LibUnicode: Dynamically load the generated UnicodeLocale symbols

4 files changed, 119 insertions, 147 deletions

diff --git a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeLocale.cpp b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeLocale.cpp
index a73d694512..c33d26f65d 100644
--- a/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeLocale.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeLocale.cpp
@@ -727,11 +727,7 @@ static void generate_unicode_locale_header(Core::File& file, UnicodeLocaleData&
     generator.append(R"~~~(
 #pragma once
 
-#include <AK/Optional.h>
-#include <AK/StringView.h>
 #include <AK/Types.h>
-#include <AK/Vector.h>
-#include <LibUnicode/Forward.h>
 
 namespace Unicode {
 )~~~");
@@ -748,45 +744,6 @@ namespace Unicode {
     generate_enum(generator, format_identifier, "ListPatternStyle"sv, {}, locale_data.list_pattern_styles);
 
     generator.append(R"~~~(
-namespace Detail {
-
-Optional<Locale> locale_from_string(StringView locale);
-
-Optional<StringView> get_locale_language_mapping(StringView locale, StringView language);
-Optional<Language> language_from_string(StringView language);
-Optional<StringView> resolve_language_alias(StringView language);
-
-Optional<StringView> get_locale_territory_mapping(StringView locale, StringView territory);
-Optional<Territory> territory_from_string(StringView territory);
-Optional<StringView> resolve_territory_alias(StringView territory);
-
-Optional<StringView> get_locale_script_tag_mapping(StringView locale, StringView script_tag);
-Optional<ScriptTag> script_tag_from_string(StringView script_tag);
-Optional<StringView> resolve_script_tag_alias(StringView script_tag);
-
-Optional<StringView> get_locale_long_currency_mapping(StringView locale, StringView currency);
-Optional<StringView> get_locale_short_currency_mapping(StringView locale, StringView currency);
-Optional<StringView> get_locale_narrow_currency_mapping(StringView locale, StringView currency);
-Optional<StringView> get_locale_numeric_currency_mapping(StringView locale, StringView currency);
-Optional<Currency> currency_from_string(StringView currency);
-
-Optional<StringView> get_locale_key_mapping(StringView locale, StringView key);
-Optional<Key> key_from_string(StringView key);
-
-Optional<ListPatterns> get_locale_list_pattern_mapping(StringView locale, StringView list_pattern_type, StringView list_pattern_style);
-Optional<ListPatternType> list_pattern_type_from_string(StringView list_pattern_type);
-Optional<ListPatternStyle> list_pattern_style_from_string(StringView list_pattern_style);
-
-Optional<StringView> resolve_variant_alias(StringView variant);
-Optional<StringView> resolve_subdivision_alias(StringView subdivision);
-
-void resolve_complex_language_aliases(Unicode::LanguageID& language_id);
-
-Optional<Unicode::LanguageID> add_likely_subtags(Unicode::LanguageID const& language_id);
-Optional<String> resolve_most_likely_territory(Unicode::LanguageID const& language_id);
-
-}
-
 }
 )~~~");
 
@@ -805,7 +762,10 @@ static void generate_unicode_locale_implementation(Core::File& file, UnicodeLoca
     generator.append(R"~~~(
 #include <AK/Array.h>
 #include <AK/BinarySearch.h>
+#include <AK/Optional.h>
 #include <AK/Span.h>
+#include <AK/StringView.h>
+#include <AK/Vector.h>
 #include <LibUnicode/Locale.h>
 #include <LibUnicode/UnicodeLocale.h>
 
@@ -1072,6 +1032,7 @@ static LanguageMapping const* resolve_likely_subtag(Unicode::LanguageID const& l
         generator.set("unique_list", unique_list);
 
         generator.append(R"~~~(
+Optional<StringView> get_locale_@enum_snake@_mapping(StringView locale, StringView @enum_snake@) asm("unicode_get_locale_@enum_snake@_mapping");
 Optional<StringView> get_locale_@enum_snake@_mapping(StringView locale, StringView @enum_snake@)
 {
     auto locale_value = locale_from_string(locale);
@@ -1107,7 +1068,7 @@ Optional<StringView> get_locale_@enum_snake@_mapping(StringView locale, StringVi
         for (auto const& alias : aliases)
             hashes.set(alias.alias.hash(), format_identifier(enum_title, alias.alias));
 
