Refactor object/class literal property name parsing

This patch arranges that property names are parsed in a single pass,
reporting the name as well as the type of the property, instead of
parsing qualifiers like 'static' or 'get' initially as names and then
re-parsing. This change is easier to reason about, very slightly (4%)
faster in some cases (although slower in other, less common ones, though
this slowdown will be fixed in an upcoming patch), and is a prerequisite
for separating the parsing of object and class literal properties, which
will become increasingly important as ECMAScript adds more class features.

This is a reland of https://codereview.chromium.org/2278153004/,
which fixes the issue causing the revert and adds more tests.

Review-Url: https://codereview.chromium.org/2300503002
Cr-Commit-Position: refs/heads/master@{#39056}

src/parsing/parser-base.h

@@ -1108,13 +1108,25 @@ class ParserBase {
   ExpressionT ParseExpression(bool accept_IN, ExpressionClassifier* classifier,
                               bool* ok);
   ExpressionT ParseArrayLiteral(ExpressionClassifier* classifier, bool* ok);
-  ExpressionT ParsePropertyName(IdentifierT* name, bool* is_get, bool* is_set,
+
+  enum class PropertyKind {
+    kAccessorProperty,
+    kValueProperty,
+    kShorthandProperty,
+    kMethodProperty,
+    kNotSet
+  };
+
+  bool SetPropertyKindFromToken(Token::Value token, PropertyKind* kind);
+  ExpressionT ParsePropertyName(IdentifierT* name, PropertyKind* kind,
+                                bool in_class, bool* is_generator, bool* is_get,
+                                bool* is_set, bool* is_async, bool* is_static,
                                 bool* is_computed_name,
                                 ExpressionClassifier* classifier, bool* ok);
   ExpressionT ParseObjectLiteral(ExpressionClassifier* classifier, bool* ok);
   ObjectLiteralPropertyT ParsePropertyDefinition(
       ObjectLiteralCheckerBase* checker, bool in_class, bool has_extends,
-      MethodKind kind, bool* is_computed_name, bool* has_seen_constructor,
+      bool* is_computed_name, bool* has_seen_constructor,
       ExpressionClassifier* classifier, IdentifierT* name, bool* ok);
   typename Types::ExpressionList ParseArguments(
       Scanner::Location* first_spread_pos, bool maybe_arrow,
@@ -1213,13 +1225,6 @@ class ParserBase {
     return Call::NOT_EVAL;
   }
 
-  // Used to validate property names in object literals and class literals
-  enum PropertyKind {
-    kAccessorProperty,
-    kValueProperty,
-    kMethodProperty
-  };
-
   class ObjectLiteralCheckerBase {
    public:
     explicit ObjectLiteralCheckerBase(ParserBase* parser) : parser_(parser) {}
@@ -1853,13 +1858,104 @@ typename ParserBase<Impl>::ExpressionT ParserBase<Impl>::ParseArrayLiteral(
   return result;
 }
 
+template <class Impl>
+bool ParserBase<Impl>::SetPropertyKindFromToken(Token::Value token,
+                                                PropertyKind* kind) {
+  // This returns true, setting the property kind, iff the given token is one
+  // which must occur after a property name, indicating that the previous token
+  // was in fact a name and not a modifier (like the "get" in "get x").
+  switch (token) {
+    case Token::COLON:
+      *kind = PropertyKind::kValueProperty;
+      return true;
+    case Token::COMMA:
+    case Token::RBRACE:
+    case Token::ASSIGN:
+      *kind = PropertyKind::kShorthandProperty;
+      return true;
+    case Token::LPAREN:
+      *kind = PropertyKind::kMethodProperty;
+      return true;
+    default:
+      break;
+  }
+  return false;
+}
+
 template <class Impl>
 typename ParserBase<Impl>::ExpressionT ParserBase<Impl>::ParsePropertyName(
-    IdentifierT* name, bool* is_get, bool* is_set, bool* is_computed_name,
+    IdentifierT* name, PropertyKind* kind, bool in_class, bool* is_generator,
-    ExpressionClassifier* classifier, bool* ok) {
+    bool* is_get, bool* is_set, bool* is_async, bool* is_static,
+    bool* is_computed_name, ExpressionClassifier* classifier, bool* ok) {
+  DCHECK(*kind == PropertyKind::kNotSet);
+  DCHECK(!*is_generator);
+  DCHECK(!*is_get);
+  DCHECK(!*is_set);
+  DCHECK(!*is_async);
+  DCHECK(!*is_static);
+  DCHECK(!*is_computed_name);
+
+  *is_generator = Check(Token::MUL);
+  if (*is_generator) {
+    *kind = PropertyKind::kMethodProperty;
+  }
+
   Token::Value token = peek();
   int pos = peek_position();
 
