OLD | NEW |
---|---|
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_GLOBALS_H_ | 5 #ifndef V8_GLOBALS_H_ |
6 #define V8_GLOBALS_H_ | 6 #define V8_GLOBALS_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
(...skipping 781 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
792 (static_cast<uint64_t>(kHoleNanUpper32) << 32) | kHoleNanLower32; | 792 (static_cast<uint64_t>(kHoleNanUpper32) << 32) | kHoleNanLower32; |
793 | 793 |
794 | 794 |
795 // ES6 section 20.1.2.6 Number.MAX_SAFE_INTEGER | 795 // ES6 section 20.1.2.6 Number.MAX_SAFE_INTEGER |
796 const double kMaxSafeInteger = 9007199254740991.0; // 2^53-1 | 796 const double kMaxSafeInteger = 9007199254740991.0; // 2^53-1 |
797 | 797 |
798 | 798 |
799 // The order of this enum has to be kept in sync with the predicates below. | 799 // The order of this enum has to be kept in sync with the predicates below. |
800 enum VariableMode { | 800 enum VariableMode { |
801 // User declared variables: | 801 // User declared variables: |
802 VAR, // declared via 'var', and 'function' declarations | 802 VAR, // declared via 'var', and 'function' declarations |
Michael Starzinger
2016/04/18 22:49:16
Sometimes clang-format is working against us, but
| |
803 | 803 |
804 CONST_LEGACY, // declared via legacy 'const' declarations | 804 CONST_LEGACY, // declared via legacy 'const' declarations |
805 | 805 |
806 LET, // declared via 'let' declarations (first lexical) | 806 LET, // declared via 'let' declarations (first lexical) |
807 | 807 |
808 CONST, // declared via 'const' declarations | 808 CONST, // declared via 'const' declarations (last lexical) |
809 | |
810 IMPORT, // declared via 'import' declarations (last lexical) | |
811 | 809 |
812 // Variables introduced by the compiler: | 810 // Variables introduced by the compiler: |
813 TEMPORARY, // temporary variables (not user-visible), stack-allocated | 811 TEMPORARY, // temporary variables (not user-visible), stack-allocated |
814 // unless the scope as a whole has forced context allocation | 812 // unless the scope as a whole has forced context allocation |
815 | 813 |
816 DYNAMIC, // always require dynamic lookup (we don't know | 814 DYNAMIC, // always require dynamic lookup (we don't know |
817 // the declaration) | 815 // the declaration) |
818 | 816 |
819 DYNAMIC_GLOBAL, // requires dynamic lookup, but we know that the | 817 DYNAMIC_GLOBAL, // requires dynamic lookup, but we know that the |
820 // variable is global unless it has been shadowed | 818 // variable is global unless it has been shadowed |
821 // by an eval-introduced variable | 819 // by an eval-introduced variable |
822 | 820 |
823 DYNAMIC_LOCAL // requires dynamic lookup, but we know that the | 821 DYNAMIC_LOCAL // requires dynamic lookup, but we know that the |
824 // variable is local and where it is unless it | 822 // variable is local and where it is unless it |
825 // has been shadowed by an eval-introduced | 823 // has been shadowed by an eval-introduced |
826 // variable | 824 // variable |
827 }; | 825 }; |
828 | 826 |
829 | |
830 inline bool IsDynamicVariableMode(VariableMode mode) { | 827 inline bool IsDynamicVariableMode(VariableMode mode) { |
831 return mode >= DYNAMIC && mode <= DYNAMIC_LOCAL; | 828 return mode >= DYNAMIC && mode <= DYNAMIC_LOCAL; |
832 } | 829 } |
833 | 830 |
834 | 831 |
835 inline bool IsDeclaredVariableMode(VariableMode mode) { | 832 inline bool IsDeclaredVariableMode(VariableMode mode) { |
836 return mode >= VAR && mode <= IMPORT; | 833 return mode >= VAR && mode <= CONST; |
837 } | 834 } |
838 | 835 |
839 | 836 |
840 inline bool IsLexicalVariableMode(VariableMode mode) { | 837 inline bool IsLexicalVariableMode(VariableMode mode) { |
841 return mode >= LET && mode <= IMPORT; | 838 return mode >= LET && mode <= CONST; |
842 } | 839 } |
843 | 840 |
844 | 841 |
845 inline bool IsImmutableVariableMode(VariableMode mode) { | 842 inline bool IsImmutableVariableMode(VariableMode mode) { |
846 return mode == CONST || mode == CONST_LEGACY || mode == IMPORT; | 843 return mode == CONST || mode == CONST_LEGACY; |
847 } | 844 } |
848 | 845 |
849 | 846 |
850 enum class VariableLocation { | 847 enum class VariableLocation { |
851 // Before and during variable allocation, a variable whose location is | 848 // Before and during variable allocation, a variable whose location is |
852 // not yet determined. After allocation, a variable looked up as a | 849 // not yet determined. After allocation, a variable looked up as a |
853 // property on the global object (and possibly absent). name() is the | 850 // property on the global object (and possibly absent). name() is the |
854 // variable name, index() is invalid. | 851 // variable name, index() is invalid. |
855 UNALLOCATED, | 852 UNALLOCATED, |
856 | 853 |
(...skipping 182 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
1039 return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >> | 1036 return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >> |
1040 kPointerSizeLog2); | 1037 kPointerSizeLog2); |
1041 } | 1038 } |
1042 | 1039 |
1043 } // namespace internal | 1040 } // namespace internal |
1044 } // namespace v8 | 1041 } // namespace v8 |
1045 | 1042 |
1046 namespace i = v8::internal; | 1043 namespace i = v8::internal; |
1047 | 1044 |
1048 #endif // V8_GLOBALS_H_ | 1045 #endif // V8_GLOBALS_H_ |
OLD | NEW |