[intl] Implement Intl.PluralRules

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index e1850c8adb7cc3164bc81ff4e7098544a7c2fea4..75e771f4a5d2f560ec702f18cbcdfdeb9ce8757f 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -3629,6 +3629,24 @@ void Bootstrapper::ExportFromRuntime(Isolate* isolate,
       Accessors::FunctionSetPrototype(callsite_fun, proto).Assert();
     }
   }
+
+  {  // I n t l  P l u r a l R u l e s
+    Handle<JSObject> plural_rules_prototype =
+        factory->NewJSObject(isolate->object_function(), TENURED);
+    // Install the @@toStringTag property on the {prototype}.
+    JSObject::AddProperty(
+        plural_rules_prototype, factory->to_string_tag_symbol(),
+        factory->Object_string(),
+        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
+    Handle<JSFunction> plural_rules_constructor = InstallFunction(
+        container, "PluralRules", JS_OBJECT_TYPE, PluralRules::kSize,
+        plural_rules_prototype, Builtins::kIllegal);
+    JSObject::AddProperty(plural_rules_prototype, factory->constructor_string(),
+                          plural_rules_constructor, DONT_ENUM);
+    InstallWithIntrinsicDefaultProto(isolate, plural_rules_constructor,
+                                     Context::INTL_PLURAL_RULES_FUNCTION_INDEX);
+  }
+
   isolate->native_context()->set_exports_container(*container);
 }
 
@@ -3873,6 +3891,22 @@ void Genesis::InitializeGlobal_icu_case_mapping() {
   SetFunction(string_prototype, to_locale_upper_case,
               factory()->InternalizeUtf8String("toLocaleUpperCase"));
 }
+
+void Genesis::InitializeGlobal_harmony_plural_rules() {
+  if (!FLAG_harmony_plural_rules) return;
+
+  Handle<JSReceiver> exports_container(
+      JSReceiver::cast(native_context()->exports_container()));
+  Handle<JSFunction> plural_rules(
+      native_context()->intl_plural_rules_function());
+  Handle<JSObject> intl = Handle<JSObject>::cast(
+      JSReceiver::GetProperty(
+          Handle<JSReceiver>(native_context()->global_object()),
+          factory()->InternalizeUtf8String("Intl"))
+          .ToHandleChecked());
+  JSObject::AddProperty(intl, factory()->InternalizeUtf8String("PluralRules"),
+                        plural_rules, DONT_ENUM);
+}
 #endif
 
 Handle<JSFunction> Genesis::InstallArrayBuffer(Handle<JSObject> target,
@@ -4339,6 +4373,7 @@ bool Genesis::InstallExperimentalNatives() {
 #ifdef V8_I18N_SUPPORT
   static const char* icu_case_mapping_natives[] = {nullptr};
   static const char* datetime_format_to_parts_natives[] = {nullptr};
+  static const char* harmony_plural_rules_natives[] = {nullptr};
 #endif
   static const char* harmony_restrictive_generators_natives[] = {nullptr};
   static const char* harmony_trailing_commas_natives[] = {nullptr};