[class] Remove flags for class fields

Bug: v8:5367, v8:5368
Change-Id: I86f25f9f658e21a05604f3014e6ebf74f1a8a1f7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1590164Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61139}

src/bootstrapper.cc

@@ -4185,11 +4185,7 @@ void Genesis::InitializeCallSiteBuiltins() {
   void Genesis::InitializeGlobal_##id() {}
 
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_namespace_exports)
-EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_public_fields)
-EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_private_fields)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_private_methods)
-EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_static_fields)
-EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_class_fields)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_dynamic_import)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_import_meta)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_numeric_separator)

src/flag-definitions.h

@@ -204,17 +204,10 @@ DEFINE_IMPLICATION(es_staging, harmony)
 // Enabling import.meta requires to also enable import()
 DEFINE_IMPLICATION(harmony_import_meta, harmony_dynamic_import)
 
-DEFINE_IMPLICATION(harmony_class_fields, harmony_public_fields)
-DEFINE_IMPLICATION(harmony_class_fields, harmony_static_fields)
-DEFINE_IMPLICATION(harmony_class_fields, harmony_private_fields)
-
-DEFINE_IMPLICATION(harmony_private_methods, harmony_private_fields)
-
 // Update bootstrapper.cc whenever adding a new feature flag.
 
 // Features that are still work in progress (behind individual flags).
 #define HARMONY_INPROGRESS_BASE(V)                                        \
-  V(harmony_class_fields, "harmony fields in class literals")             \
   V(harmony_private_methods, "harmony private methods in class literals") \
   V(harmony_regexp_sequence, "RegExp Unicode sequence properties")        \
   V(harmony_weak_refs, "harmony weak references")
@@ -248,11 +241,8 @@ DEFINE_IMPLICATION(harmony_private_methods, harmony_private_fields)
   V(harmony_import_meta, "harmony import.meta property")                       \
   V(harmony_dynamic_import, "harmony dynamic import")                          \
   V(harmony_global, "harmony global")                                          \
-  V(harmony_public_fields, "harmony public instance fields in class literals") \
-  V(harmony_static_fields, "harmony static fields in class literals")          \
   V(harmony_object_from_entries, "harmony Object.fromEntries()")               \
   V(harmony_await_optimization, "harmony await taking 1 tick")                 \
-  V(harmony_private_fields, "harmony private fields in class literals")        \
   V(harmony_hashbang, "harmony hashbang syntax")                               \
   V(harmony_numeric_separator, "harmony numeric separator between digits")     \
   V(harmony_promise_all_settled, "harmony Promise.allSettled")

src/parsing/parse-info.cc

@@ -60,12 +60,9 @@ ParseInfo::ParseInfo(Isolate* isolate, AccountingAllocator* zone_allocator)
   set_might_always_opt(FLAG_always_opt || FLAG_prepare_always_opt);
   set_allow_lazy_compile(FLAG_lazy);
   set_allow_natives_syntax(FLAG_allow_natives_syntax);
-  set_allow_harmony_public_fields(FLAG_harmony_public_fields);
-  set_allow_harmony_static_fields(FLAG_harmony_static_fields);
   set_allow_harmony_dynamic_import(FLAG_harmony_dynamic_import);
   set_allow_harmony_import_meta(FLAG_harmony_import_meta);
   set_allow_harmony_numeric_separator(FLAG_harmony_numeric_separator);
-  set_allow_harmony_private_fields(FLAG_harmony_private_fields);
   set_allow_harmony_private_methods(FLAG_harmony_private_methods);
 }
 

src/parsing/parse-info.h

@@ -101,18 +101,12 @@ class V8_EXPORT_PRIVATE ParseInfo {
   FLAG_ACCESSOR(kAllowLazyCompile, allow_lazy_compile, set_allow_lazy_compile)
   FLAG_ACCESSOR(kAllowNativeSyntax, allow_native_syntax,
                 set_allow_native_syntax)
-  FLAG_ACCESSOR(kAllowHarmonyPublicFields, allow_harmony_public_fields,
-                set_allow_harmony_public_fields)
-  FLAG_ACCESSOR(kAllowHarmonyStaticFields, allow_harmony_static_fields,
-                set_allow_harmony_static_fields)
   FLAG_ACCESSOR(kAllowHarmonyDynamicImport, allow_harmony_dynamic_import,
                 set_allow_harmony_dynamic_import)
   FLAG_ACCESSOR(kAllowHarmonyImportMeta, allow_harmony_import_meta,
                 set_allow_harmony_import_meta)
   FLAG_ACCESSOR(kAllowHarmonyNumericSeparator, allow_harmony_numeric_separator,
                 set_allow_harmony_numeric_separator)
-  FLAG_ACCESSOR(kAllowHarmonyPrivateFields, allow_harmony_private_fields,
-                set_allow_harmony_private_fields)
   FLAG_ACCESSOR(kAllowHarmonyPrivateMethods, allow_harmony_private_methods,
                 set_allow_harmony_private_methods)
   FLAG_ACCESSOR(kIsOneshotIIFE, is_oneshot_iife, set_is_oneshot_iife)