+  if (in_class && !*is_generator && token == Token::STATIC) {
+    Consume(Token::STATIC);
+    *kind = PropertyKind::kMethodProperty;
+    if (peek() == Token::LPAREN) {
+      *name = impl()->GetSymbol();  // TODO(bakkot) specialize on 'static'
+      return factory()->NewStringLiteral(*name, pos);
+    }
+    *is_generator = Check(Token::MUL);
+    *is_static = true;
+    token = peek();
+    pos = peek_position();
+  }
+
+  if (allow_harmony_async_await() && !*is_generator && token == Token::ASYNC &&
+      !scanner()->HasAnyLineTerminatorAfterNext()) {
+    Consume(Token::ASYNC);
+    token = peek();
+    if (SetPropertyKindFromToken(token, kind)) {
+      *name = impl()->GetSymbol();  // TODO(bakkot) specialize on 'async'
+      if (fni_ != nullptr) {
+        impl()->PushLiteralName(fni_, *name);
+      }
+      return factory()->NewStringLiteral(*name, pos);
+    }
+    *kind = PropertyKind::kMethodProperty;
+    *is_async = true;
+    pos = peek_position();
+  }
+
+  if (token == Token::IDENTIFIER && !*is_generator && !*is_async) {
+    // This is checking for 'get' and 'set' in particular. Any other identifier
+    // must be the property name, and so SetPropertyKindFromToken will return
+    // true (unless there's a syntax error).
+    Consume(Token::IDENTIFIER);
+    token = peek();
+    if (SetPropertyKindFromToken(token, kind)) {
+      *name = impl()->GetSymbol();
+      if (fni_ != nullptr) {
+        impl()->PushLiteralName(fni_, *name);
+      }
+      return factory()->NewStringLiteral(*name, pos);
+    }
+    scanner()->IsGetOrSet(is_get, is_set);
+    if (!*is_get && !*is_set) {  // TODO(bakkot) have IsGetOrSet return a bool
+      Token::Value next = Next();
+      ReportUnexpectedToken(next);
+      *ok = false;
+      return impl()->EmptyExpression();
+    }
+    *kind = PropertyKind::kAccessorProperty;
+    pos = peek_position();
+  }
+
   // For non computed property names we normalize the name a bit:
   //
   //   "12" -> 12
@@ -1869,6 +1965,7 @@ typename ParserBase<Impl>::ExpressionT ParserBase<Impl>::ParsePropertyName(
   //
   // This is important because we use the property name as a key in a hash
   // table when we compute constant properties.
+  ExpressionT expression = impl()->EmptyExpression();
   switch (token) {
     case Token::STRING:
       Consume(Token::STRING);
@@ -1886,24 +1983,45 @@ typename ParserBase<Impl>::ExpressionT ParserBase<Impl>::ParsePropertyName(
       break;
 
     case Token::LBRACK: {
+      *name = impl()->EmptyIdentifier();
       *is_computed_name = true;
       Consume(Token::LBRACK);
       ExpressionClassifier computed_name_classifier(this);
-      ExpressionT expression =
+      expression =
           ParseAssignmentExpression(true, &computed_name_classifier, CHECK_OK);
       impl()->RewriteNonPattern(&computed_name_classifier, CHECK_OK);
       classifier->AccumulateFormalParameterContainmentErrors(
           &computed_name_classifier);
       Expect(Token::RBRACK, CHECK_OK);
-      return expression;
+      break;
     }
 
     default:
       *name = ParseIdentifierName(CHECK_OK);
-      scanner()->IsGetOrSet(is_get, is_set);
       break;
   }
 
