
@@ -403,14 +355,14 @@ struct TimeZoneNames {
             && (long_generic_name == other.long_generic_name);
     }
 
-    StringIndexType short_standard_name { 0 };
-    StringIndexType long_standard_name { 0 };
+    size_t short_standard_name { 0 };
+    size_t long_standard_name { 0 };
 
-    StringIndexType short_daylight_name { 0 };
-    StringIndexType long_daylight_name { 0 };
+    size_t short_daylight_name { 0 };
+    size_t long_daylight_name { 0 };
 
-    StringIndexType short_generic_name { 0 };
-    StringIndexType long_generic_name { 0 };
+    size_t short_generic_name { 0 };
+    size_t long_generic_name { 0 };
 };
 
 template<>
@@ -455,14 +407,14 @@ struct TimeZoneFormat {
             && (gmt_zero_format == other.gmt_zero_format);
     }
 
-    StringIndexType symbol_ahead_sign { 0 };
-    StringIndexType symbol_ahead_separator { 0 };
+    size_t symbol_ahead_sign { 0 };
+    size_t symbol_ahead_separator { 0 };
 
-    StringIndexType symbol_behind_sign { 0 };
-    StringIndexType symbol_behind_separator { 0 };
+    size_t symbol_behind_sign { 0 };
+    size_t symbol_behind_separator { 0 };
 
-    StringIndexType gmt_format { 0 };
-    StringIndexType gmt_zero_format { 0 };
+    size_t gmt_format { 0 };
+    size_t gmt_zero_format { 0 };
 };
 
 template<>
@@ -522,8 +474,8 @@ struct AK::Traits<DayPeriod> : public GenericTraits<DayPeriod> {
     static unsigned hash(DayPeriod const& d) { return d.hash(); }
 };
 
-using TimeZoneNamesList = Vector<TimeZoneNamesIndexType>;
-using DayPeriodList = Vector<DayPeriodIndexType>;
+using TimeZoneNamesList = Vector<size_t>;
+using DayPeriodList = Vector<size_t>;
 using HourCycleList = Vector<Locale::HourCycle>;
 
 template<>
@@ -535,35 +487,35 @@ struct AK::Formatter<Locale::HourCycle> : Formatter<FormatString> {
 };
 
 struct LocaleData {
-    HashMap<String, CalendarIndexType> calendars;
+    HashMap<String, size_t> calendars;
 
-    TimeZoneNamesListIndexType time_zones { 0 };
-    TimeZoneFormatIndexType time_zone_formats { 0 };
+    size_t time_zones { 0 };
+    size_t time_zone_formats { 0 };
 
-    DayPeriodListIndexType day_periods { 0 };
+    size_t day_periods { 0 };
 };
 
 struct CLDR {
-    UniqueStringStorage<StringIndexType> unique_strings;
-    UniqueStorage<CalendarPattern, CalendarPatternIndexType> unique_patterns;
-    UniqueStorage<CalendarPatternList, CalendarPatternListIndexType> unique_pattern_lists;
-    UniqueStorage<CalendarRangePattern, CalendarRangePatternIndexType> unique_range_patterns;
-    UniqueStorage<CalendarRangePatternList, CalendarRangePatternListIndexType> unique_range_pattern_lists;
-    UniqueStorage<CalendarFormat, CalendarFormatIndexType> unique_formats;
-    UniqueStorage<SymbolList, SymbolListIndexType> unique_symbol_lists;
-    UniqueStorage<CalendarSymbols, CalendarSymbolsIndexType> unique_calendar_symbols;
-    UniqueStorage<CalendarSymbolsList, CalendarSymbolsListIndexType> unique_calendar_symbols_lists;
-    UniqueStorage<Calendar, CalendarIndexType> unique_calendars;
-    UniqueStorage<TimeZoneNames, TimeZoneNamesIndexType> unique_time_zones;
-    UniqueStorage<TimeZoneNamesList, TimeZoneNamesListIndexType> unique_time_zone_lists;
-    UniqueStorage<TimeZoneFormat, TimeZoneFormatIndexType> unique_time_zone_formats;
-    UniqueStorage<DayPeriod, DayPeriodIndexType> unique_day_periods;
-    UniqueStorage<DayPeriodList, DayPeriodListIndexType> unique_day_period_lists;
-    UniqueStorage<HourCycleList, HourCycleListIndexType> unique_hour_cycle_lists;
+    UniqueStringStorage unique_strings;
+    UniqueStorage<CalendarPattern> unique_patterns;
+    UniqueStorage<CalendarPatternList> unique_pattern_lists;
+    UniqueStorage<CalendarRangePattern> unique_range_patterns;
+    UniqueStorage<CalendarRangePatternList> unique_range_pattern_lists;
+    UniqueStorage<CalendarFormat> unique_formats;
+    UniqueStorage<SymbolList> unique_symbol_lists;
+    UniqueStorage<CalendarSymbols> unique_calendar_symbols;
+    UniqueStorage<CalendarSymbolsList> unique_calendar_symbols_lists;
+    UniqueStorage<Calendar> unique_calendars;
+    UniqueStorage<TimeZoneNames> unique_time_zones;
+    UniqueStorage<TimeZoneNamesList> unique_time_zone_lists;
+    UniqueStorage<TimeZoneFormat> unique_time_zone_formats;
+    UniqueStorage<DayPeriod> unique_day_periods;
+    UniqueStorage<DayPeriodList> unique_day_period_lists;
+    UniqueStorage<HourCycleList> unique_hour_cycle_lists;
 
     HashMap<String, LocaleData> locales;
 
-    HashMap<String, HourCycleListIndexType> hour_cycles;
+    HashMap<String, size_t> hour_cycles;
     Vector<String> hour_cycle_regions;
 
     HashMap<String, u8> minimum_days;
@@ -1035,7 +987,7 @@ static Optional<CalendarPattern> parse_date_time_pattern_raw(String pattern, Str
     return format;
 }
 
-static Optional<CalendarPatternIndexType> parse_date_time_pattern(String pattern, String skeleton, CLDR& cldr)
+static Optional<size_t> parse_date_time_pattern(String pattern, String skeleton, CLDR& cldr)
 {
     auto format = parse_date_time_pattern_raw(move(pattern), move(skeleton), cldr);
     if (!format.has_value())
@@ -1241,7 +1193,7 @@ static void generate_missing_patterns(Calendar& calendar, CalendarPatternList& f
 
     for (auto const& date_format : date_formats) {
         auto const& date_time_formats = cldr.unique_formats.get(calendar.date_time_formats);
-        CalendarPatternIndexType date_time_format_index = 0;
+        size_t date_time_format_index = 0;
 
         if (date_format.month == Locale::CalendarPatternStyle::Long) {
             if (date_format.weekday.has_value())
@@ -1534,7 +1486,7 @@ static ErrorOr<void> parse_time_zone_names(String locale_time_zone_names_path, C
     if (meta_zone_object.is_null())
         return {};
 
-    auto parse_name = [&](StringView type, JsonObject const& meta_zone_object, StringView key) -> Optional<StringIndexType> {
+    auto parse_name = [&](StringView type, JsonObject const& meta_zone_object, StringView key) -> Optional<size_t> {
         auto const& names = meta_zone_object.get(type);
         if (!names.is_object())
             return {};
@@ -1690,7 +1642,7 @@ static ErrorOr<void> parse_all_locales(String core_path, String dates_path, CLDR
     auto dates_iterator = TRY(path_to_dir_iterator(move(dates_path)));
 
     auto remove_variants_from_path = [&](String path) -> ErrorOr<String> {
-        auto parsed_locale = TRY(CanonicalLanguageID<StringIndexType>::parse(cldr.unique_strings, LexicalPath::basename(path)));
+        auto parsed_locale = TRY(CanonicalLanguageID::parse(cldr.unique_strings, LexicalPath::basename(path)));
 