src/parsing/parser-base.h

@@ -263,11 +263,8 @@ class ParserBase {
         script_id_(script_id),
         default_eager_compile_hint_(FunctionLiteral::kShouldLazyCompile),
         allow_natives_(false),
-        allow_harmony_public_fields_(false),
-        allow_harmony_static_fields_(false),
         allow_harmony_dynamic_import_(false),
         allow_harmony_import_meta_(false),
-        allow_harmony_private_fields_(false),
         allow_harmony_private_methods_(false),
         allow_eval_cache_(true) {
     pointer_buffer_.reserve(32);
@@ -279,8 +276,6 @@ class ParserBase {
   void set_allow_##name(bool allow) { allow_##name##_ = allow; }
 
   ALLOW_ACCESSORS(natives)
-  ALLOW_ACCESSORS(harmony_public_fields)
-  ALLOW_ACCESSORS(harmony_static_fields)
   ALLOW_ACCESSORS(harmony_dynamic_import)
   ALLOW_ACCESSORS(harmony_import_meta)
   ALLOW_ACCESSORS(harmony_private_methods)
@@ -296,13 +291,6 @@ class ParserBase {
     scanner()->set_allow_harmony_numeric_separator(allow);
   }
 
-  bool allow_harmony_private_fields() const {
-    return scanner()->allow_harmony_private_fields();
-  }
-  void set_allow_harmony_private_fields(bool allow) {
-    scanner()->set_allow_harmony_private_fields(allow);
-  }
-
   uintptr_t stack_limit() const { return stack_limit_; }
 
   void set_stack_limit(uintptr_t stack_limit) { stack_limit_ = stack_limit; }
@@ -1442,11 +1430,8 @@ class ParserBase {
   bool accept_IN_ = true;
 
   bool allow_natives_;
-  bool allow_harmony_public_fields_;
-  bool allow_harmony_static_fields_;
   bool allow_harmony_dynamic_import_;
   bool allow_harmony_import_meta_;
-  bool allow_harmony_private_fields_;
   bool allow_harmony_private_methods_;
   bool allow_eval_cache_;
 };
@@ -1566,7 +1551,7 @@ ParserBase<Impl>::ParsePropertyOrPrivatePropertyName() {
   if (V8_LIKELY(Token::IsPropertyName(next))) {
     name = impl()->GetSymbol();
     key = factory()->NewStringLiteral(name, pos);
-  } else if (allow_harmony_private_fields() && next == Token::PRIVATE_NAME) {
+  } else if (next == Token::PRIVATE_NAME) {
     // In the case of a top level function, we completely skip
     // analysing it's scope, meaning, we don't have a chance to
     // resolve private names and find that they are not enclosed in a
@@ -2128,9 +2113,6 @@ ParserBase<Impl>::ParseClassPropertyDefinition(ClassInfo* class_info,
   DCHECK_EQ(prop_info->position, PropertyPosition::kClassLiteral);
 
   Token::Value name_token = peek();
-  DCHECK_IMPLIES(name_token == Token::PRIVATE_NAME,
-                 allow_harmony_private_fields());
-
   int property_beg_pos = scanner()->peek_location().beg_pos;
   int name_token_position = property_beg_pos;
   ExpressionT name_expression;
@@ -2166,44 +2148,34 @@ ParserBase<Impl>::ParseClassPropertyDefinition(ClassInfo* class_info,
     case ParsePropertyKind::kAssign:
     case ParsePropertyKind::kClassField:
     case ParsePropertyKind::kShorthandOrClassField:
-    case ParsePropertyKind::kNotSet:  // This case is a name followed by a name
-                                      // or other property. Here we have to
-                                      // assume that's an uninitialized field
-                                      // followed by a linebreak followed by a
-                                      // property, with ASI adding the
-                                      // semicolon. If not, there will be a
-                                      // syntax error after parsing the first
-                                      // name as an uninitialized field.
-      if (allow_harmony_public_fields() || allow_harmony_private_fields()) {
-        prop_info->kind = ParsePropertyKind::kClassField;
-        DCHECK_IMPLIES(prop_info->is_computed_name, !prop_info->is_private);
-
-        if (prop_info->is_static && !allow_harmony_static_fields()) {
-          ReportUnexpectedToken(Next());
-          return impl()->NullLiteralProperty();
-        }
+    case ParsePropertyKind::kNotSet: {  // This case is a name followed by a
+                                        // name or other property. Here we have
+                                        // to assume that's an uninitialized
+                                        // field followed by a linebreak
+                                        // followed by a property, with ASI
+                                        // adding the semicolon. If not, there
+                                        // will be a syntax error after parsing
+                                        // the first name as an uninitialized
+                                        // field.
+      prop_info->kind = ParsePropertyKind::kClassField;
+      DCHECK_IMPLIES(prop_info->is_computed_name, !prop_info->is_private);
 