+  if (*kind == PropertyKind::kNotSet) {
+    if (!SetPropertyKindFromToken(peek(), kind) ||
+        (*kind == PropertyKind::kShorthandProperty &&
+         !Token::IsIdentifier(token, language_mode(), this->is_generator(),
+                              parsing_module_ || is_async_function()))) {
+      Token::Value next = Next();
+      ReportUnexpectedToken(next);
+      *ok = false;
+      return impl()->EmptyExpression();
+    }
+  }
+  DCHECK(*kind != PropertyKind::kNotSet);
+
+  if (*is_computed_name) {
+    return expression;
+  }
+
+  if (fni_ != nullptr) {
+    impl()->PushLiteralName(fni_, *name);
+  }
+
   uint32_t index;
   return impl()->IsArrayIndex(*name, &index)
              ? factory()->NewNumberLiteral(index, pos)
@@ -1912,46 +2030,43 @@ typename ParserBase<Impl>::ExpressionT ParserBase<Impl>::ParsePropertyName(
 
 template <typename Impl>
 typename ParserBase<Impl>::ObjectLiteralPropertyT
-ParserBase<Impl>::ParsePropertyDefinition(
+ParserBase<Impl>::ParsePropertyDefinition(ObjectLiteralCheckerBase* checker,
-    ObjectLiteralCheckerBase* checker, bool in_class, bool has_extends,
+                                          bool in_class, bool has_extends,
-    MethodKind method_kind, bool* is_computed_name, bool* has_seen_constructor,
+                                          bool* is_computed_name,
-    ExpressionClassifier* classifier, IdentifierT* name, bool* ok) {
+                                          bool* has_seen_constructor,
-  DCHECK(!in_class || IsStaticMethod(method_kind) ||
+                                          ExpressionClassifier* classifier,
-         has_seen_constructor != nullptr);
+                                          IdentifierT* name, bool* ok) {
+  DCHECK(!in_class || has_seen_constructor != nullptr);
   bool is_get = false;
   bool is_set = false;
-  bool is_generator = Check(Token::MUL);
+  bool is_generator = false;
   bool is_async = false;
-  const bool is_static = IsStaticMethod(method_kind);
+  bool is_static = false;
+  PropertyKind kind = PropertyKind::kNotSet;
 
   Token::Value name_token = peek();
-
-  if (is_generator) {
-    method_kind |= MethodKind::kGenerator;
-  } else if (allow_harmony_async_await() && name_token == Token::ASYNC &&
-             !scanner()->HasAnyLineTerminatorAfterNext() &&
-             PeekAhead() != Token::LPAREN && PeekAhead()) {
-    is_async = true;
-  }
-
   int next_beg_pos = scanner()->peek_location().beg_pos;
   int next_end_pos = scanner()->peek_location().end_pos;
+
   ExpressionT name_expression =
-      ParsePropertyName(name, &is_get, &is_set, is_computed_name, classifier,
+      ParsePropertyName(name, &kind, in_class, &is_generator, &is_get, &is_set,
+                        &is_async, &is_static, is_computed_name, classifier,
                         CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
 
-  if (fni_ != nullptr && !*is_computed_name) {
+  switch (kind) {
-    impl()->PushLiteralName(fni_, *name);
+    case PropertyKind::kValueProperty: {
+      if (in_class) {
+        Token::Value next = Next();
+        ReportUnexpectedToken(next);
+        *ok = false;
+        return impl()->EmptyObjectLiteralProperty();
       }
 