         StringBuilder builder;
         builder.append(cldr.unique_strings.get(parsed_locale.language));
@@ -1765,20 +1717,20 @@ static ErrorOr<void> generate_unicode_locale_implementation(Core::Stream::Buffer
 {
     StringBuilder builder;
     SourceGenerator generator { builder };
-    generator.set("string_index_type"sv, s_string_index_type);
-    generator.set("calendar_pattern_index_type"sv, s_calendar_pattern_index_type);
-    generator.set("calendar_pattern_list_index_type"sv, s_calendar_pattern_list_index_type);
-    generator.set("calendar_range_pattern_index_type"sv, s_calendar_range_pattern_index_type);
-    generator.set("calendar_range_pattern_list_index_type"sv, s_calendar_range_pattern_list_index_type);
-    generator.set("calendar_format_index_type"sv, s_calendar_format_index_type);
-    generator.set("symbol_list_index_type"sv, s_symbol_list_index_type);
-    generator.set("calendar_symbols_index_type"sv, s_calendar_symbols_index_type);
-    generator.set("calendar_symbols_list_index_type"sv, s_calendar_symbols_list_index_type);
-    generator.set("calendar_index_type"sv, s_calendar_index_type);
-    generator.set("time_zone_index_type"sv, s_time_zone_index_type);
-    generator.set("time_zone_list_index_type"sv, s_time_zone_list_index_type);
-    generator.set("day_period_index_type"sv, s_day_period_index_type);
-    generator.set("day_period_list_index_type"sv, s_day_period_list_index_type);
+    generator.set("string_index_type"sv, cldr.unique_strings.type_that_fits());
+    generator.set("calendar_pattern_index_type"sv, cldr.unique_patterns.type_that_fits());
+    generator.set("calendar_pattern_list_index_type"sv, cldr.unique_pattern_lists.type_that_fits());
+    generator.set("calendar_range_pattern_index_type"sv, cldr.unique_range_patterns.type_that_fits());
+    generator.set("calendar_range_pattern_list_index_type"sv, cldr.unique_range_pattern_lists.type_that_fits());
+    generator.set("calendar_format_index_type"sv, cldr.unique_formats.type_that_fits());
+    generator.set("symbol_list_index_type"sv, cldr.unique_symbol_lists.type_that_fits());
+    generator.set("calendar_symbols_index_type"sv, cldr.unique_calendar_symbols.type_that_fits());
+    generator.set("calendar_symbols_list_index_type"sv, cldr.unique_calendar_symbols_lists.type_that_fits());
+    generator.set("calendar_index_type"sv, cldr.unique_calendars.type_that_fits());
+    generator.set("time_zone_index_type"sv, cldr.unique_time_zones.type_that_fits());
+    generator.set("time_zone_list_index_type"sv, cldr.unique_time_zone_lists.type_that_fits());
+    generator.set("day_period_index_type"sv, cldr.unique_day_periods.type_that_fits());
+    generator.set("day_period_list_index_type"sv, cldr.unique_day_period_lists.type_that_fits());
 
     generator.append(R"~~~(
 #include <AK/Array.h>
@@ -1889,9 +1841,9 @@ struct CalendarRangePatternImpl {
 )~~~");
 
     cldr.unique_patterns.generate(generator, "CalendarPatternImpl"sv, "s_calendar_patterns"sv, 10);
-    cldr.unique_pattern_lists.generate(generator, s_calendar_pattern_index_type, "s_calendar_pattern_lists"sv);
+    cldr.unique_pattern_lists.generate(generator, cldr.unique_patterns.type_that_fits(), "s_calendar_pattern_lists"sv);
     cldr.unique_range_patterns.generate(generator, "CalendarRangePatternImpl"sv, "s_calendar_range_patterns"sv, 10);
-    cldr.unique_range_pattern_lists.generate(generator, s_calendar_range_pattern_index_type, "s_calendar_range_pattern_lists"sv);
+    cldr.unique_range_pattern_lists.generate(generator, cldr.unique_range_patterns.type_that_fits(), "s_calendar_range_pattern_lists"sv);
 
     generator.append(R"~~~(
 struct CalendarFormatImpl {
@@ -1974,16 +1926,16 @@ struct DayPeriodData {
 )~~~");
 
     cldr.unique_formats.generate(generator, "CalendarFormatImpl"sv, "s_calendar_formats"sv, 10);
-    cldr.unique_symbol_lists.generate(generator, s_string_index_type, "s_symbol_lists"sv);
+    cldr.unique_symbol_lists.generate(generator, cldr.unique_strings.type_that_fits(), "s_symbol_lists"sv);
     cldr.unique_calendar_symbols.generate(generator, "CalendarSymbols"sv, "s_calendar_symbols"sv, 10);
-    cldr.unique_calendar_symbols_lists.generate(generator, s_calendar_symbols_index_type, "s_calendar_symbol_lists"sv);
+    cldr.unique_calendar_symbols_lists.generate(generator, cldr.unique_calendar_symbols.type_that_fits(), "s_calendar_symbol_lists"sv);
     cldr.unique_calendars.generate(generator, "CalendarData"sv, "s_calendars"sv, 10);
     cldr.unique_time_zones.generate(generator, "TimeZoneNames"sv, "s_time_zones"sv, 30);
-    cldr.unique_time_zone_lists.generate(generator, s_time_zone_index_type, "s_time_zone_lists"sv);
+    cldr.unique_time_zone_lists.generate(generator, cldr.unique_time_zones.type_that_fits(), "s_time_zone_lists"sv);
     cldr.unique_time_zone_formats.generate(generator, "TimeZoneFormatImpl"sv, "s_time_zone_formats"sv, 30);
     cldr.unique_day_periods.generate(generator, "DayPeriodData"sv, "s_day_periods"sv, 30);
-    cldr.unique_day_period_lists.generate(generator, s_day_period_index_type, "s_day_period_lists"sv);
-    cldr.unique_hour_cycle_lists.generate(generator, "u8"sv, "s_hour_cycle_lists"sv);
+    cldr.unique_day_period_lists.generate(generator, cldr.unique_day_periods.type_that_fits(), "s_day_period_lists"sv);
+    cldr.unique_hour_cycle_lists.generate(generator, cldr.unique_hour_cycle_lists.type_that_fits(), "s_hour_cycle_lists"sv);
 
     auto append_calendars = [&](String name, auto const& calendars) {
         generator.set("name", name);
@@ -2028,11 +1980,11 @@ static constexpr Array<@type@, @size@> @name@ { {)~~~");
     auto locales = cldr.locales.keys();
     quick_sort(locales);
 
-    generate_mapping(generator, cldr.locales, s_calendar_index_type, "s_locale_calendars"sv, "s_calendars_{}"sv, format_identifier, [&](auto const& name, auto const& value) { append_calendars(name, value.calendars); });
-    append_mapping(locales, cldr.locales, s_time_zone_index_type, "s_locale_time_zones"sv, [](auto const& locale) { return locale.time_zones; });
-    append_mapping(locales, cldr.locales, s_time_zone_format_index_type, "s_locale_time_zone_formats"sv, [](auto const& locale) { return locale.time_zone_formats; });
-    append_mapping(locales, cldr.locales, s_day_period_index_type, "s_locale_day_periods"sv, [](auto const& locale) { return locale.day_periods; });
-    append_mapping(cldr.hour_cycle_regions, cldr.hour_cycles, s_hour_cycle_list_index_type, "s_hour_cycles"sv, [](auto const& hour_cycles) { return hour_cycles; });
+    generate_mapping(generator, cldr.locales, cldr.unique_calendars.type_that_fits(), "s_locale_calendars"sv, "s_calendars_{}"sv, format_identifier, [&](auto const& name, auto const& value) { append_calendars(name, value.calendars); });
+    append_mapping(locales, cldr.locales, cldr.unique_time_zones.type_that_fits(), "s_locale_time_zones"sv, [](auto const& locale) { return locale.time_zones; });
+    append_mapping(locales, cldr.locales, cldr.unique_time_zone_formats.type_that_fits(), "s_locale_time_zone_formats"sv, [](auto const& locale) { return locale.time_zone_formats; });
+    append_mapping(locales, cldr.locales, cldr.unique_day_periods.type_that_fits(), "s_locale_day_periods"sv, [](auto const& locale) { return locale.day_periods; });
+    append_mapping(cldr.hour_cycle_regions, cldr.hour_cycles, cldr.unique_hour_cycle_lists.type_that_fits(), "s_hour_cycles"sv, [](auto const& hour_cycles) { return hour_cycles; });
     append_mapping(cldr.minimum_days_regions, cldr.minimum_days, "u8"sv, "s_minimum_days"sv, [](auto minimum_days) { return minimum_days; });
     append_mapping(cldr.first_day_regions, cldr.first_day, "u8"sv, "s_first_day"sv, [](auto first_day) { return to_underlying(first_day); });
     append_mapping(cldr.weekend_start_regions, cldr.weekend_start, "u8"sv, "s_weekend_start"sv, [](auto weekend_start) { return to_underlying(weekend_start); });
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateLocaleData.cpp b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateLocaleData.cpp
index b8d69c4a99..7b338d30fb 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateLocaleData.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateLocaleData.cpp
@@ -22,42 +22,6 @@
 #include <LibCore/File.h>
 #include <LibCore/Stream.h>
 