-        if (!prop_info->is_computed_name) {
-          CheckClassFieldName(prop_info->name, prop_info->is_static);
-        }
-
-        ExpressionT initializer = ParseMemberInitializer(
-            class_info, property_beg_pos, prop_info->is_static);
-        ExpectSemicolon();
-
-        ClassLiteralPropertyT result = factory()->NewClassLiteralProperty(
-            name_expression, initializer, ClassLiteralProperty::FIELD,
-            prop_info->is_static, prop_info->is_computed_name,
-            prop_info->is_private);
-        impl()->SetFunctionNameFromPropertyName(result, prop_info->name);
+      if (!prop_info->is_computed_name) {
+        CheckClassFieldName(prop_info->name, prop_info->is_static);
+      }
 
-        return result;
+      ExpressionT initializer = ParseMemberInitializer(
+          class_info, property_beg_pos, prop_info->is_static);
+      ExpectSemicolon();
 
-      } else {
-        ReportUnexpectedToken(Next());
-        return impl()->NullLiteralProperty();
-      }
+      ClassLiteralPropertyT result = factory()->NewClassLiteralProperty(
+          name_expression, initializer, ClassLiteralProperty::FIELD,
+          prop_info->is_static, prop_info->is_computed_name,
+          prop_info->is_private);
+      impl()->SetFunctionNameFromPropertyName(result, prop_info->name);
 
+      return result;
+    }
     case ParsePropertyKind::kMethod: {
       // MethodDefinition
       //    PropertyName '(' StrictFormalParameters ')' '{' FunctionBody '}'

src/parsing/parser.cc

@@ -422,12 +422,9 @@ Parser::Parser(ParseInfo* info)
   allow_lazy_ = info->allow_lazy_compile() && info->allow_lazy_parsing() &&
                 info->extension() == nullptr && can_compile_lazily;
   set_allow_natives(info->allow_natives_syntax());
-  set_allow_harmony_public_fields(info->allow_harmony_public_fields());
-  set_allow_harmony_static_fields(info->allow_harmony_static_fields());
   set_allow_harmony_dynamic_import(info->allow_harmony_dynamic_import());
   set_allow_harmony_import_meta(info->allow_harmony_import_meta());
   set_allow_harmony_numeric_separator(info->allow_harmony_numeric_separator());
-  set_allow_harmony_private_fields(info->allow_harmony_private_fields());
   set_allow_harmony_private_methods(info->allow_harmony_private_methods());
   for (int feature = 0; feature < v8::Isolate::kUseCounterFeatureCount;
        ++feature) {
@@ -2808,8 +2805,6 @@ void Parser::DeclareClassField(ClassScope* scope,
                                const AstRawString* property_name,
                                bool is_static, bool is_computed_name,
                                bool is_private, ClassInfo* class_info) {
-  DCHECK(allow_harmony_public_fields() || allow_harmony_private_fields());
-
   if (is_static) {
     class_info->static_fields->Add(property, zone());
   } else {

src/parsing/parser.h

@@ -233,11 +233,8 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
           parsing_module_, parsing_on_main_thread_);
 #define SET_ALLOW(name) reusable_preparser_->set_allow_##name(allow_##name());
       SET_ALLOW(natives);
-      SET_ALLOW(harmony_public_fields);
-      SET_ALLOW(harmony_static_fields);
       SET_ALLOW(harmony_dynamic_import);
       SET_ALLOW(harmony_import_meta);
-      SET_ALLOW(harmony_private_fields);
       SET_ALLOW(harmony_private_methods);
       SET_ALLOW(eval_cache);
 #undef SET_ALLOW