-  if (!in_class && !is_generator) {
+      DCHECK(!is_get && !is_set && !is_generator && !is_async && !is_static);
-    DCHECK(!IsStaticMethod(method_kind));
+
-    if (peek() == Token::COLON) {
-      // PropertyDefinition
-      //    PropertyName ':' AssignmentExpression
       if (!*is_computed_name) {
-        checker->CheckProperty(name_token, kValueProperty, MethodKind::kNormal,
+        checker->CheckProperty(name_token, PropertyKind::kValueProperty,
-                               classifier,
+                               MethodKind::kNormal, classifier,
                                CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
       }
       Consume(Token::COLON);
@@ -1965,16 +2080,23 @@ ParserBase<Impl>::ParsePropertyDefinition(
                                                  is_static, *is_computed_name);
     }
 
-    if (Token::IsIdentifier(name_token, language_mode(), this->is_generator(),
+    case PropertyKind::kShorthandProperty: {
-                            parsing_module_ || is_async_function()) &&
-        (peek() == Token::COMMA || peek() == Token::RBRACE ||
-         peek() == Token::ASSIGN)) {
       // PropertyDefinition
       //    IdentifierReference
       //    CoverInitializedName
       //
       // CoverInitializedName
       //    IdentifierReference Initializer?
+      if (in_class) {
+        Token::Value next = Next();
+        ReportUnexpectedToken(next);
+        *ok = false;
+        return impl()->EmptyObjectLiteralProperty();
+      }
+
+      DCHECK(!is_get && !is_set && !is_generator && !is_async && !is_static &&
+             !*is_computed_name);
+
       if (classifier->duplicate_finder() != nullptr &&
           scanner()->FindSymbol(classifier->duplicate_finder(), 1) != 0) {
         classifier->RecordDuplicateFormalParameterError(scanner()->location());
@@ -2023,30 +2145,32 @@ ParserBase<Impl>::ParsePropertyDefinition(
           name_expression, value, ObjectLiteralProperty::COMPUTED, is_static,
           false);
     }
+
+    case PropertyKind::kMethodProperty: {
+      DCHECK(!is_get && !is_set);
+
+      MethodKind method_kind = MethodKind::kNormal;
+      if (is_generator) {
+        method_kind |= MethodKind::kGenerator;
+      }
+      if (is_async) {
+        method_kind |= MethodKind::kAsync;
+      }
+      if (is_static) {
+        method_kind |= MethodKind::kStatic;
       }
 
-  // Method definitions are never valid in patterns.
+      // MethodDefinition
+      //    PropertyName '(' StrictFormalParameters ')' '{' FunctionBody '}'
+      //    '*' PropertyName '(' StrictFormalParameters ')' '{' FunctionBody '}'
+
       classifier->RecordPatternError(
           Scanner::Location(next_beg_pos, scanner()->location().end_pos),
           MessageTemplate::kInvalidDestructuringTarget);
 
-  if (is_async && !IsSpecialMethod(method_kind)) {
-    DCHECK(!is_get);
-    DCHECK(!is_set);
-    bool dont_care;
-    name_expression = ParsePropertyName(
-        name, &dont_care, &dont_care, is_computed_name, classifier,
-        CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
-    method_kind |= MethodKind::kAsync;
-  }
-
-  if (is_generator || peek() == Token::LPAREN) {
-    // MethodDefinition
-    //    PropertyName '(' StrictFormalParameters ')' '{' FunctionBody '}'
-    //    '*' PropertyName '(' StrictFormalParameters ')' '{' FunctionBody '}'
       if (!*is_computed_name) {
-      checker->CheckProperty(name_token, kMethodProperty, method_kind,
+        checker->CheckProperty(name_token, PropertyKind::kMethodProperty,
-                             classifier,
+                               method_kind, classifier,
                                CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
       }
 