-using StringIndexType = u32;
-constexpr auto s_string_index_type = "u32"sv;
-
-using DisplayPatternIndexType = u8;
-constexpr auto s_display_pattern_index_type = "u8"sv;
-
-using LanguageListIndexType = u8;
-constexpr auto s_language_list_index_type = "u8"sv;
-
-using TerritoryListIndexType = u8;
-constexpr auto s_territory_list_index_type = "u8"sv;
-
-using ScriptListIndexType = u8;
-constexpr auto s_script_list_index_type = "u8"sv;
-
-using CurrencyListIndexType = u16;
-constexpr auto s_currency_list_index_type = "u16"sv;
-
-using CalendarListIndexType = u8;
-constexpr auto s_calendar_list_index_type = "u8"sv;
-
-using DateFieldListIndexType = u16;
-constexpr auto s_date_field_list_index_type = "u16"sv;
-
-using KeywordListIndexType = u8;
-constexpr auto s_keyword_list_index_type = "u8"sv;
-
-using ListPatternIndexType = u16;
-constexpr auto s_list_pattern_index_type = "u16"sv;
-
-using ListPatternListIndexType = u8;
-constexpr auto s_list_pattern_list_index_type = "u8"sv;
-
-using TextLayoutIndexType = u8;
-constexpr auto s_text_layout_index_type = "u8"sv;
-
 static String format_identifier(StringView owner, String identifier)
 {
     identifier = identifier.replace("-"sv, "_"sv, ReplaceMode::All);
@@ -81,8 +45,8 @@ struct DisplayPattern {
             && (locale_separator == other.locale_separator);
     }
 
-    StringIndexType locale_pattern { 0 };
-    StringIndexType locale_separator { 0 };
+    size_t locale_pattern { 0 };
+    size_t locale_separator { 0 };
 };
 
 template<>
@@ -124,10 +88,10 @@ struct ListPatterns {
 
     StringView type;
     StringView style;
-    StringIndexType start { 0 };
-    StringIndexType middle { 0 };
-    StringIndexType end { 0 };
-    StringIndexType pair { 0 };
+    size_t start { 0 };
+    size_t middle { 0 };
+    size_t end { 0 };
+    size_t pair { 0 };
 };
 
 template<>
@@ -179,57 +143,57 @@ struct AK::Traits<TextLayout> : public GenericTraits<TextLayout> {
     static unsigned hash(TextLayout const& t) { return t.hash(); }
 };
 
-using LanguageList = Vector<StringIndexType>;
-using TerritoryList = Vector<StringIndexType>;
-using ScriptList = Vector<StringIndexType>;
-using CurrencyList = Vector<StringIndexType>;
-using CalendarList = Vector<StringIndexType>;
-using DateFieldList = Vector<StringIndexType>;
-using KeywordList = Vector<StringIndexType>;
-using ListPatternList = Vector<ListPatternIndexType>;
+using LanguageList = Vector<size_t>;
+using TerritoryList = Vector<size_t>;
+using ScriptList = Vector<size_t>;
+using CurrencyList = Vector<size_t>;
+using CalendarList = Vector<size_t>;
+using DateFieldList = Vector<size_t>;
+using KeywordList = Vector<size_t>;
+using ListPatternList = Vector<size_t>;
 
 struct LocaleData {
     String language;
     Optional<String> territory;
     Optional<String> variant;
-    DisplayPatternIndexType display_patterns { 0 };
-    LanguageListIndexType languages { 0 };
-    TerritoryListIndexType territories { 0 };
-    ScriptListIndexType scripts { 0 };
-    CurrencyListIndexType long_currencies { 0 };
-    CurrencyListIndexType short_currencies { 0 };
-    CurrencyListIndexType narrow_currencies { 0 };
-    CurrencyListIndexType numeric_currencies { 0 };
-    CalendarListIndexType calendars { 0 };
-    DateFieldListIndexType long_date_fields { 0 };
-    DateFieldListIndexType short_date_fields { 0 };
-    DateFieldListIndexType narrow_date_fields { 0 };
-    KeywordListIndexType calendar_keywords { 0 };
-    KeywordListIndexType collation_case_keywords { 0 };
-    KeywordListIndexType collation_numeric_keywords { 0 };
-    KeywordListIndexType number_system_keywords { 0 };
-    ListPatternListIndexType list_patterns { 0 };
-    TextLayoutIndexType text_layout { 0 };
+    size_t display_patterns { 0 };
+    size_t languages { 0 };
+    size_t territories { 0 };
+    size_t scripts { 0 };
+    size_t long_currencies { 0 };
+    size_t short_currencies { 0 };
+    size_t narrow_currencies { 0 };
+    size_t numeric_currencies { 0 };
+    size_t calendars { 0 };
+    size_t long_date_fields { 0 };
+    size_t short_date_fields { 0 };
+    size_t narrow_date_fields { 0 };
+    size_t calendar_keywords { 0 };
+    size_t collation_case_keywords { 0 };
+    size_t collation_numeric_keywords { 0 };
+    size_t number_system_keywords { 0 };
+    size_t list_patterns { 0 };
+    size_t text_layout { 0 };
 };
 
 struct LanguageMapping {
-    CanonicalLanguageID<StringIndexType> key {};
-    CanonicalLanguageID<StringIndexType> alias {};
+    CanonicalLanguageID key {};
+    CanonicalLanguageID alias {};
 };
 
 struct CLDR {
-    UniqueStringStorage<StringIndexType> unique_strings;
-    UniqueStorage<DisplayPattern, DisplayPatternIndexType> unique_display_patterns;
-    UniqueStorage<LanguageList, LanguageListIndexType> unique_language_lists;
-    UniqueStorage<TerritoryList, TerritoryListIndexType> unique_territory_lists;
-    UniqueStorage<ScriptList, ScriptListIndexType> unique_script_lists;
-    UniqueStorage<CurrencyList, CurrencyListIndexType> unique_currency_lists;
-    UniqueStorage<CalendarList, CalendarListIndexType> unique_calendar_lists;
-    UniqueStorage<DateFieldList, DateFieldListIndexType> unique_date_field_lists;
-    UniqueStorage<KeywordList, KeywordListIndexType> unique_keyword_lists;
-    UniqueStorage<ListPatterns, ListPatternIndexType> unique_list_patterns;
-    UniqueStorage<ListPatternList, ListPatternListIndexType> unique_list_pattern_lists;
-    UniqueStorage<TextLayout, TextLayoutIndexType> unique_text_layouts;
+    UniqueStringStorage unique_strings;
+    UniqueStorage<DisplayPattern> unique_display_patterns;
+    UniqueStorage<LanguageList> unique_language_lists;
+    UniqueStorage<TerritoryList> unique_territory_lists;
+    UniqueStorage<ScriptList> unique_script_lists;
+    UniqueStorage<CurrencyList> unique_currency_lists;
+    UniqueStorage<CalendarList> unique_calendar_lists;
+    UniqueStorage<DateFieldList> unique_date_field_lists;
+    UniqueStorage<KeywordList> unique_keyword_lists;
+    UniqueStorage<ListPatterns> unique_list_patterns;
+    UniqueStorage<ListPatternList> unique_list_pattern_lists;
+    UniqueStorage<TextLayout> unique_text_layouts;
 