-        generate_value_from_string(generator, "{}_from_string"sv, enum_title, enum_snake, move(hashes));
+        generate_value_from_string_for_dynamic_loading(generator, "{}_from_string"sv, enum_title, enum_snake, move(hashes));
     };
 
     auto append_alias_search = [&](StringView enum_snake, auto const& aliases) {
@@ -1117,31 +1078,31 @@ Optional<StringView> get_locale_@enum_snake@_mapping(StringView locale, StringVi
         for (auto const& alias : aliases)
             hashes.set(alias.key.hash(), alias.value);
 
-        generate_value_from_string(generator, "resolve_{}_alias"sv, s_string_index_type, enum_snake, move(hashes), "StringView"sv, "s_string_list[{}]"sv);
+        generate_value_from_string_for_dynamic_loading(generator, "resolve_{}_alias"sv, s_string_index_type, enum_snake, move(hashes), "StringView"sv, "s_string_list[{}]"sv);
     };
 
     append_from_string("Locale"sv, "locale"sv, locale_data.locales.keys(), locale_data.locale_aliases);
 
-    append_mapping_search("language"sv, "language"sv, "s_languages"sv, "s_language_lists"sv);
     append_from_string("Language"sv, "language"sv, locale_data.languages);
+    append_mapping_search("language"sv, "language"sv, "s_languages"sv, "s_language_lists"sv);
     append_alias_search("language"sv, locale_data.language_aliases);
 
-    append_mapping_search("territory"sv, "territory"sv, "s_territories"sv, "s_territory_lists"sv);
     append_from_string("Territory"sv, "territory"sv, locale_data.territories);
+    append_mapping_search("territory"sv, "territory"sv, "s_territories"sv, "s_territory_lists"sv);
     append_alias_search("territory"sv, locale_data.territory_aliases);
 
-    append_mapping_search("script_tag"sv, "script_tag"sv, "s_scripts"sv, "s_script_lists"sv);
     append_from_string("ScriptTag"sv, "script_tag"sv, locale_data.scripts);
+    append_mapping_search("script_tag"sv, "script_tag"sv, "s_scripts"sv, "s_script_lists"sv);
     append_alias_search("script_tag"sv, locale_data.script_aliases);
 
+    append_from_string("Currency"sv, "currency"sv, locale_data.currencies);
     append_mapping_search("long_currency"sv, "currency"sv, "s_long_currencies"sv, "s_currency_lists"sv);
     append_mapping_search("short_currency"sv, "currency"sv, "s_short_currencies"sv, "s_currency_lists"sv);
     append_mapping_search("narrow_currency"sv, "currency"sv, "s_narrow_currencies"sv, "s_currency_lists"sv);
     append_mapping_search("numeric_currency"sv, "currency"sv, "s_numeric_currencies"sv, "s_currency_lists"sv);
-    append_from_string("Currency"sv, "currency"sv, locale_data.currencies);
 
-    append_mapping_search("key"sv, "key"sv, "s_keywords"sv, "s_keyword_lists"sv);
     append_from_string("Key"sv, "key"sv, locale_data.keywords);
+    append_mapping_search("key"sv, "key"sv, "s_keywords"sv, "s_keyword_lists"sv);
 
     append_alias_search("variant"sv, locale_data.variant_aliases);
     append_alias_search("subdivision"sv, locale_data.subdivision_aliases);
@@ -1150,6 +1111,7 @@ Optional<StringView> get_locale_@enum_snake@_mapping(StringView locale, StringVi
     append_from_string("ListPatternStyle"sv, "list_pattern_style"sv, locale_data.list_pattern_styles);
 
     generator.append(R"~~~(
+Optional<ListPatterns> get_locale_list_pattern_mapping(StringView locale, StringView list_pattern_type, StringView list_pattern_style) asm("unicode_get_locale_list_pattern_mapping");
 Optional<ListPatterns> get_locale_list_pattern_mapping(StringView locale, StringView list_pattern_type, StringView list_pattern_style)
 {
     auto locale_value = locale_from_string(locale);
@@ -1185,6 +1147,7 @@ Optional<ListPatterns> get_locale_list_pattern_mapping(StringView locale, String
     return {};
 }
 