@@ -2055,8 +2179,7 @@ ParserBase<Impl>::ParsePropertyDefinition(
                               : is_async ? FunctionKind::kAsyncConciseMethod
                                          : FunctionKind::kConciseMethod;
 
-    if (in_class && !IsStaticMethod(method_kind) &&
+      if (in_class && !is_static && impl()->IsConstructor(*name)) {
-        impl()->IsConstructor(*name)) {
         *has_seen_constructor = true;
         kind = has_extends ? FunctionKind::kSubclassConstructor
                            : FunctionKind::kBaseConstructor;
@@ -2064,48 +2187,38 @@ ParserBase<Impl>::ParsePropertyDefinition(
 
       ExpressionT value = impl()->ParseFunctionLiteral(
           *name, scanner()->location(), kSkipFunctionNameCheck, kind,
-        kNoSourcePosition, FunctionLiteral::kAccessorOrMethod, language_mode(),
+          kNoSourcePosition, FunctionLiteral::kAccessorOrMethod,
-        CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
+          language_mode(), CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
 
-    return factory()->NewObjectLiteralProperty(name_expression, value,
+      return factory()->NewObjectLiteralProperty(
-                                               ObjectLiteralProperty::COMPUTED,
+          name_expression, value, ObjectLiteralProperty::COMPUTED, is_static,
-                                               is_static, *is_computed_name);
+          *is_computed_name);
     }
 
-  if (in_class && name_token == Token::STATIC && IsNormalMethod(method_kind)) {
+    case PropertyKind::kAccessorProperty: {
-    // ClassElement (static)
+      DCHECK((is_get || is_set) && !is_generator && !is_async);
-    //    'static' MethodDefinition
+
-    *name = impl()->EmptyIdentifier();
+      MethodKind method_kind = MethodKind::kNormal;
-    ObjectLiteralPropertyT property = ParsePropertyDefinition(
+      if (is_static) {
-        checker, true, has_extends, MethodKind::kStatic, is_computed_name,
+        DCHECK(in_class);
-        nullptr, classifier, name, ok);
+        method_kind |= MethodKind::kStatic;
-    impl()->RewriteNonPattern(classifier, ok);
-    return property;
       }
 
-  if (is_get || is_set) {
+      classifier->RecordPatternError(
-    // MethodDefinition (Accessors)
+          Scanner::Location(next_beg_pos, scanner()->location().end_pos),
-    //    get PropertyName '(' ')' '{' FunctionBody '}'
+          MessageTemplate::kInvalidDestructuringTarget);
-    //    set PropertyName '(' PropertySetParameterList ')' '{' FunctionBody '}'
-    *name = impl()->EmptyIdentifier();
-    bool dont_care = false;
-    name_token = peek();
-
-    name_expression = ParsePropertyName(
-        name, &dont_care, &dont_care, is_computed_name, classifier,
-        CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
-
       if (!*is_computed_name) {
-      checker->CheckProperty(name_token, kAccessorProperty, method_kind,
+        checker->CheckProperty(name_token, PropertyKind::kAccessorProperty,
-                             classifier,
+                               method_kind, classifier,
                                CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
       }
 
-    FunctionLiteralT value = impl()->ParseFunctionLiteral(
+      typename Types::FunctionLiteral value = impl()->ParseFunctionLiteral(
           *name, scanner()->location(), kSkipFunctionNameCheck,
-        is_get ? FunctionKind::kGetterFunction : FunctionKind::kSetterFunction,
+          is_get ? FunctionKind::kGetterFunction
-        kNoSourcePosition, FunctionLiteral::kAccessorOrMethod, language_mode(),
+                 : FunctionKind::kSetterFunction,
-        CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
+          kNoSourcePosition, FunctionLiteral::kAccessorOrMethod,
+          language_mode(), CHECK_OK_CUSTOM(EmptyObjectLiteralProperty));
 