     HashMap<String, LocaleData> locales;
     Vector<Alias> locale_aliases;
@@ -254,11 +218,11 @@ struct CLDR {
 
     Vector<String> list_pattern_types;
     Vector<String> character_orders;
-    HashMap<String, StringIndexType> language_aliases;
-    HashMap<String, StringIndexType> territory_aliases;
-    HashMap<String, StringIndexType> script_aliases;
-    HashMap<String, StringIndexType> variant_aliases;
-    HashMap<String, StringIndexType> subdivision_aliases;
+    HashMap<String, size_t> language_aliases;
+    HashMap<String, size_t> territory_aliases;
+    HashMap<String, size_t> script_aliases;
+    HashMap<String, size_t> variant_aliases;
+    HashMap<String, size_t> subdivision_aliases;
     Vector<LanguageMapping> complex_mappings;
     Vector<LanguageMapping> likely_subtags;
     size_t max_variant_size { 0 };
@@ -276,8 +240,8 @@ struct CLDR {
 
 static ErrorOr<LanguageMapping> parse_language_mapping(CLDR& cldr, StringView key, StringView alias)
 {
-    auto parsed_key = TRY(CanonicalLanguageID<StringIndexType>::parse(cldr.unique_strings, key));
-    auto parsed_alias = TRY(CanonicalLanguageID<StringIndexType>::parse(cldr.unique_strings, alias));
+    auto parsed_key = TRY(CanonicalLanguageID::parse(cldr.unique_strings, key));
+    auto parsed_alias = TRY(CanonicalLanguageID::parse(cldr.unique_strings, alias));
     return LanguageMapping { move(parsed_key), move(parsed_alias) };
 }
 
@@ -914,7 +878,7 @@ static ErrorOr<void> define_aliases_without_scripts(CLDR& cldr)
     };
 
     auto append_alias_without_script = [&](auto const& locale) -> ErrorOr<void> {
-        auto parsed_locale = TRY(CanonicalLanguageID<StringIndexType>::parse(cldr.unique_strings, locale));
+        auto parsed_locale = TRY(CanonicalLanguageID::parse(cldr.unique_strings, locale));
         if ((parsed_locale.language == 0) || (parsed_locale.script == 0) || (parsed_locale.region == 0))
             return {};
 
@@ -961,7 +925,7 @@ static ErrorOr<void> parse_all_locales(String bcp47_path, String core_path, Stri
     TRY(parse_likely_subtags(core_supplemental_path.string(), cldr));
 
     auto remove_variants_from_path = [&](String path) -> ErrorOr<String> {
-        auto parsed_locale = TRY(CanonicalLanguageID<StringIndexType>::parse(cldr.unique_strings, LexicalPath::basename(path)));
+        auto parsed_locale = TRY(CanonicalLanguageID::parse(cldr.unique_strings, LexicalPath::basename(path)));
 
         StringBuilder builder;
         builder.append(cldr.unique_strings.get(parsed_locale.language));
@@ -1088,9 +1052,11 @@ namespace Locale {
 
 static ErrorOr<void> generate_unicode_locale_implementation(Core::Stream::BufferedFile& file, CLDR& cldr)
 {
+    auto string_index_type = cldr.unique_strings.type_that_fits();
+
     StringBuilder builder;
     SourceGenerator generator { builder };
-    generator.set("string_index_type"sv, s_string_index_type);
+    generator.set("string_index_type"sv, string_index_type);
     generator.set("locales_size"sv, String::number(cldr.locales.size()));
     generator.set("territories_size", String::number(cldr.territories.size()));
     generator.set("variants_size", String::number(cldr.max_variant_size));
@@ -1184,15 +1150,15 @@ Span<StringView const> get_available_keyword_values(StringView key)
 )~~~");
 
     cldr.unique_display_patterns.generate(generator, "DisplayPatternImpl"sv, "s_display_patterns"sv, 30);
-    cldr.unique_language_lists.generate(generator, s_string_index_type, "s_language_lists"sv);
-    cldr.unique_territory_lists.generate(generator, s_string_index_type, "s_territory_lists"sv);
-    cldr.unique_script_lists.generate(generator, s_string_index_type, "s_script_lists"sv);
-    cldr.unique_currency_lists.generate(generator, s_string_index_type, "s_currency_lists"sv);
-    cldr.unique_calendar_lists.generate(generator, s_string_index_type, "s_calendar_lists"sv);
-    cldr.unique_date_field_lists.generate(generator, s_string_index_type, "s_date_field_lists"sv);
-    cldr.unique_keyword_lists.generate(generator, s_string_index_type, "s_keyword_lists"sv);
+    cldr.unique_language_lists.generate(generator, string_index_type, "s_language_lists"sv);
+    cldr.unique_territory_lists.generate(generator, string_index_type, "s_territory_lists"sv);
+    cldr.unique_script_lists.generate(generator, string_index_type, "s_script_lists"sv);
+    cldr.unique_currency_lists.generate(generator, string_index_type, "s_currency_lists"sv);
+    cldr.unique_calendar_lists.generate(generator, string_index_type, "s_calendar_lists"sv);
+    cldr.unique_date_field_lists.generate(generator, string_index_type, "s_date_field_lists"sv);
+    cldr.unique_keyword_lists.generate(generator, string_index_type, "s_keyword_lists"sv);
     cldr.unique_list_patterns.generate(generator, "Patterns"sv, "s_list_patterns"sv, 10);
-    cldr.unique_list_pattern_lists.generate(generator, s_list_pattern_index_type, "s_list_pattern_lists"sv);
+    cldr.unique_list_pattern_lists.generate(generator, cldr.unique_list_patterns.type_that_fits(), "s_list_pattern_lists"sv);
     cldr.unique_text_layouts.generate(generator, "TextLayout"sv, "s_text_layouts"sv, 30);
 
     auto append_index = [&](auto index) {
@@ -1239,24 +1205,24 @@ static constexpr Array<@type@, @size@> @name@ { {)~~~");
     auto locales = cldr.locales.keys();
     quick_sort(locales);
 