+void resolve_complex_language_aliases(Unicode::LanguageID& language_id) asm("unicode_resolve_complex_language_aliases");
 void resolve_complex_language_aliases(Unicode::LanguageID& language_id)
 {
     for (auto const& map : s_complex_alias) {
@@ -1217,6 +1180,7 @@ void resolve_complex_language_aliases(Unicode::LanguageID& language_id)
     }
 }
 
+Optional<Unicode::LanguageID> add_likely_subtags(Unicode::LanguageID const& language_id) asm("unicode_add_likely_subtags");
 Optional<Unicode::LanguageID> add_likely_subtags(Unicode::LanguageID const& language_id)
 {
     // https://www.unicode.org/reports/tr35/#Likely_Subtags
@@ -1243,6 +1207,7 @@ Optional<Unicode::LanguageID> add_likely_subtags(Unicode::LanguageID const& lang
     return maximized;
 }
 
+Optional<String> resolve_most_likely_territory(Unicode::LanguageID const& language_id) asm("unicode_resolve_most_likely_territory");
 Optional<String> resolve_most_likely_territory(Unicode::LanguageID const& language_id)
 {
     if (auto const* likely_subtag = resolve_likely_subtag(language_id); likely_subtag != nullptr)
diff --git a/Userland/Libraries/LibUnicode/Locale.cpp b/Userland/Libraries/LibUnicode/Locale.cpp
index d0dce9e3ed..ed3e17a4c3 100644
--- a/Userland/Libraries/LibUnicode/Locale.cpp
+++ b/Userland/Libraries/LibUnicode/Locale.cpp
@@ -11,10 +11,7 @@
 #include <LibUnicode/CharacterTypes.h>
 #include <LibUnicode/DateTimeFormat.h>
 #include <LibUnicode/Locale.h>
-
-#if ENABLE_UNICODE_DATA
-#    include <LibUnicode/UnicodeLocale.h>
-#endif
+#include <LibUnicode/UnicodeSymbols.h>
 
 namespace Unicode {
 
@@ -571,7 +568,9 @@ void canonicalize_unicode_extension_values(StringView key, String& value, bool r
 
 static void transform_unicode_locale_id_to_canonical_syntax(LocaleID& locale_id)
 {
-    auto canonicalize_language = [](LanguageID& language_id, bool force_lowercase) {
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+
+    auto canonicalize_language = [&](LanguageID& language_id, bool force_lowercase) {
         language_id.language = language_id.language->to_lowercase();
         if (language_id.script.has_value())
             language_id.script = language_id.script->to_titlecase();
@@ -580,9 +579,7 @@ static void transform_unicode_locale_id_to_canonical_syntax(LocaleID& locale_id)
         for (auto& variant : language_id.variants)
             variant = variant.to_lowercase();
 
-#if ENABLE_UNICODE_DATA
-        Detail::resolve_complex_language_aliases(language_id);
-#endif
+        symbols.resolve_complex_language_aliases(language_id);
 
         if (auto alias = resolve_language_alias(*language_id.language); alias.has_value()) {
             auto language_alias = parse_unicode_language_id(*alias);
@@ -742,71 +739,55 @@ String const& default_locale()
     return locale;
 }
 
-bool is_locale_available([[maybe_unused]] StringView locale)
+bool is_locale_available(StringView locale)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::locale_from_string(locale).has_value();
-#else
-    return false;
-#endif
+    return locale_from_string(locale).has_value();
 }
 
-Optional<Locale> locale_from_string([[maybe_unused]] StringView locale)
+Optional<Locale> locale_from_string(StringView locale)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::locale_from_string(locale);
-#else
-    return {};
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.locale_from_string(locale);
 }
 