src/parsing/scanner.cc

@@ -556,12 +556,6 @@ Token::Value Scanner::ScanString() {
 }
 
 Token::Value Scanner::ScanPrivateName() {
-  if (!allow_harmony_private_fields()) {
-    ReportScannerError(source_pos(),
-                       MessageTemplate::kInvalidOrUnexpectedToken);
-    return Token::ILLEGAL;
-  }
-
   next().literal_chars.Start();
   DCHECK_EQ(c0_, '#');
   DCHECK(!IsIdentifierStart(kEndOfInput));

src/parsing/scanner.h

@@ -405,12 +405,6 @@ class V8_EXPORT_PRIVATE Scanner {
 
   bool FoundHtmlComment() const { return found_html_comment_; }
 
-  bool allow_harmony_private_fields() const {
-    return allow_harmony_private_fields_;
-  }
-  void set_allow_harmony_private_fields(bool allow) {
-    allow_harmony_private_fields_ = allow;
-  }
   bool allow_harmony_numeric_separator() const {
     return allow_harmony_numeric_separator_;
   }
@@ -812,7 +806,6 @@ class V8_EXPORT_PRIVATE Scanner {
   bool found_html_comment_;
 
   // Harmony flags to allow ESNext features.
-  bool allow_harmony_private_fields_;
   bool allow_harmony_numeric_separator_;
 
   const bool is_module_;

test/cctest/interpreter/bytecode_expectations/PrivateClassFields.golden

@@ -4,7 +4,6 @@
 
 ---
 wrap: yes
-private fields: yes
 
 ---
 snippet: "

test/cctest/interpreter/bytecode_expectations/PublicClassFields.golden

@@ -4,7 +4,6 @@
 
 ---
 wrap: yes
-public fields: yes
 
 ---
 snippet: "

test/cctest/interpreter/bytecode_expectations/StaticClassFields.golden

@@ -4,8 +4,6 @@
 
 ---
 wrap: yes
-public fields: yes
-static fields: yes
 
 ---
 snippet: "

test/cctest/interpreter/generate-bytecode-expectations.cc

@@ -43,10 +43,7 @@ class ProgramOptions final {
         print_callee_(false),
         oneshot_opt_(false),
         async_iteration_(false),
-        public_fields_(false),
-        private_fields_(false),
         private_methods_(false),
-        static_fields_(false),
         verbose_(false) {}
 
   bool Validate() const;
@@ -67,10 +64,7 @@ class ProgramOptions final {
   bool print_callee() const { return print_callee_; }
   bool oneshot_opt() const { return oneshot_opt_; }
   bool async_iteration() const { return async_iteration_; }
-  bool public_fields() const { return public_fields_; }
-  bool private_fields() const { return private_fields_; }
   bool private_methods() const { return private_methods_; }
-  bool static_fields() const { return static_fields_; }
   bool verbose() const { return verbose_; }
   bool suppress_runtime_errors() const { return rebaseline_ && !verbose_; }
   std::vector<std::string> input_filenames() const { return input_filenames_; }
@@ -89,10 +83,7 @@ class ProgramOptions final {
   bool print_callee_;
   bool oneshot_opt_;
   bool async_iteration_;
-  bool public_fields_;
-  bool private_fields_;
   bool private_methods_;
-  bool static_fields_;
   bool verbose_;
   std::vector<std::string> input_filenames_;
   std::string output_filename_;
@@ -195,14 +186,8 @@ ProgramOptions ProgramOptions::FromCommandLine(int argc, char** argv) {
       options.oneshot_opt_ = false;
     } else if (strcmp(argv[i], "--async-iteration") == 0) {
       options.async_iteration_ = true;
-    } else if (strcmp(argv[i], "--public-fields") == 0) {
-      options.public_fields_ = true;
-    } else if (strcmp(argv[i], "--private-fields") == 0) {
-      options.private_fields_ = true;
     } else if (strcmp(argv[i], "--private-methods") == 0) {
       options.private_methods_ = true;
-    } else if (strcmp(argv[i], "--static-fields") == 0) {
-      options.static_fields_ = true;
     } else if (strcmp(argv[i], "--verbose") == 0) {
       options.verbose_ = true;
     } else if (strncmp(argv[i], "--output=", 9) == 0) {
@@ -312,14 +297,8 @@ void ProgramOptions::UpdateFromHeader(std::istream& stream) {
       oneshot_opt_ = ParseBoolean(line.c_str() + strlen(kOneshotOpt));
     } else if (line.compare(0, 17, "async iteration: ") == 0) {
       async_iteration_ = ParseBoolean(line.c_str() + 17);
-    } else if (line.compare(0, 15, "public fields: ") == 0) {
-      public_fields_ = ParseBoolean(line.c_str() + 15);
-    } else if (line.compare(0, 16, "private fields: ") == 0) {
-      private_fields_ = ParseBoolean(line.c_str() + 16);
     } else if (line.compare(0, 16, "private methods: ") == 0) {
       private_methods_ = ParseBoolean(line.c_str() + 16);
-    } else if (line.compare(0, 15, "static fields: ") == 0) {
-      static_fields_ = ParseBoolean(line.c_str() + 15);
     } else if (line == "---") {
       break;
     } else if (line.empty()) {
@@ -344,10 +323,7 @@ void ProgramOptions::PrintHeader(std::ostream& stream) const {  // NOLINT
   if (print_callee_) stream << "\nprint callee: yes";
   if (oneshot_opt_) stream << "\noneshot opt: yes";
   if (async_iteration_) stream << "\nasync iteration: yes";
-  if (public_fields_) stream << "\npublic fields: yes";
-  if (private_fields_) stream << "\nprivate fields: yes";
   if (private_methods_) stream << "\nprivate methods: yes";
-  if (static_fields_) stream << "\nstatic fields: yes";
 