       // Make sure the name expression is a string since we need a Name for
       // Runtime_DefineAccessorPropertyUnchecked and since we can determine this
@@ -2116,14 +2229,15 @@ ParserBase<Impl>::ParsePropertyDefinition(
       }
 
       return factory()->NewObjectLiteralProperty(
-        name_expression, value,
+          name_expression, value, is_get ? ObjectLiteralProperty::GETTER
-        is_get ? ObjectLiteralProperty::GETTER : ObjectLiteralProperty::SETTER,
+                                         : ObjectLiteralProperty::SETTER,
           is_static, *is_computed_name);
     }
 
-  Token::Value next = Next();
+    case PropertyKind::kNotSet:
-  ReportUnexpectedToken(next);
+      UNREACHABLE();
-  *ok = false;
+  }
+  UNREACHABLE();
   return impl()->EmptyObjectLiteralProperty();
 }
 
@@ -2149,8 +2263,8 @@ typename ParserBase<Impl>::ExpressionT ParserBase<Impl>::ParseObjectLiteral(
     bool is_computed_name = false;
     IdentifierT name = impl()->EmptyIdentifier();
     ObjectLiteralPropertyT property = ParsePropertyDefinition(
-        &checker, in_class, has_extends, MethodKind::kNormal, &is_computed_name,
+        &checker, in_class, has_extends, &is_computed_name, nullptr, classifier,
-        NULL, classifier, &name, CHECK_OK);
+        &name, CHECK_OK);
 
     if (is_computed_name) {
       has_computed_names = true;
@@ -3640,11 +3754,12 @@ void ParserBase<Impl>::ObjectLiteralChecker::CheckProperty(
     Token::Value property, PropertyKind type, MethodKind method_type,
     ExpressionClassifier* classifier, bool* ok) {
   DCHECK(!IsStaticMethod(method_type));
-  DCHECK(!IsSpecialMethod(method_type) || type == kMethodProperty);
+  DCHECK(!IsSpecialMethod(method_type) ||
+         type == PropertyKind::kMethodProperty);
 
   if (property == Token::SMI || property == Token::NUMBER) return;
 
-  if (type == kValueProperty && IsProto()) {
+  if (type == PropertyKind::kValueProperty && IsProto()) {
     if (has_seen_proto_) {
       classifier->RecordExpressionError(this->scanner()->location(),
                                         MessageTemplate::kDuplicateProto);
@@ -3658,7 +3773,8 @@ template <typename Impl>
 void ParserBase<Impl>::ClassLiteralChecker::CheckProperty(
     Token::Value property, PropertyKind type, MethodKind method_type,
     ExpressionClassifier* classifier, bool* ok) {
-  DCHECK(type == kMethodProperty || type == kAccessorProperty);
+  DCHECK(type == PropertyKind::kMethodProperty ||
+         type == PropertyKind::kAccessorProperty);
 
   if (property == Token::SMI || property == Token::NUMBER) return;
 
@@ -3671,7 +3787,7 @@ void ParserBase<Impl>::ClassLiteralChecker::CheckProperty(
   } else if (IsConstructor()) {
     const bool is_generator = IsGeneratorMethod(method_type);
     const bool is_async = IsAsyncMethod(method_type);
-    if (is_generator || is_async || type == kAccessorProperty) {
+    if (is_generator || is_async || type == PropertyKind::kAccessorProperty) {
       MessageTemplate::Template msg =
           is_generator ? MessageTemplate::kConstructorIsGenerator
                        : is_async ? MessageTemplate::kConstructorIsAsync