-Optional<StringView> get_locale_language_mapping([[maybe_unused]] StringView locale, [[maybe_unused]] StringView language)
+Optional<StringView> get_locale_language_mapping(StringView locale, StringView language)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::get_locale_language_mapping(locale, language);
-#else
-    return {};
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.get_locale_language_mapping(locale, language);
 }
 
-Optional<StringView> get_locale_territory_mapping([[maybe_unused]] StringView locale, [[maybe_unused]] StringView territory)
+Optional<StringView> get_locale_territory_mapping(StringView locale, StringView territory)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::get_locale_territory_mapping(locale, territory);
-#else
-    return {};
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.get_locale_territory_mapping(locale, territory);
 }
 
-Optional<StringView> get_locale_script_mapping([[maybe_unused]] StringView locale, [[maybe_unused]] StringView script)
+Optional<StringView> get_locale_script_mapping(StringView locale, StringView script)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::get_locale_script_tag_mapping(locale, script);
-#else
-    return {};
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.get_locale_script_tag_mapping(locale, script);
 }
 
-Optional<StringView> get_locale_currency_mapping([[maybe_unused]] StringView locale, [[maybe_unused]] StringView currency, [[maybe_unused]] Style style)
+Optional<StringView> get_locale_currency_mapping(StringView locale, StringView currency, Style style)
 {
-#if ENABLE_UNICODE_DATA
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+
     switch (style) {
     case Style::Long:
-        return Detail::get_locale_long_currency_mapping(locale, currency);
+        return symbols.get_locale_long_currency_mapping(locale, currency);
     case Style::Short:
-        return Detail::get_locale_short_currency_mapping(locale, currency);
+        return symbols.get_locale_short_currency_mapping(locale, currency);
     case Style::Narrow:
-        return Detail::get_locale_narrow_currency_mapping(locale, currency);
+        return symbols.get_locale_narrow_currency_mapping(locale, currency);
     case Style::Numeric:
-        return Detail::get_locale_numeric_currency_mapping(locale, currency);
+        return symbols.get_locale_numeric_currency_mapping(locale, currency);
+    default:
+        VERIFY_NOT_REACHED();
     }
-#endif
-    return {};
 }
 
-Vector<StringView> get_locale_key_mapping([[maybe_unused]] StringView locale, [[maybe_unused]] StringView keyword)
+Vector<StringView> get_locale_key_mapping(StringView locale, StringView keyword)
 {
-#if ENABLE_UNICODE_DATA
     if (keyword == "hc"sv) {
         auto hour_cycles = get_regional_hour_cycles(locale);
 
@@ -819,78 +800,58 @@ Vector<StringView> get_locale_key_mapping([[maybe_unused]] StringView locale, [[
         return values;
     }
 
-    if (auto values = Detail::get_locale_key_mapping(locale, keyword); values.has_value())
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+
+    if (auto values = symbols.get_locale_key_mapping(locale, keyword); values.has_value())
         return values->split_view(',');
-#endif
+
     return {};
 }
 
-Optional<ListPatterns> get_locale_list_patterns([[maybe_unused]] StringView locale, [[maybe_unused]] StringView type, [[maybe_unused]] StringView style)
+Optional<ListPatterns> get_locale_list_patterns(StringView locale, StringView type, StringView style)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::get_locale_list_pattern_mapping(locale, type, style);
-#else
-    return {};
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.get_locale_list_pattern_mapping(locale, type, style);
 }
 
 Optional<StringView> resolve_language_alias(StringView language)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::resolve_language_alias(language);
-#else
-    return language;
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.resolve_language_alias(language);
 }
 
 Optional<StringView> resolve_territory_alias(StringView territory)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::resolve_territory_alias(territory);
-#else
-    return territory;
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.resolve_territory_alias(territory);
 }
 
 Optional<StringView> resolve_script_tag_alias(StringView script_tag)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::resolve_script_tag_alias(script_tag);
-#else
-    return script_tag;
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.resolve_script_tag_alias(script_tag);
 }
 