   stream << "\n\n";
 }
@@ -456,10 +432,7 @@ void GenerateExpectationsFile(std::ostream& stream,  // NOLINT
     printer.set_test_function_name(options.test_function_name());
   }
 
-  if (options.public_fields()) i::FLAG_harmony_public_fields = true;
-  if (options.private_fields()) i::FLAG_harmony_private_fields = true;
   if (options.private_methods()) i::FLAG_harmony_private_methods = true;
-  if (options.static_fields()) i::FLAG_harmony_static_fields = true;
 
   stream << "#\n# Autogenerated by generate-bytecode-expectations.\n#\n\n";
   options.PrintHeader(stream);
@@ -467,10 +440,7 @@ void GenerateExpectationsFile(std::ostream& stream,  // NOLINT
     printer.PrintExpectation(stream, snippet);
   }
 
-  i::FLAG_harmony_public_fields = false;
-  i::FLAG_harmony_private_fields = false;
   i::FLAG_harmony_private_methods = false;
-  i::FLAG_harmony_static_fields = false;
 }
 
 bool WriteExpectationsFile(const std::vector<std::string>& snippet_list,
@@ -519,10 +489,7 @@ void PrintUsage(const char* exec_path) {
          "  --test-function-name=foo  "
          "Specify the name of the test function.\n"
          "  --top-level   Process top level code, not the top-level function.\n"
-         "  --public-fields  Enable harmony_public_fields flag.\n"
-         "  --private-fields  Enable harmony_private_fields flag.\n"
          "  --private-methods  Enable harmony_private_methods flag.\n"
-         "  --static-fields  Enable harmony_static_fields flag.\n"
          "  --output=file.name\n"
          "      Specify the output file. If not specified, output goes to "
          "stdout.\n"

test/cctest/interpreter/test-bytecode-generator.cc

@@ -2650,8 +2650,6 @@ TEST(ClassAndSuperClass) {
 }
 
 TEST(PublicClassFields) {
-  bool old_flag = i::FLAG_harmony_public_fields;
-  i::FLAG_harmony_public_fields = true;
   InitializedIgnitionHandleScope scope;
   BytecodeExpectationsPrinter printer(CcTest::isolate());
 
@@ -2700,12 +2698,9 @@ TEST(PublicClassFields) {
 
   CHECK(CompareTexts(BuildActual(printer, snippets),
                      LoadGolden("PublicClassFields.golden")));
-  i::FLAG_harmony_public_fields = old_flag;
 }
 
 TEST(PrivateClassFields) {
-  bool old_flag = i::FLAG_harmony_private_fields;
-  i::FLAG_harmony_private_fields = true;
   InitializedIgnitionHandleScope scope;
   BytecodeExpectationsPrinter printer(CcTest::isolate());
 
@@ -2760,14 +2755,9 @@ TEST(PrivateClassFields) {
 
   CHECK(CompareTexts(BuildActual(printer, snippets),
                      LoadGolden("PrivateClassFields.golden")));
-  i::FLAG_harmony_private_fields = old_flag;
 }
 
 TEST(StaticClassFields) {
-  bool old_flag = i::FLAG_harmony_public_fields;
-  bool old_static_flag = i::FLAG_harmony_static_fields;
-  i::FLAG_harmony_public_fields = true;
-  i::FLAG_harmony_static_fields = true;
   InitializedIgnitionHandleScope scope;
   BytecodeExpectationsPrinter printer(CcTest::isolate());
 
