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https://github.com/SerenityOS/serenity
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LibJS: Implement Intl.Locale.prototype.maximize
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@ -281,6 +281,7 @@ namespace JS {
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P(log10) \
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P(map) \
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P(max) \
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P(maximize) \
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P(mergeFields) \
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P(message) \
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P(microsecond) \
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@ -41,6 +41,7 @@ void LocalePrototype::initialize(GlobalObject& global_object)
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auto& vm = this->vm();
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.maximize, maximize, 0, attr);
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define_native_function(vm.names.toString, to_string, 0, attr);
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// 14.3.2 Intl.Locale.prototype[ @@toStringTag ], https://tc39.es/ecma402/#sec-Intl.Locale.prototype-@@tostringtag
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@ -58,6 +59,26 @@ void LocalePrototype::initialize(GlobalObject& global_object)
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define_native_accessor(vm.names.region, region, {}, Attribute::Configurable);
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}
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// 14.3.3 Intl.Locale.prototype.maximize ( ), https://tc39.es/ecma402/#sec-Intl.Locale.prototype.maximize
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JS_DEFINE_NATIVE_FUNCTION(LocalePrototype::maximize)
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{
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// 1. Let loc be the this value.
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// 2. Perform ? RequireInternalSlot(loc, [[InitializedLocale]]).
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auto* locale_object = typed_this(global_object);
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if (!locale_object)
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return {};
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auto locale = Unicode::parse_unicode_locale_id(locale_object->locale());
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VERIFY(locale.has_value());
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// 3. Let maximal be the result of the Add Likely Subtags algorithm applied to loc.[[Locale]]. If an error is signaled, set maximal to loc.[[Locale]].
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if (auto maximal = Unicode::add_likely_subtags(locale->language_id); maximal.has_value())
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locale->language_id = maximal.release_value();
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// 4. Return ! Construct(%Locale%, maximal).
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return Locale::create(global_object, *locale);
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}
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// 14.3.5 Intl.Locale.prototype.toString ( ), https://tc39.es/ecma402/#sec-Intl.Locale.prototype.toString
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JS_DEFINE_NATIVE_FUNCTION(LocalePrototype::to_string)
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{
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@ -19,6 +19,7 @@ public:
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virtual ~LocalePrototype() override = default;
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private:
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JS_DECLARE_NATIVE_FUNCTION(maximize);
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JS_DECLARE_NATIVE_FUNCTION(to_string);
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JS_DECLARE_NATIVE_GETTER(base_name);
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@ -0,0 +1,32 @@
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test("length is 0", () => {
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expect(Intl.Locale.prototype.maximize).toHaveLength(0);
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});
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test("normal behavior", () => {
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expect(new Intl.Locale("en").maximize().toString()).toBe("en-Latn-US");
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expect(new Intl.Locale("en-Latn").maximize().toString()).toBe("en-Latn-US");
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expect(new Intl.Locale("en-Shaw").maximize().toString()).toBe("en-Shaw-GB");
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expect(new Intl.Locale("en-Arab").maximize().toString()).toBe("en-Arab-US");
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expect(new Intl.Locale("en-US").maximize().toString()).toBe("en-Latn-US");
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expect(new Intl.Locale("en-GB").maximize().toString()).toBe("en-Latn-GB");
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expect(new Intl.Locale("en-FR").maximize().toString()).toBe("en-Latn-FR");
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expect(new Intl.Locale("it-Kana-CA").maximize().toString()).toBe("it-Kana-CA");
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expect(new Intl.Locale("und").maximize().toString()).toBe("en-Latn-US");
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expect(new Intl.Locale("und-Thai").maximize().toString()).toBe("th-Thai-TH");
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expect(new Intl.Locale("und-419").maximize().toString()).toBe("es-Latn-419");
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expect(new Intl.Locale("und-150").maximize().toString()).toBe("ru-Cyrl-RU");
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expect(new Intl.Locale("und-AT").maximize().toString()).toBe("de-Latn-AT");
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expect(new Intl.Locale("und-Cyrl-RO").maximize().toString()).toBe("bg-Cyrl-RO");
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expect(new Intl.Locale("und-AQ").maximize().toString()).toBe("und-Latn-AQ");
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});
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test("keywords are preserved", () => {
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expect(new Intl.Locale("en-u-ca-abc").maximize().toString()).toBe("en-Latn-US-u-ca-abc");
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expect(new Intl.Locale("en", { calendar: "abc" }).maximize().toString()).toBe(
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"en-Latn-US-u-ca-abc"
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);
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});
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