-    append_mapping(locales, cldr.locales, s_display_pattern_index_type, "s_locale_display_patterns"sv, [&](auto const& locale) { return locale.display_patterns; });
-    append_mapping(locales, cldr.locales, s_language_list_index_type, "s_languages"sv, [&](auto const& locale) { return locale.languages; });
-    append_mapping(locales, cldr.locales, s_territory_list_index_type, "s_territories"sv, [&](auto const& locale) { return locale.territories; });
-    append_mapping(locales, cldr.locales, s_script_list_index_type, "s_scripts"sv, [&](auto const& locale) { return locale.scripts; });
-    append_mapping(locales, cldr.locales, s_currency_list_index_type, "s_long_currencies"sv, [&](auto const& locale) { return locale.long_currencies; });
-    append_mapping(locales, cldr.locales, s_currency_list_index_type, "s_short_currencies"sv, [&](auto const& locale) { return locale.short_currencies; });
-    append_mapping(locales, cldr.locales, s_currency_list_index_type, "s_narrow_currencies"sv, [&](auto const& locale) { return locale.narrow_currencies; });
-    append_mapping(locales, cldr.locales, s_currency_list_index_type, "s_numeric_currencies"sv, [&](auto const& locale) { return locale.numeric_currencies; });
-    append_mapping(locales, cldr.locales, s_calendar_list_index_type, "s_calendars"sv, [&](auto const& locale) { return locale.calendars; });
-    append_mapping(locales, cldr.locales, s_date_field_list_index_type, "s_long_date_fields"sv, [&](auto const& locale) { return locale.long_date_fields; });
-    append_mapping(locales, cldr.locales, s_date_field_list_index_type, "s_short_date_fields"sv, [&](auto const& locale) { return locale.short_date_fields; });
-    append_mapping(locales, cldr.locales, s_date_field_list_index_type, "s_narrow_date_fields"sv, [&](auto const& locale) { return locale.narrow_date_fields; });
-    append_mapping(locales, cldr.locales, s_keyword_list_index_type, "s_calendar_keywords"sv, [&](auto const& locale) { return locale.calendar_keywords; });
-    append_mapping(locales, cldr.locales, s_keyword_list_index_type, "s_collation_case_keywords"sv, [&](auto const& locale) { return locale.collation_case_keywords; });
-    append_mapping(locales, cldr.locales, s_keyword_list_index_type, "s_collation_numeric_keywords"sv, [&](auto const& locale) { return locale.collation_numeric_keywords; });
-    append_mapping(locales, cldr.locales, s_keyword_list_index_type, "s_number_system_keywords"sv, [&](auto const& locale) { return locale.number_system_keywords; });
-    append_mapping(locales, cldr.locales, s_list_pattern_list_index_type, "s_locale_list_patterns"sv, [&](auto const& locale) { return locale.list_patterns; });
-    append_mapping(locales, cldr.locales, s_text_layout_index_type, "s_locale_text_layouts"sv, [&](auto const& locale) { return locale.text_layout; });
+    append_mapping(locales, cldr.locales, cldr.unique_display_patterns.type_that_fits(), "s_locale_display_patterns"sv, [&](auto const& locale) { return locale.display_patterns; });
+    append_mapping(locales, cldr.locales, cldr.unique_language_lists.type_that_fits(), "s_languages"sv, [&](auto const& locale) { return locale.languages; });
+    append_mapping(locales, cldr.locales, cldr.unique_territory_lists.type_that_fits(), "s_territories"sv, [&](auto const& locale) { return locale.territories; });
+    append_mapping(locales, cldr.locales, cldr.unique_script_lists.type_that_fits(), "s_scripts"sv, [&](auto const& locale) { return locale.scripts; });
+    append_mapping(locales, cldr.locales, cldr.unique_currency_lists.type_that_fits(), "s_long_currencies"sv, [&](auto const& locale) { return locale.long_currencies; });
+    append_mapping(locales, cldr.locales, cldr.unique_currency_lists.type_that_fits(), "s_short_currencies"sv, [&](auto const& locale) { return locale.short_currencies; });
+    append_mapping(locales, cldr.locales, cldr.unique_currency_lists.type_that_fits(), "s_narrow_currencies"sv, [&](auto const& locale) { return locale.narrow_currencies; });
+    append_mapping(locales, cldr.locales, cldr.unique_currency_lists.type_that_fits(), "s_numeric_currencies"sv, [&](auto const& locale) { return locale.numeric_currencies; });
+    append_mapping(locales, cldr.locales, cldr.unique_calendar_lists.type_that_fits(), "s_calendars"sv, [&](auto const& locale) { return locale.calendars; });
+    append_mapping(locales, cldr.locales, cldr.unique_date_field_lists.type_that_fits(), "s_long_date_fields"sv, [&](auto const& locale) { return locale.long_date_fields; });
+    append_mapping(locales, cldr.locales, cldr.unique_date_field_lists.type_that_fits(), "s_short_date_fields"sv, [&](auto const& locale) { return locale.short_date_fields; });
+    append_mapping(locales, cldr.locales, cldr.unique_date_field_lists.type_that_fits(), "s_narrow_date_fields"sv, [&](auto const& locale) { return locale.narrow_date_fields; });
+    append_mapping(locales, cldr.locales, cldr.unique_keyword_lists.type_that_fits(), "s_calendar_keywords"sv, [&](auto const& locale) { return locale.calendar_keywords; });
+    append_mapping(locales, cldr.locales, cldr.unique_keyword_lists.type_that_fits(), "s_collation_case_keywords"sv, [&](auto const& locale) { return locale.collation_case_keywords; });
+    append_mapping(locales, cldr.locales, cldr.unique_keyword_lists.type_that_fits(), "s_collation_numeric_keywords"sv, [&](auto const& locale) { return locale.collation_numeric_keywords; });
+    append_mapping(locales, cldr.locales, cldr.unique_keyword_lists.type_that_fits(), "s_number_system_keywords"sv, [&](auto const& locale) { return locale.number_system_keywords; });
+    append_mapping(locales, cldr.locales, cldr.unique_list_pattern_lists.type_that_fits(), "s_locale_list_patterns"sv, [&](auto const& locale) { return locale.list_patterns; });
+    append_mapping(locales, cldr.locales, cldr.unique_text_layouts.type_that_fits(), "s_locale_text_layouts"sv, [&](auto const& locale) { return locale.text_layout; });
 
     generator.append(R"~~~(
 
@@ -1485,7 +1451,7 @@ Optional<StringView> get_locale_@enum_snake@_mapping(StringView locale, StringVi
     };
 
     auto append_alias_search = [&](StringView enum_snake, auto const& aliases) {
-        HashValueMap<StringIndexType> hashes;
+        HashValueMap<size_t> hashes;
         hashes.ensure_capacity(aliases.size());
 
         for (auto const& alias : aliases)
@@ -1495,7 +1461,7 @@ Optional<StringView> get_locale_@enum_snake@_mapping(StringView locale, StringVi
         options.return_type = "StringView"sv;
         options.return_format = "decode_string({})"sv;
 
-        generate_value_from_string(generator, "resolve_{}_alias"sv, s_string_index_type, enum_snake, move(hashes), options);
+        generate_value_from_string(generator, "resolve_{}_alias"sv, string_index_type, enum_snake, move(hashes), options);
     };
 
     append_from_string("Locale"sv, "locale"sv, cldr.locales.keys(), cldr.locale_aliases);
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateNumberFormatData.cpp b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateNumberFormatData.cpp
index 237de7b33a..351c861bc9 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateNumberFormatData.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateNumberFormatData.cpp
@@ -32,24 +32,6 @@
 #include <LibLocale/PluralRules.h>
 #include <math.h>
 
-using StringIndexType = u16;
-constexpr auto s_string_index_type = "u16"sv;
-
-using NumberFormatIndexType = u16;
-constexpr auto s_number_format_index_type = "u16"sv;
-
-using NumberFormatListIndexType = u16;
-constexpr auto s_number_format_list_index_type = "u16"sv;
-
-using NumericSymbolListIndexType = u8;
-constexpr auto s_numeric_symbol_list_index_type = "u8"sv;
-
-using NumberSystemIndexType = u8;
-constexpr auto s_number_system_index_type = "u8"sv;
-
-using UnitIndexType = u16;
-constexpr auto s_unit_index_type = "u16"sv;
-
 enum class NumberFormatType {
     Standard,
     Compact,
@@ -83,10 +65,10 @@ struct NumberFormat : public Locale::NumberFormat {
             && (identifier_indices == other.identifier_indices);
     }
 
-    StringIndexType zero_format_index { 0 };
-    StringIndexType positive_format_index { 0 };
-    StringIndexType negative_format_index { 0 };
-    Vector<StringIndexType> identifier_indices {};
+    size_t zero_format_index { 0 };
+    size_t positive_format_index { 0 };
+    size_t negative_format_index { 0 };
+    Vector<size_t> identifier_indices {};
 };
 
 template<>
@@ -113,8 +95,8 @@ struct AK::Traits<NumberFormat> : public GenericTraits<NumberFormat> {
     static unsigned hash(NumberFormat const& f) { return f.hash(); }
 };
 
-using NumberFormatList = Vector<NumberFormatIndexType>;
-using NumericSymbolList = Vector<StringIndexType>;
+using NumberFormatList = Vector<size_t>;
+using NumericSymbolList = Vector<size_t>;
 
 struct NumberSystem {
     unsigned hash() const
@@ -150,22 +132,22 @@ struct NumberSystem {
             && (scientific_format == other.scientific_format);
     }
 
-    NumericSymbolListIndexType symbols { 0 };
+    size_t symbols { 0 };
 
     u8 primary_grouping_size { 0 };
     u8 secondary_grouping_size { 0 };
 
-    NumberFormatIndexType decimal_format { 0 };
-    NumberFormatListIndexType decimal_long_formats { 0 };
-    NumberFormatListIndexType decimal_short_formats { 0 };
+    size_t decimal_format { 0 };
+    size_t decimal_long_formats { 0 };
+    size_t decimal_short_formats { 0 };
 