 Optional<StringView> resolve_variant_alias(StringView variant)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::resolve_variant_alias(variant);
-#else
-    return variant;
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.resolve_variant_alias(variant);
 }
 
 Optional<StringView> resolve_subdivision_alias(StringView subdivision)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::resolve_subdivision_alias(subdivision);
-#else
-    return subdivision;
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.resolve_subdivision_alias(subdivision);
 }
 
-Optional<LanguageID> add_likely_subtags([[maybe_unused]] LanguageID const& language_id)
+Optional<LanguageID> add_likely_subtags(LanguageID const& language_id)
 {
-#if ENABLE_UNICODE_DATA
-    return Detail::add_likely_subtags(language_id);
-#else
-    return {};
-#endif
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
+    return symbols.add_likely_subtags(language_id);
 }
 
-Optional<LanguageID> remove_likely_subtags([[maybe_unused]] LanguageID const& language_id)
+Optional<LanguageID> remove_likely_subtags(LanguageID const& language_id)
 {
-#if ENABLE_UNICODE_DATA
     // https://www.unicode.org/reports/tr35/#Likely_Subtags
     auto return_language_and_variants = [](auto language, auto variants) {
         language.variants = move(variants);
@@ -929,22 +890,18 @@ Optional<LanguageID> remove_likely_subtags([[maybe_unused]] LanguageID const& la
 
     // 5. If you do not get a match, return max + variants.
     return return_language_and_variants(maximized.release_value(), move(variants));
-#else
-    return {};
-#endif
 }
 
-String resolve_most_likely_territory([[maybe_unused]] LanguageID const& language_id, StringView territory_alias)
+String resolve_most_likely_territory(LanguageID const& language_id, StringView territory_alias)
 {
+    static auto const& symbols = Detail::Symbols::ensure_loaded();
     auto aliases = territory_alias.split_view(' ');
 
-#if ENABLE_UNICODE_DATA
     if (aliases.size() > 1) {
-        auto territory = Detail::resolve_most_likely_territory(language_id);
+        auto territory = symbols.resolve_most_likely_territory(language_id);
         if (territory.has_value() && aliases.contains_slow(*territory))
             return territory.release_value();
     }
-#endif
 
     return aliases[0].to_string();
 }
diff --git a/Userland/Libraries/LibUnicode/UnicodeSymbols.cpp b/Userland/Libraries/LibUnicode/UnicodeSymbols.cpp
index c0b594e679..3befd13432 100644
--- a/Userland/Libraries/LibUnicode/UnicodeSymbols.cpp
+++ b/Userland/Libraries/LibUnicode/UnicodeSymbols.cpp
@@ -15,6 +15,7 @@
 #    endif
 #else
 #    include <AK/Function.h>
+#    include <LibUnicode/Locale.h>
 #endif
 
 namespace Unicode::Detail {
@@ -28,7 +29,10 @@ template<typename ReturnType, typename... ParameterTypes>
 struct FunctionStub<Function<ReturnType(ParameterTypes...)>> {
     static constexpr auto make_stub()
     {
-        return [](ParameterTypes...) -> ReturnType { return {}; };
+        if constexpr (IsVoid<ReturnType>)
+            return [](ParameterTypes...) {};
+        else
+            return [](ParameterTypes...) -> ReturnType { return {}; };
     }
 };
 
@@ -87,6 +91,25 @@ Symbols const& Symbols::ensure_loaded()
     load_symbol(symbols.code_point_has_script, "unicode_code_point_has_script");
     load_symbol(symbols.code_point_has_script_extension, "unicode_code_point_has_script_extension");
 