src/parsing/parser.cc

@@ -4707,7 +4707,7 @@ Expression* Parser::ParseClassLiteral(ExpressionClassifier* classifier,
     ExpressionClassifier property_classifier(this);
     const AstRawString* property_name = nullptr;
     ObjectLiteral::Property* property = ParsePropertyDefinition(
-        &checker, in_class, has_extends, MethodKind::kNormal, &is_computed_name,
+        &checker, in_class, has_extends, &is_computed_name,
         &has_seen_constructor, &property_classifier, &property_name, CHECK_OK);
     RewriteNonPattern(&property_classifier, CHECK_OK);
     if (classifier != nullptr) {

src/parsing/preparser.cc

@@ -1184,9 +1184,9 @@ PreParserExpression PreParser::ParseClassLiteral(
                                     // property names here.
     Identifier name;
     ExpressionClassifier property_classifier(this);
-    ParsePropertyDefinition(
+    ParsePropertyDefinition(&checker, in_class, has_extends, &is_computed_name,
-        &checker, in_class, has_extends, MethodKind::kNormal, &is_computed_name,
+                            &has_seen_constructor, &property_classifier, &name,
-        &has_seen_constructor, &property_classifier, &name, CHECK_OK);
+                            CHECK_OK);
     ValidateExpression(&property_classifier, CHECK_OK);
     if (classifier != nullptr) {
       classifier->AccumulateFormalParameterContainmentErrors(

test/cctest/test-parsing.cc

@@ -2896,6 +2896,7 @@ TEST(StrictObjectLiteralChecking) {
 
 
 TEST(ErrorsObjectLiteralChecking) {
+  // clang-format off
   const char* context_data[][2] = {
     {"\"use strict\"; var myobject = {", "};"},
     {"var myobject = {", "};"},
@@ -2912,14 +2913,60 @@ TEST(ErrorsObjectLiteralChecking) {
     // Parsing FunctionLiteral for getter or setter fails
     "get foo( +",
     "get foo() \"error\"",
+    // Various forbidden forms
+    "static x: 0",
+    "static x(){}",
+    "static async x(){}",
+    "static get x(){}",
+    "static get x : 0",
+    "static x",
+    "static 0",
+    "*x: 0",
+    "*x",
+    "*get x(){}",
+    "*set x(y){}",
+    "get *x(){}",
+    "set *x(y){}",
+    "get x*(){}",
+    "set x*(y){}",
+    "x = 0",
+    "* *x(){}",
+    "x*(){}",
+    // This should fail without --harmony-async-await
+    "async x(){}",
     NULL
   };
+  // clang-format on
 
   RunParserSyncTest(context_data, statement_data, kError);
+
+  // clang-format off
+  const char* async_data[] = {
+    "static async x(){}",
+    "static async x : 0",
+    "static async get x : 0",
+    "async static x(){}",
+    "*async x(){}",
+    "async *x(){}",
+    "async x*(){}",
+    "async x : 0",
+    "async 0 : 0",
+    "async get x(){}",
+    "async get *x(){}",
+    "async set x(y){}",
+    "async get : 0",
+    NULL
+  };
+  // clang-format on
+
+  static const ParserFlag always_flags[] = {kAllowHarmonyAsyncAwait};
+  RunParserSyncTest(context_data, async_data, kError, NULL, 0, always_flags,
+                    arraysize(always_flags));
 }
 
 
 TEST(NoErrorsObjectLiteralChecking) {
+  // clang-format off
   const char* context_data[][2] = {
     {"var myobject = {", "};"},
     {"var myobject = {", ",};"},
@@ -2968,6 +3015,19 @@ TEST(NoErrorsObjectLiteralChecking) {
     "1: 1, set 2(v) {}",
     "get: 1, get foo() {}",
     "set: 1, set foo(_) {}",
+    // Potentially confusing cases
+    "get(){}",
+    "set(){}",
+    "static(){}",
+    "async(){}",
+    "*get() {}",
+    "*set() {}",
+    "*static() {}",
+    "*async(){}",
+    "get : 0",
+    "set : 0",
+    "static : 0",
+    "async : 0",
     // Keywords, future reserved and strict future reserved are also allowed as
     // property names.
     "if: 4",
@@ -2977,8 +3037,28 @@ TEST(NoErrorsObjectLiteralChecking) {
     "arguments: 8",
     NULL
   };
+  // clang-format on
 
