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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_OBJECTS_H_ | 5 #ifndef V8_OBJECTS_H_ |
6 #define V8_OBJECTS_H_ | 6 #define V8_OBJECTS_H_ |
7 | 7 |
8 #include <iosfwd> | 8 #include <iosfwd> |
9 | 9 |
10 #include "src/allocation.h" | 10 #include "src/allocation.h" |
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8405 public: | 8405 public: |
8406 // [name]: The print name of a symbol, or undefined if none. | 8406 // [name]: The print name of a symbol, or undefined if none. |
8407 DECL_ACCESSORS(name, Object) | 8407 DECL_ACCESSORS(name, Object) |
8408 | 8408 |
8409 DECL_INT_ACCESSORS(flags) | 8409 DECL_INT_ACCESSORS(flags) |
8410 | 8410 |
8411 // [is_private]: Whether this is a private symbol. Private symbols can only | 8411 // [is_private]: Whether this is a private symbol. Private symbols can only |
8412 // be used to designate own properties of objects. | 8412 // be used to designate own properties of objects. |
8413 DECL_BOOLEAN_ACCESSORS(is_private) | 8413 DECL_BOOLEAN_ACCESSORS(is_private) |
8414 | 8414 |
| 8415 // [is_well_known_symbol]: Whether this is a spec-defined well-known symbol, |
| 8416 // or not. Well-known symbols do not throw when an access check fails during |
| 8417 // a load. |
| 8418 DECL_BOOLEAN_ACCESSORS(is_well_known_symbol) |
| 8419 |
8415 DECLARE_CAST(Symbol) | 8420 DECLARE_CAST(Symbol) |
8416 | 8421 |
8417 // Dispatched behavior. | 8422 // Dispatched behavior. |
8418 DECLARE_PRINTER(Symbol) | 8423 DECLARE_PRINTER(Symbol) |
8419 DECLARE_VERIFIER(Symbol) | 8424 DECLARE_VERIFIER(Symbol) |
8420 | 8425 |
8421 // Layout description. | 8426 // Layout description. |
8422 static const int kNameOffset = Name::kSize; | 8427 static const int kNameOffset = Name::kSize; |
8423 static const int kFlagsOffset = kNameOffset + kPointerSize; | 8428 static const int kFlagsOffset = kNameOffset + kPointerSize; |
8424 static const int kSize = kFlagsOffset + kPointerSize; | 8429 static const int kSize = kFlagsOffset + kPointerSize; |
8425 | 8430 |
8426 typedef FixedBodyDescriptor<kNameOffset, kFlagsOffset, kSize> BodyDescriptor; | 8431 typedef FixedBodyDescriptor<kNameOffset, kFlagsOffset, kSize> BodyDescriptor; |
8427 | 8432 |
8428 void SymbolShortPrint(std::ostream& os); | 8433 void SymbolShortPrint(std::ostream& os); |
8429 | 8434 |
8430 private: | 8435 private: |
8431 static const int kPrivateBit = 0; | 8436 static const int kPrivateBit = 0; |
| 8437 static const int kWellKnownSymbolBit = 1; |
8432 | 8438 |
8433 const char* PrivateSymbolToName() const; | 8439 const char* PrivateSymbolToName() const; |
8434 | 8440 |
8435 #if TRACE_MAPS | 8441 #if TRACE_MAPS |
8436 friend class Name; // For PrivateSymbolToName. | 8442 friend class Name; // For PrivateSymbolToName. |
8437 #endif | 8443 #endif |
8438 | 8444 |
8439 DISALLOW_IMPLICIT_CONSTRUCTORS(Symbol); | 8445 DISALLOW_IMPLICIT_CONSTRUCTORS(Symbol); |
8440 }; | 8446 }; |
8441 | 8447 |
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10664 Handle<FixedArray> keys_; | 10670 Handle<FixedArray> keys_; |
10665 Handle<OrderedHashSet> set_; | 10671 Handle<OrderedHashSet> set_; |
10666 int length_; | 10672 int length_; |
10667 DISALLOW_COPY_AND_ASSIGN(KeyAccumulator); | 10673 DISALLOW_COPY_AND_ASSIGN(KeyAccumulator); |
10668 }; | 10674 }; |
10669 | 10675 |
10670 } // NOLINT, false-positive due to second-order macros. | 10676 } // NOLINT, false-positive due to second-order macros. |
10671 } // NOLINT, false-positive due to second-order macros. | 10677 } // NOLINT, false-positive due to second-order macros. |
10672 | 10678 |
10673 #endif // V8_OBJECTS_H_ | 10679 #endif // V8_OBJECTS_H_ |
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