@@ -2826,8 +2816,6 @@ TEST(StaticClassFields) {
 
   CHECK(CompareTexts(BuildActual(printer, snippets),
                      LoadGolden("StaticClassFields.golden")));
-  i::FLAG_harmony_public_fields = old_flag;
-  i::FLAG_harmony_static_fields = old_static_flag;
 }
 
 TEST(Generators) {

test/cctest/parsing/test-preparser.cc

@@ -110,9 +110,6 @@ TEST(PreParserScopeAnalysis) {
     Inner(const char* p, const char* s, SkipTests skip, Bailout bailout)
         : params(p), source(s), skip(skip), bailout(bailout) {}
 
-    Inner(const char* s, std::function<void()> p, std::function<void()> e)
-        : source(s), prologue(p), epilogue(e) {}
-
     const char* params = "";
     const char* source;
     SkipTests skip = DONT_SKIP;
@@ -659,33 +656,11 @@ TEST(PreParserScopeAnalysis) {
       {"class MyClass extends MyBase { static m() { var var1; function foo() { "
        "var1 = 11; } } }"},
 
-      {"class X { ['bar'] = 1; }; new X;",
-       [] { i::FLAG_harmony_public_fields = true; },
-       [] { i::FLAG_harmony_public_fields = false; }},
-      {"class X { static ['foo'] = 2; }; new X;",
-       [] {
-         i::FLAG_harmony_public_fields = true;
-         i::FLAG_harmony_static_fields = true;
-       },
-       [] {
-         i::FLAG_harmony_public_fields = false;
-         i::FLAG_harmony_static_fields = false;
-       }},
-      {"class X { ['bar'] = 1; static ['foo'] = 2; }; new X;",
-       [] {
-         i::FLAG_harmony_public_fields = true;
-         i::FLAG_harmony_static_fields = true;
-       },
-       [] {
-         i::FLAG_harmony_public_fields = false;
-         i::FLAG_harmony_static_fields = false;
-       }},
-      {"class X { #x = 1 }; new X;",
-       [] { i::FLAG_harmony_private_fields = true; },
-       [] { i::FLAG_harmony_private_fields = false; }},
-      {"function t() { return class { #x = 1 }; } new t();",
-       [] { i::FLAG_harmony_private_fields = true; },
-       [] { i::FLAG_harmony_private_fields = false; }},
+      {"class X { ['bar'] = 1; }; new X;"},
+      {"class X { static ['foo'] = 2; }; new X;"},
+      {"class X { ['bar'] = 1; static ['foo'] = 2; }; new X;"},
+      {"class X { #x = 1 }; new X;"},
+      {"function t() { return class { #x = 1 }; } new t();"},
   };
 
   for (unsigned i = 0; i < arraysize(outers); ++i) {
@@ -705,8 +680,6 @@ TEST(PreParserScopeAnalysis) {
       int source_len = Utf8LengthHelper(inner.source);
       int len = code_len + params_len + source_len;
 
-      if (inner.prologue != nullptr) inner.prologue();
-
       i::ScopedVector<char> program(len + 1);
       i::SNPrintF(program, code, inner.params, inner.source);
 
@@ -770,8 +743,6 @@ TEST(PreParserScopeAnalysis) {
       i::ScopeTestHelper::CompareScopes(
           scope_without_skipped_functions, scope_with_skipped_functions,
           inner.precise_maybe_assigned == PreciseMaybeAssigned::YES);
-
-      if (inner.epilogue != nullptr) inner.epilogue();
     }
   }
 }

test/cctest/test-debug.cc

@@ -4546,8 +4546,6 @@ TEST(GetPrivateFields) {
   v8::internal::Isolate* isolate = CcTest::i_isolate();
   v8::HandleScope scope(v8_isolate);
   v8::Local<v8::Context> context = env.local();
-  v8::internal::FLAG_harmony_class_fields = true;
-  v8::internal::FLAG_harmony_private_fields = true;
   v8::Local<v8::String> source = v8_str(
       "var X = class {\n"
       "  #foo = 1;\n"

test/message/fail/class-field-constructor.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-public-fields
 
 class X {
   constructor = function() {};

test/message/fail/class-field-constructor.out

-*%(basename)s:8: SyntaxError: Classes may not have a field named 'constructor'
+*%(basename)s:6: SyntaxError: Classes may not have a field named 'constructor'
   constructor = function() {};
   ^^^^^^^^^^^
 SyntaxError: Classes may not have a field named 'constructor'
\ No newline at end of file

test/message/fail/class-field-static-constructor.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-public-fields --harmony-static-fields
 
 class X {
   static constructor = function() {};