+    load_symbol(symbols.locale_from_string, "unicode_locale_from_string");
+    load_symbol(symbols.get_locale_language_mapping, "unicode_get_locale_language_mapping");
+    load_symbol(symbols.get_locale_territory_mapping, "unicode_get_locale_territory_mapping");
+    load_symbol(symbols.get_locale_script_tag_mapping, "unicode_get_locale_script_tag_mapping");
+    load_symbol(symbols.get_locale_long_currency_mapping, "unicode_get_locale_long_currency_mapping");
+    load_symbol(symbols.get_locale_short_currency_mapping, "unicode_get_locale_short_currency_mapping");
+    load_symbol(symbols.get_locale_narrow_currency_mapping, "unicode_get_locale_narrow_currency_mapping");
+    load_symbol(symbols.get_locale_numeric_currency_mapping, "unicode_get_locale_numeric_currency_mapping");
+    load_symbol(symbols.get_locale_key_mapping, "unicode_get_locale_key_mapping");
+    load_symbol(symbols.get_locale_list_pattern_mapping, "unicode_get_locale_list_pattern_mapping");
+    load_symbol(symbols.resolve_language_alias, "unicode_resolve_language_alias");
+    load_symbol(symbols.resolve_territory_alias, "unicode_resolve_territory_alias");
+    load_symbol(symbols.resolve_script_tag_alias, "unicode_resolve_script_tag_alias");
+    load_symbol(symbols.resolve_variant_alias, "unicode_resolve_variant_alias");
+    load_symbol(symbols.resolve_subdivision_alias, "unicode_resolve_subdivision_alias");
+    load_symbol(symbols.resolve_complex_language_aliases, "unicode_resolve_complex_language_aliases");
+    load_symbol(symbols.add_likely_subtags, "unicode_add_likely_subtags");
+    load_symbol(symbols.resolve_most_likely_territory, "unicode_resolve_most_likely_territory");
+
     initialized = true;
     return symbols;
 }
diff --git a/Userland/Libraries/LibUnicode/UnicodeSymbols.h b/Userland/Libraries/LibUnicode/UnicodeSymbols.h
index e4babe8218..4e1e2d2b70 100644
--- a/Userland/Libraries/LibUnicode/UnicodeSymbols.h
+++ b/Userland/Libraries/LibUnicode/UnicodeSymbols.h
@@ -10,6 +10,7 @@
 #include <AK/String.h>
 #include <AK/StringView.h>
 #include <AK/Types.h>
+#include <AK/Vector.h>
 #include <LibUnicode/Forward.h>
 
 namespace Unicode::Detail {
@@ -37,6 +38,32 @@ struct Symbols {
     bool (*code_point_has_script)(u32, Script) { nullptr };
     bool (*code_point_has_script_extension)(u32, Script) { nullptr };
 
+    // Loaded from UnicodeLocale.cpp:
+
+    Optional<Locale> (*locale_from_string)(StringView) { nullptr };
+
+    Optional<StringView> (*get_locale_language_mapping)(StringView, StringView) { nullptr };
+    Optional<StringView> (*get_locale_territory_mapping)(StringView, StringView) { nullptr };
+    Optional<StringView> (*get_locale_script_tag_mapping)(StringView, StringView) { nullptr };
+    Optional<StringView> (*get_locale_long_currency_mapping)(StringView, StringView) { nullptr };
+    Optional<StringView> (*get_locale_short_currency_mapping)(StringView, StringView) { nullptr };
+    Optional<StringView> (*get_locale_narrow_currency_mapping)(StringView, StringView) { nullptr };
+    Optional<StringView> (*get_locale_numeric_currency_mapping)(StringView, StringView) { nullptr };
+    Optional<StringView> (*get_locale_key_mapping)(StringView, StringView) { nullptr };
+
+    Optional<ListPatterns> (*get_locale_list_pattern_mapping)(StringView, StringView, StringView) { nullptr };
+
+    Optional<StringView> (*resolve_language_alias)(StringView) { nullptr };
+    Optional<StringView> (*resolve_territory_alias)(StringView) { nullptr };
+    Optional<StringView> (*resolve_script_tag_alias)(StringView) { nullptr };
+    Optional<StringView> (*resolve_variant_alias)(StringView) { nullptr };
+    Optional<StringView> (*resolve_subdivision_alias)(StringView) { nullptr };
+
+    void (*resolve_complex_language_aliases)(LanguageID&);
+
+    Optional<LanguageID> (*add_likely_subtags)(LanguageID const&);
+    Optional<String> (*resolve_most_likely_territory)(LanguageID const&);
+
 private:
     Symbols() = default;
 };