-    NumberFormatIndexType currency_format { 0 };
-    NumberFormatIndexType accounting_format { 0 };
-    NumberFormatListIndexType currency_unit_formats { 0 };
-    NumberFormatListIndexType currency_short_formats { 0 };
+    size_t currency_format { 0 };
+    size_t accounting_format { 0 };
+    size_t currency_unit_formats { 0 };
+    size_t currency_short_formats { 0 };
 
-    NumberFormatIndexType percent_format { 0 };
-    NumberFormatIndexType scientific_format { 0 };
+    size_t percent_format { 0 };
+    size_t scientific_format { 0 };
 };
 
 template<>
@@ -212,10 +194,10 @@ struct Unit {
             && (narrow_formats == other.narrow_formats);
     }
 
-    StringIndexType unit { 0 };
-    NumberFormatListIndexType long_formats { 0 };
-    NumberFormatListIndexType short_formats { 0 };
-    NumberFormatListIndexType narrow_formats { 0 };
+    size_t unit { 0 };
+    size_t long_formats { 0 };
+    size_t short_formats { 0 };
+    size_t narrow_formats { 0 };
 };
 
 template<>
@@ -237,18 +219,18 @@ struct AK::Traits<Unit> : public GenericTraits<Unit> {
 };
 
 struct LocaleData {
-    Vector<NumberSystemIndexType> number_systems;
-    HashMap<String, UnitIndexType> units {};
+    Vector<size_t> number_systems;
+    HashMap<String, size_t> units {};
     u8 minimum_grouping_digits { 0 };
 };
 
 struct CLDR {
-    UniqueStringStorage<StringIndexType> unique_strings;
-    UniqueStorage<NumberFormat, NumberFormatIndexType> unique_formats;
-    UniqueStorage<NumberFormatList, NumberFormatListIndexType> unique_format_lists;
-    UniqueStorage<NumericSymbolList, NumericSymbolListIndexType> unique_symbols;
-    UniqueStorage<NumberSystem, NumberSystemIndexType> unique_systems;
-    UniqueStorage<Unit, UnitIndexType> unique_units;
+    UniqueStringStorage unique_strings;
+    UniqueStorage<NumberFormat> unique_formats;
+    UniqueStorage<NumberFormatList> unique_format_lists;
+    UniqueStorage<NumericSymbolList> unique_symbols;
+    UniqueStorage<NumberSystem> unique_systems;
+    UniqueStorage<Unit> unique_units;
 
     HashMap<String, Array<u32, 10>> number_system_digits;
     Vector<String> number_systems;
@@ -419,7 +401,7 @@ static void parse_number_pattern(Vector<String> patterns, CLDR& cldr, NumberForm
     format.zero_format_index = cldr.unique_strings.ensure(move(zero_format));
 }
 
-static void parse_number_pattern(Vector<String> patterns, CLDR& cldr, NumberFormatType type, NumberFormatIndexType& format_index, NumberSystem* number_system_for_groupings = nullptr)
+static void parse_number_pattern(Vector<String> patterns, CLDR& cldr, NumberFormatType type, size_t& format_index, NumberSystem* number_system_for_groupings = nullptr)
 {
     NumberFormat format {};
     parse_number_pattern(move(patterns), cldr, type, format, number_system_for_groupings);
@@ -453,7 +435,7 @@ static ErrorOr<void> parse_number_systems(String locale_numbers_path, CLDR& cldr
     };
 
     auto parse_number_format = [&](auto const& format_object) {
-        Vector<NumberFormatIndexType> result;
+        Vector<size_t> result;
         result.ensure_capacity(format_object.size());
 
         format_object.for_each_member([&](auto const& key, JsonValue const& value) {
@@ -601,7 +583,7 @@ static ErrorOr<void> parse_number_systems(String locale_numbers_path, CLDR& cldr
     locale.number_systems.ensure_capacity(number_systems.size());
 
     for (auto& number_system : number_systems) {
-        NumberSystemIndexType system_index = 0;
+        size_t system_index = 0;
         if (number_system.has_value())
             system_index = cldr.unique_systems.ensure(number_system.release_value());
 
@@ -727,7 +709,7 @@ static ErrorOr<void> parse_all_locales(String core_path, String numbers_path, St
     TRY(parse_number_system_digits(core_supplemental_path.string(), cldr));
 
     auto remove_variants_from_path = [&](String path) -> ErrorOr<String> {
-        auto parsed_locale = TRY(CanonicalLanguageID<StringIndexType>::parse(cldr.unique_strings, LexicalPath::basename(path)));
+        auto parsed_locale = TRY(CanonicalLanguageID::parse(cldr.unique_strings, LexicalPath::basename(path)));
 
         StringBuilder builder;
         builder.append(cldr.unique_strings.get(parsed_locale.language));
@@ -790,10 +772,10 @@ static ErrorOr<void> generate_unicode_locale_implementation(Core::Stream::Buffer
 {
     StringBuilder builder;
     SourceGenerator generator { builder };
-    generator.set("string_index_type"sv, s_string_index_type);
-    generator.set("number_format_index_type"sv, s_number_format_index_type);
-    generator.set("number_format_list_index_type"sv, s_number_format_list_index_type);
-    generator.set("numeric_symbol_list_index_type"sv, s_numeric_symbol_list_index_type);
+    generator.set("string_index_type"sv, cldr.unique_strings.type_that_fits());
+    generator.set("number_format_index_type"sv, cldr.unique_formats.type_that_fits());
+    generator.set("number_format_list_index_type"sv, cldr.unique_format_lists.type_that_fits());
+    generator.set("numeric_symbol_list_index_type"sv, cldr.unique_symbols.type_that_fits());
     generator.set("identifier_count", String::number(cldr.max_identifier_count));
 
     generator.append(R"~~~(
@@ -870,8 +852,8 @@ struct Unit {
 )~~~");
 
     cldr.unique_formats.generate(generator, "NumberFormatImpl"sv, "s_number_formats"sv, 10);
-    cldr.unique_format_lists.generate(generator, s_number_format_index_type, "s_number_format_lists"sv);
-    cldr.unique_symbols.generate(generator, s_string_index_type, "s_numeric_symbol_lists"sv);
+    cldr.unique_format_lists.generate(generator, cldr.unique_formats.type_that_fits(), "s_number_format_lists"sv);
+    cldr.unique_symbols.generate(generator, cldr.unique_strings.type_that_fits(), "s_numeric_symbol_lists"sv);
     cldr.unique_systems.generate(generator, "NumberSystemData"sv, "s_number_systems"sv, 10);
     cldr.unique_units.generate(generator, "Unit"sv, "s_units"sv, 10);
 
@@ -912,8 +894,8 @@ static constexpr Array<@type@, @size@> @name@ { {)~~~");
     };
 
     generate_mapping(generator, cldr.number_system_digits, "u32"sv, "s_number_systems_digits"sv, "s_number_systems_digits_{}"sv, nullptr, [&](auto const& name, auto const& value) { append_map(name, "u32"sv, value); });
-    generate_mapping(generator, cldr.locales, s_number_system_index_type, "s_locale_number_systems"sv, "s_number_systems_{}"sv, nullptr, [&](auto const& name, auto const& value) { append_map(name, s_number_system_index_type, value.number_systems); });
-    generate_mapping(generator, cldr.locales, s_unit_index_type, "s_locale_units"sv, "s_units_{}"sv, nullptr, [&](auto const& name, auto const& value) { append_map(name, s_unit_index_type, value.units); });
+    generate_mapping(generator, cldr.locales, cldr.unique_systems.type_that_fits(), "s_locale_number_systems"sv, "s_number_systems_{}"sv, nullptr, [&](auto const& name, auto const& value) { append_map(name, cldr.unique_systems.type_that_fits(), value.number_systems); });
+    generate_mapping(generator, cldr.locales, cldr.unique_units.type_that_fits(), "s_locale_units"sv, "s_units_{}"sv, nullptr, [&](auto const& name, auto const& value) { append_map(name, cldr.unique_units.type_that_fits(), value.units); });
 
     generator.append(R"~~~(
 static Optional<NumberSystem> keyword_to_number_system(KeywordNumbers keyword)
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GeneratePluralRulesData.cpp b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GeneratePluralRulesData.cpp
index 3ad8d769a3..5053862c70 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GeneratePluralRulesData.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GeneratePluralRulesData.cpp
@@ -19,8 +19,6 @@
 #include <LibCore/Stream.h>
 #include <LibLocale/PluralRules.h>
 