test/message/fail/class-field-static-constructor.out

-*%(basename)s:8: SyntaxError: Classes may not have a field named 'constructor'
+*%(basename)s:6: SyntaxError: Classes may not have a field named 'constructor'
   static constructor = function() {};
          ^^^^^^^^^^^
 SyntaxError: Classes may not have a field named 'constructor'
\ No newline at end of file

test/message/fail/class-field-static-prototype.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-public-fields --harmony-static-fields
 
 class X {
   static prototype = function() {};

test/message/fail/class-field-static-prototype.out

-*%(basename)s:8: SyntaxError: Classes may not have a static property named 'prototype'
+*%(basename)s:6: SyntaxError: Classes may not have a static property named 'prototype'
   static prototype = function() {};
          ^^^^^^^^^
 SyntaxError: Classes may not have a static property named 'prototype'
\ No newline at end of file

test/message/fail/class-fields-computed.js

 // Copyright 2018 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-public-fields
 
 class X {
   [foo()] = 1;

test/message/fail/class-fields-computed.out

-*%(basename)s:8: ReferenceError: foo is not defined
+*%(basename)s:6: ReferenceError: foo is not defined
   [foo()] = 1;
    ^
 ReferenceError: foo is not defined
-    at *%(basename)s:8:4
+    at *%(basename)s:6:4
\ No newline at end of file

test/message/fail/class-fields-private-class-in-function.js

 // Copyright 2019 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-private-fields
 
 class Y {
   makeClass() {

test/message/fail/class-fields-private-class-in-function.out

-*%(basename)s:12: SyntaxError: Undefined private field #b: must be declared in an enclosing class
+*%(basename)s:10: SyntaxError: Undefined private field #b: must be declared in an enclosing class
       getB() { return this.#b; }
                           ^
 SyntaxError: Undefined private field #b: must be declared in an enclosing class

test/message/fail/class-fields-private-source-positions.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-private-fields
-
 var o = {};
 class C {
     #a = 0;

test/message/fail/class-fields-private-source-positions.out

-*%(basename)s:11: TypeError: Read of private field #a from an object which did not contain the field
+*%(basename)s:9: TypeError: Read of private field #a from an object which did not contain the field
     [o.#a](){}
        ^
 TypeError: Read of private field #a from an object which did not contain the field
-    at *%(basename)s:11:8
+    at *%(basename)s:9:8

test/message/fail/class-fields-private-throw-early-2.js

 // Copyright 2018 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-private-fields
 
 class X {
   #x;

test/message/fail/class-fields-private-throw-early-2.out

-*%(basename)s:10: TypeError: Write of private field #x to an object which did not contain the field
+*%(basename)s:8: TypeError: Write of private field #x to an object which did not contain the field
     ({}).#x = 1;
             ^
 TypeError: Write of private field #x to an object which did not contain the field
-    at new X (*%(basename)s:10:13)
-    at *%(basename)s:14:1
+    at new X (*%(basename)s:8:13)
+    at *%(basename)s:12:1
\ No newline at end of file

test/message/fail/class-fields-private-throw-early.js

 // Copyright 2018 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-private-fields
 
 class X {
   constructor() {

test/message/fail/class-fields-private-throw-early.out

-*%(basename)s:9: SyntaxError: Undefined private field #x: must be declared in an enclosing class
+*%(basename)s:7: SyntaxError: Undefined private field #x: must be declared in an enclosing class
     this.#x = 1;
         ^
 SyntaxError: Undefined private field #x: must be declared in an enclosing class
\ No newline at end of file

test/message/fail/class-fields-private-throw-in-module.js

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 //
 // MODULE
-// Flags: --harmony-private-fields
 
 class X {
   constructor() {

test/message/fail/class-fields-private-throw-in-module.out

-*%(basename)s:10: SyntaxError: Undefined private field #x: must be declared in an enclosing class
+*%(basename)s:9: SyntaxError: Undefined private field #x: must be declared in an enclosing class
     this.#x = 1;
         ^
 SyntaxError: Undefined private field #x: must be declared in an enclosing class
\ No newline at end of file

test/message/fail/class-fields-private-throw-read.js

 // Copyright 2018 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-private-fields
 
 class X {
   #x;

test/message/fail/class-fields-private-throw-read.out

-*%(basename)s:9: TypeError: Read of private field #x from an object which did not contain the field
+*%(basename)s:7: TypeError: Read of private field #x from an object which did not contain the field
   eq(o) { return this.#x === o.#x; }
                                ^
 TypeError: Read of private field #x from an object which did not contain the field
-    at X.eq (*%(basename)s:9:32)
-    at *%(basename)s:12:9
+    at X.eq (*%(basename)s:7:32)
+    at *%(basename)s:10:9
\ No newline at end of file