   RunParserSyncTest(context_data, statement_data, kSuccess);
+
+  // clang-format off
+  const char* async_data[] = {
+    "async x(){}",
+    "async 0(){}",
+    "async get(){}",
+    "async set(){}",
+    "async static(){}",
+    "async async(){}",
+    "async : 0",
+    "async(){}",
+    "*async(){}",
+    NULL
+  };
+  // clang-format on
+
+  static const ParserFlag always_flags[] = {kAllowHarmonyAsyncAwait};
+  RunParserSyncTest(context_data, async_data, kSuccess, NULL, 0, always_flags,
+                    arraysize(always_flags));
 }
 
 
@@ -4394,6 +4474,10 @@ TEST(ClassBodyNoErrors) {
     "*get() {}",
     "*set() {}",
     "static *g() {}",
+    "async(){}",
+    "*async(){}",
+    "static async(){}",
+    "static *async(){}",
 
     // Escaped 'static' should be allowed anywhere
     // static-as-PropertyName is.
@@ -4409,6 +4493,27 @@ TEST(ClassBodyNoErrors) {
   // clang-format on
 
   RunParserSyncTest(context_data, class_body_data, kSuccess);
+
+  // clang-format off
+  const char* async_data[] = {
+    "static async x(){}",
+    "static async(){}",
+    "static *async(){}",
+    "async x(){}",
+    "async 0(){}",
+    "async get(){}",
+    "async set(){}",
+    "async static(){}",
+    "async async(){}",
+    "async(){}",
+    "*async(){}",
+    NULL
+  };
+  // clang-format on
+
+  static const ParserFlag always_flags[] = {kAllowHarmonyAsyncAwait};
+  RunParserSyncTest(context_data, async_data, kSuccess, NULL, 0, always_flags,
+                    arraysize(always_flags));
 }
 
 
@@ -4522,6 +4627,43 @@ TEST(ClassDeclarationErrors) {
   RunParserSyncTest(context_data, class_data, kError);
 }
 
+TEST(ClassAsyncErrors) {
+  // clang-format off
+  const char* context_data[][2] = {{"(class {", "});"},
+                                   {"(class extends Base {", "});"},
+                                   {"class C {", "}"},
+                                   {"class C extends Base {", "}"},
+                                   {NULL, NULL}};
+  const char* async_data[] = {
+    "*async x(){}",
+    "async *(){}",
+    "async *x(){}",
+    "async get x(){}",
+    "async set x(y){}",
+    "async x : 0",
+    "async : 0",
+
+    "async static x(){}",
+
+    "static *async x(){}",
+    "static async *(){}",
+    "static async *x(){}",
+    "static async get x(){}",
+    "static async set x(y){}",
+    "static async x : 0",
+    "static async : 0",
+    NULL
+  };
+  // clang-format on
+
+  // All of these are illegal whether or not async functions are permitted,
+  // although for different reasons.
+  RunParserSyncTest(context_data, async_data, kError);
+
+  static const ParserFlag always_flags[] = {kAllowHarmonyAsyncAwait};
+  RunParserSyncTest(context_data, async_data, kError, NULL, 0, always_flags,
+                    arraysize(always_flags));
+}
 
 TEST(ClassNameErrors) {
   const char* context_data[][2] = {{"class ", "{}"},

test/mjsunit/mjsunit.status

@@ -530,6 +530,12 @@
   'es6/collections': [PASS, ['arch == ia32', FAST_VARIANTS]],
 }],  # 'system == windows'
 
+##############################################################################
+['system == macos', {
+  # BUG(v8:5333)
+  'big-object-literal': [SKIP],
+}],  # 'system == macos'
+
 ##############################################################################
 ['arch == s390 or arch == s390x', {