-using StringIndexType = u16;
-
 static String format_identifier(StringView owner, String identifier)
 {
     identifier = identifier.replace("-"sv, "_"sv, ReplaceMode::All);
@@ -214,7 +212,7 @@ struct LocaleData {
 };
 
 struct CLDR {
-    UniqueStringStorage<StringIndexType> unique_strings;
+    UniqueStringStorage unique_strings;
 
     HashMap<String, LocaleData> locales;
 };
@@ -404,7 +402,7 @@ static ErrorOr<void> parse_all_locales(String core_path, String locale_names_pat
     VERIFY(Core::File::is_directory(core_supplemental_path.string()));
 
     auto remove_variants_from_path = [&](String path) -> ErrorOr<String> {
-        auto parsed_locale = TRY(CanonicalLanguageID<StringIndexType>::parse(cldr.unique_strings, LexicalPath::basename(path)));
+        auto parsed_locale = TRY(CanonicalLanguageID::parse(cldr.unique_strings, LexicalPath::basename(path)));
 
         StringBuilder builder;
         builder.append(cldr.unique_strings.get(parsed_locale.language));
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateRelativeTimeFormatData.cpp b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateRelativeTimeFormatData.cpp
index dc2db86d33..b1bf7bdc05 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateRelativeTimeFormatData.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibLocale/GenerateRelativeTimeFormatData.cpp
@@ -20,12 +20,6 @@
 #include <LibLocale/Locale.h>
 #include <LibLocale/RelativeTimeFormat.h>
 
-using StringIndexType = u16;
-constexpr auto s_string_index_type = "u16"sv;
-
-using RelativeTimeFormatIndexType = u16;
-constexpr auto s_relative_time_format_index_type = "u16"sv;
-
 struct RelativeTimeFormat {
     unsigned hash() const
     {
@@ -49,8 +43,8 @@ struct RelativeTimeFormat {
     String time_unit;
     String style;
     String plurality;
-    StringIndexType tense_or_number { 0 };
-    StringIndexType pattern { 0 };
+    size_t tense_or_number { 0 };
+    size_t pattern { 0 };
 };
 
 template<>
@@ -73,12 +67,12 @@ struct AK::Traits<RelativeTimeFormat> : public GenericTraits<RelativeTimeFormat>
 };
 
 struct LocaleData {
-    Vector<RelativeTimeFormatIndexType> time_units;
+    Vector<size_t> time_units;
 };
 
 struct CLDR {
-    UniqueStringStorage<StringIndexType> unique_strings;
-    UniqueStorage<RelativeTimeFormat, RelativeTimeFormatIndexType> unique_formats;
+    UniqueStringStorage unique_strings;
+    UniqueStorage<RelativeTimeFormat> unique_formats;
 
     HashMap<String, LocaleData> locales;
 };
@@ -147,7 +141,7 @@ static ErrorOr<void> parse_all_locales(String dates_path, CLDR& cldr)
     auto dates_iterator = TRY(path_to_dir_iterator(move(dates_path)));
 
     auto remove_variants_from_path = [&](String path) -> ErrorOr<String> {
-        auto parsed_locale = TRY(CanonicalLanguageID<StringIndexType>::parse(cldr.unique_strings, LexicalPath::basename(path)));
+        auto parsed_locale = TRY(CanonicalLanguageID::parse(cldr.unique_strings, LexicalPath::basename(path)));
 
         StringBuilder builder;
         builder.append(cldr.unique_strings.get(parsed_locale.language));
@@ -195,8 +189,8 @@ static ErrorOr<void> generate_unicode_locale_implementation(Core::Stream::Buffer
 {
     StringBuilder builder;
     SourceGenerator generator { builder };
-    generator.set("string_index_type"sv, s_string_index_type);
-    generator.set("relative_time_format_index_type"sv, s_relative_time_format_index_type);
+    generator.set("string_index_type"sv, cldr.unique_strings.type_that_fits());
+    generator.set("relative_time_format_index_type"sv, cldr.unique_formats.type_that_fits());
 
     generator.append(R"~~~(
 #include <AK/Array.h>
@@ -250,7 +244,7 @@ static constexpr Array<@relative_time_format_index_type@, @size@> @name@ { {)~~~
         generator.append(" } };");
     };
 
-    generate_mapping(generator, cldr.locales, s_relative_time_format_index_type, "s_locale_relative_time_formats"sv, "s_number_systems_digits_{}"sv, nullptr, [&](auto const& name, auto const& value) { append_list(name, value.time_units); });
+    generate_mapping(generator, cldr.locales, cldr.unique_formats.type_that_fits(), "s_locale_relative_time_formats"sv, "s_number_systems_digits_{}"sv, nullptr, [&](auto const& name, auto const& value) { append_list(name, value.time_units); });
 
     generator.append(R"~~~(
 Vector<RelativeTimeFormat> get_relative_time_format_patterns(StringView locale, TimeUnit time_unit, StringView tense_or_number, Style style)
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibTimeZone/GenerateTimeZoneData.cpp b/Meta/Lagom/Tools/CodeGenerators/LibTimeZone/GenerateTimeZoneData.cpp
index 0493c5e01e..aa331c37dc 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibTimeZone/GenerateTimeZoneData.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibTimeZone/GenerateTimeZoneData.cpp
@@ -18,9 +18,6 @@
 
 namespace {
 
-using StringIndexType = u16;
-constexpr auto s_string_index_type = "u16"sv;
-
 struct DateTime {
     u16 year { 0 };
     Optional<u8> month;
@@ -43,8 +40,8 @@ struct TimeZoneOffset {
     Optional<i32> dst_rule_index;
     i64 dst_offset { 0 };
 
-    StringIndexType standard_format { 0 };
-    StringIndexType daylight_format { 0 };
+    size_t standard_format { 0 };
+    size_t daylight_format { 0 };
 };
 
 struct DaylightSavingsOffset {
@@ -53,11 +50,11 @@ struct DaylightSavingsOffset {
     Optional<u16> year_to;
     DateTime in_effect;
 
-    StringIndexType format { 0 };
+    size_t format { 0 };
 };
 
 struct TimeZoneData {
-    UniqueStringStorage<StringIndexType> unique_strings;
+    UniqueStringStorage unique_strings;
 
     HashMap<String, Vector<TimeZoneOffset>> time_zones;
     Vector<String> time_zone_names;
@@ -68,7 +65,7 @@ struct TimeZoneData {
 
     HashMap<String, TimeZone::Location> time_zone_coordinates;
 
-    HashMap<String, Vector<StringIndexType>> time_zone_regions;
+    HashMap<String, Vector<size_t>> time_zone_regions;
     Vector<String> time_zone_region_names;
 };
 
@@ -479,7 +476,7 @@ static ErrorOr<void> generate_time_zone_data_implementation(Core::Stream::Buffer
 {
     StringBuilder builder;
     SourceGenerator generator { builder };
-    generator.set("string_index_type"sv, s_string_index_type);
+    generator.set("string_index_type"sv, time_zone_data.unique_strings.type_that_fits());
 
     set_dst_rule_indices(time_zone_data);
 
@@ -578,7 +575,7 @@ static constexpr Array<@type@, @size@> @name@ { {
             append_offsets(name, "DaylightSavingsOffset"sv, dst_offsets);
         });
 
-    generate_mapping(generator, time_zone_data.time_zone_region_names, s_string_index_type, "s_regional_time_zones"sv, "s_regional_time_zones_{}"sv, format_identifier,
+    generate_mapping(generator, time_zone_data.time_zone_region_names, time_zone_data.unique_strings.type_that_fits(), "s_regional_time_zones"sv, "s_regional_time_zones_{}"sv, format_identifier,
         [&](auto const& name, auto const& value) {
             auto const& time_zones = time_zone_data.time_zone_regions.find(value)->value;
 
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateEmojiData.cpp b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateEmojiData.cpp
index 0722473ecd..485deac41b 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateEmojiData.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateEmojiData.cpp
@@ -15,11 +15,8 @@
 #include <LibCore/Stream.h>
 #include <LibUnicode/Emoji.h>
 