test/message/fail/class-fields-private-throw-write.js

 // Copyright 2018 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-private-fields
 
 class X {
   #x;

test/message/fail/class-fields-private-throw-write.out

-*%(basename)s:9: TypeError: Write of private field #x to an object which did not contain the field
+*%(basename)s:7: TypeError: Write of private field #x to an object which did not contain the field
   setX(o, val) { o.#x = val; }
                       ^
 TypeError: Write of private field #x to an object which did not contain the field
-    at X.setX (*%(basename)s:9:23)
-    at *%(basename)s:12:9
+    at X.setX (*%(basename)s:7:23)
+    at *%(basename)s:10:9
\ No newline at end of file

test/message/fail/class-fields-private-undefined-inner-class.js

 // Copyright 2019 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-private-fields
 
 class A {
   fn() {

test/message/fail/class-fields-private-undefined-inner-class.out

-*%(basename)s:10: SyntaxError: Undefined private field #b: must be declared in an enclosing class
+*%(basename)s:8: SyntaxError: Undefined private field #b: must be declared in an enclosing class
       getA() { return this.#b; }
                           ^
 SyntaxError: Undefined private field #b: must be declared in an enclosing class

test/message/fail/class-fields-static-throw.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Flags: --harmony-public-fields --harmony-static-fields
-//
 // TODO(gsathya): Remove 'Function' from stack trace.
 
 class X {

test/message/fail/class-fields-static-throw.out

-*%(basename)s:10: ReferenceError: foo is not defined
+*%(basename)s:8: ReferenceError: foo is not defined
   static x = foo();
              ^
 ReferenceError: foo is not defined
-    at Function.<static_fields_initializer> (*%(basename)s:10:14)
+    at Function.<static_fields_initializer> (*%(basename)s:8:14)
     at *%(basename)s:1:1
\ No newline at end of file

test/message/fail/class-fields-throw.js

 // Copyright 2018 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-// Flags: --harmony-public-fields
 
 class X {
   x = foo();

test/message/fail/class-fields-throw.out

-*%(basename)s:8: ReferenceError: foo is not defined
+*%(basename)s:6: ReferenceError: foo is not defined
   x = foo();
       ^
 ReferenceError: foo is not defined
-    at X.<instance_members_initializer> (*%(basename)s:8:7)
-    at new X (*%(basename)s:7:1)
-    at *%(basename)s:11:1
+    at X.<instance_members_initializer> (*%(basename)s:6:7)
+    at new X (*%(basename)s:5:1)
+    at *%(basename)s:9:1
\ No newline at end of file

test/message/fail/destructuring-object-private-name.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-class-fields
-
 class Foo {
   #x = 1;
   destructureX() {

test/message/fail/destructuring-object-private-name.out

-*%(basename)s:10: SyntaxError: Unexpected identifier
+*%(basename)s:8: SyntaxError: Unexpected identifier
     const { #x: x } = this;
             ^^
 SyntaxError: Unexpected identifier

test/mjsunit/harmony/private-fields-ic.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-private-fields
-
 {
   class X {
     #x = 1;

test/mjsunit/harmony/private-fields-special-object.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-private-fields --allow-natives-syntax
+// Flags: --allow-natives-syntax
 
 load('test/mjsunit/test-async.js');
 

test/mjsunit/harmony/private-fields-static.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-private-fields --allow-natives-syntax
+// Flags: --allow-natives-syntax
 
 
 "use strict";

test/mjsunit/harmony/private-fields.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-private-fields --allow-natives-syntax
+// Flags: --allow-natives-syntax
 
 
 "use strict";

test/mjsunit/harmony/public-instance-class-fields.js

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-public-fields
 "use strict";
 
 {

test/mjsunit/harmony/public-static-class-fields.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-public-fields --harmony-static-fields
-
 "use strict";
 
 {

test/mjsunit/harmony/regress/regress-8808.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-class-fields
-
 assertThrows(() => eval(`
   class Foo {
     #x = 1;

test/test262/testcfg.py

@@ -44,10 +44,6 @@ from testrunner.outproc import test262
 
 # TODO(littledan): move the flag mapping into the status file
 FEATURE_FLAGS = {
-  'class-fields-public': '--harmony-public-fields',
-  'class-static-fields-public': '--harmony-class-fields',
-  'class-fields-private': '--harmony-private-fields',
-  'class-static-fields-private': '--harmony-private-fields',
   'numeric-separator-literal': '--harmony-numeric-separator',
   'Intl.DateTimeFormat-datetimestyle': '--harmony-intl-datetime-style',
   'Intl.Locale': '--harmony-locale',