-using StringIndexType = u16;
-constexpr auto s_string_index_type = "u16"sv;
-
 struct Emoji {
-    StringIndexType name { 0 };
+    size_t name { 0 };
     Optional<String> image_path;
     Unicode::EmojiGroup group;
     String subgroup;
@@ -31,7 +28,7 @@ struct Emoji {
 };
 
 struct EmojiData {
-    UniqueStringStorage<StringIndexType> unique_strings;
+    UniqueStringStorage unique_strings;
     Vector<Emoji> emojis;
 };
 
@@ -180,7 +177,7 @@ static ErrorOr<void> generate_emoji_data_implementation(Core::Stream::BufferedFi
     StringBuilder builder;
     SourceGenerator generator { builder };
 
-    generator.set("string_index_type"sv, s_string_index_type);
+    generator.set("string_index_type"sv, emoji_data.unique_strings.type_that_fits());
     generator.set("emojis_size"sv, String::number(emoji_data.emojis.size()));
 
     generator.append(R"~~~(
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeData.cpp b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeData.cpp
index 4c41aa29e1..d9c16d5fd9 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeData.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeData.cpp
@@ -20,9 +20,6 @@
 #include <LibCore/ArgsParser.h>
 #include <LibCore/Stream.h>
 
-using StringIndexType = u16;
-constexpr auto s_string_index_type = "u16"sv;
-
 // Some code points are excluded from UnicodeData.txt, and instead are part of a "range" of code
 // points, as indicated by the "name" field. For example:
 //     3400;<CJK Ideograph Extension A, First>;Lo;0;L;;;;;N;;;;;
@@ -74,7 +71,7 @@ using NormalizationProps = HashMap<String, Vector<Normalization>>;
 
 struct CodePointName {
     CodePointRange code_point_range;
-    StringIndexType name { 0 };
+    size_t name { 0 };
 };
 
 // UnicodeData source: https://www.unicode.org/Public/13.0.0/ucd/UnicodeData.txt
@@ -83,7 +80,7 @@ struct CodePointName {
 struct CodePointData {
     u32 code_point { 0 };
     String name;
-    Optional<StringIndexType> abbreviation;
+    Optional<size_t> abbreviation;
     u8 canonical_combining_class { 0 };
     String bidi_class;
     Optional<CodePointDecomposition> decomposition_mapping;
@@ -101,11 +98,11 @@ struct CodePointData {
 
 struct BlockName {
     CodePointRange code_point_range;
-    StringIndexType name { 0 };
+    size_t name { 0 };
 };
 
 struct UnicodeData {
-    UniqueStringStorage<StringIndexType> unique_strings;
+    UniqueStringStorage unique_strings;
 
     u32 code_points_with_non_zero_combining_class { 0 };
 
@@ -125,8 +122,8 @@ struct UnicodeData {
 
     Vector<CodePointData> code_point_data;
 
-    HashMap<u32, StringIndexType> code_point_abbreviations;
-    HashMap<u32, StringIndexType> code_point_display_name_aliases;
+    HashMap<u32, size_t> code_point_abbreviations;
+    HashMap<u32, size_t> code_point_display_name_aliases;
     Vector<CodePointName> code_point_display_names;
 
     PropList general_categories;
@@ -795,7 +792,7 @@ static ErrorOr<void> generate_unicode_data_implementation(Core::Stream::Buffered
     StringBuilder builder;
     SourceGenerator generator { builder };
 
-    generator.set("string_index_type"sv, s_string_index_type);
+    generator.set("string_index_type"sv, unicode_data.unique_strings.type_that_fits());
     generator.set("largest_special_casing_size", String::number(unicode_data.largest_special_casing_size));
     generator.set("special_casing_size", String::number(unicode_data.special_casing.size()));
 
@@ -947,7 +944,7 @@ static constexpr Array<@mapping_type@, @size@> s_@name@_mappings { {
             generator.set("code_point", String::formatted("{:#x}", data.code_point));
             generator.append("{ @code_point@");
 
-            if constexpr (IsSame<decltype(mapping), Optional<u32>> || IsSame<decltype(mapping), Optional<StringIndexType>>) {
+            if constexpr (IsSame<decltype(mapping), Optional<u32>> || IsSame<decltype(mapping), Optional<size_t>>) {
                 generator.set("mapping", String::formatted("{:#x}", *mapping));
                 generator.append(", @mapping@ },");
             } else if constexpr (IsSame<decltype(mapping), Optional<CodePointDecomposition>>) {
diff --git a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GeneratorUtil.h b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GeneratorUtil.h
index b033a24d41..27347129ea 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GeneratorUtil.h
+++ b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GeneratorUtil.h
@@ -51,10 +51,10 @@ struct AK::Traits<Vector<T>> : public GenericTraits<Vector<T>> {
     }
 };
 
-template<typename StorageType, typename IndexType>
+template<typename StorageType>
 class UniqueStorage {
 public:
-    IndexType ensure(StorageType value)
+    size_t ensure(StorageType value)
     {
         // We maintain a set of unique values in two structures: a vector which stores the values in
         // the order they are added, and a hash map which maps that value to its index in the vector.
@@ -68,17 +68,14 @@ public:
             return *index;
 
         m_storage.append(move(value));
-        size_t index = m_storage.size();
 
-        VERIFY(index < NumericLimits<IndexType>::max());
-
-        auto storage_index = static_cast<IndexType>(index);
+        auto storage_index = m_storage.size();
         m_storage_indices.set(m_storage.last(), storage_index);
 
         return storage_index;
     }
 
-    StorageType const& get(IndexType index) const
+    StorageType const& get(size_t index) const
     {
         if (index == 0) {
             static StorageType empty {};
@@ -89,6 +86,17 @@ public:
         return m_storage.at(index - 1);
     }
 
+    StringView type_that_fits() const
+    {
+        if (m_storage.size() <= NumericLimits<u8>::max())
+            return "u8"sv;
+        if (m_storage.size() <= NumericLimits<u16>::max())
+            return "u16"sv;
+        if (m_storage.size() <= NumericLimits<u32>::max())
+            return "u32"sv;
+        return "u64"sv;
+    }
+
     void generate(SourceGenerator& generator, StringView type, StringView name, size_t max_values_per_row) requires(!StorageTypeIsList<StorageType>)
     {
         generator.set("type"sv, type);
@@ -177,13 +185,12 @@ static constexpr Array<Span<@type@ const>, @size@ + 1> @name@ { {
     // clang-format gets confused by the requires() clauses above, and formats this section very weirdly.
 protected:
     Vector<StorageType> m_storage;
-    HashMap<StorageType, IndexType> m_storage_indices;
+    HashMap<StorageType, size_t> m_storage_indices;
     // clang-format on
 };
 
-template<typename StringIndexType>
-class UniqueStringStorage : public UniqueStorage<String, StringIndexType> {
-    using Base = UniqueStorage<String, StringIndexType>;
+class UniqueStringStorage : public UniqueStorage<String> {
+    using Base = UniqueStorage<String>;
 
 public:
     // The goal of the string table generator is to ensure the table is located within the read-only
@@ -275,9 +282,8 @@ struct Alias {
     String alias;
 };
 
-template<typename StringIndexType>
 struct CanonicalLanguageID {
-    static ErrorOr<CanonicalLanguageID> parse(UniqueStringStorage<StringIndexType>& unique_strings, StringView language)
+    static ErrorOr<CanonicalLanguageID> parse(UniqueStringStorage& unique_strings, StringView language)
     {
         CanonicalLanguageID language_id {};
 
@@ -314,10 +320,10 @@ struct CanonicalLanguageID {
         return language_id;
     }
 
-    StringIndexType language { 0 };
-    StringIndexType script { 0 };
-    StringIndexType region { 0 };
-    Vector<StringIndexType> variants {};
+    size_t language { 0 };
+    size_t script { 0 };
+    size_t region { 0 };
+    Vector<size_t> variants {};
 };
 
 inline ErrorOr<NonnullOwnPtr<Core::Stream::BufferedFile>> open_file(StringView path, Core::Stream::OpenMode mode)