1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_TYPE_HINTS_H_ 6 #define V8_TYPE_HINTS_H_ 7 8 #include "src/base/flags.h" 9 #include "src/utils.h" 10 11 namespace v8 { 12 namespace internal { 13 14 // Type hints for an binary operation. 15 enum class BinaryOperationHint : uint8_t { 16 kNone, 17 kSignedSmall, 18 kSigned32, 19 kNumberOrOddball, 20 kString, 21 kAny 22 }; 23 24 inline size_t hash_value(BinaryOperationHint hint) { 25 return static_cast<unsigned>(hint); 26 } 27 28 std::ostream& operator<<(std::ostream&, BinaryOperationHint); 29 30 // Type hints for an compare operation. 31 enum class CompareOperationHint : uint8_t { 32 kNone, 33 kSignedSmall, 34 kNumber, 35 kNumberOrOddball, 36 kAny 37 }; 38 39 inline size_t hash_value(CompareOperationHint hint) { 40 return static_cast<unsigned>(hint); 41 } 42 43 std::ostream& operator<<(std::ostream&, CompareOperationHint); 44 45 // Type hints for the ToBoolean type conversion. 46 enum class ToBooleanHint : uint16_t { 47 kNone = 0u, 48 kUndefined = 1u << 0, 49 kBoolean = 1u << 1, 50 kNull = 1u << 2, 51 kSmallInteger = 1u << 3, 52 kReceiver = 1u << 4, 53 kString = 1u << 5, 54 kSymbol = 1u << 6, 55 kHeapNumber = 1u << 7, 56 kSimdValue = 1u << 8, 57 kAny = kUndefined | kBoolean | kNull | kSmallInteger | kReceiver | kString | 58 kSymbol | kHeapNumber | kSimdValue, 59 kNeedsMap = kReceiver | kString | kSymbol | kHeapNumber | kSimdValue, 60 kCanBeUndetectable = kReceiver, 61 }; 62 63 std::ostream& operator<<(std::ostream&, ToBooleanHint); 64 65 typedef base::Flags<ToBooleanHint, uint16_t> ToBooleanHints; 66 67 std::ostream& operator<<(std::ostream&, ToBooleanHints); 68 69 DEFINE_OPERATORS_FOR_FLAGS(ToBooleanHints) 70 71 enum StringAddFlags { 72 // Omit both parameter checks. 73 STRING_ADD_CHECK_NONE = 0, 74 // Check left parameter. 75 STRING_ADD_CHECK_LEFT = 1 << 0, 76 // Check right parameter. 77 STRING_ADD_CHECK_RIGHT = 1 << 1, 78 // Check both parameters. 79 STRING_ADD_CHECK_BOTH = STRING_ADD_CHECK_LEFT | STRING_ADD_CHECK_RIGHT, 80 // Convert parameters when check fails (instead of throwing an exception). 81 STRING_ADD_CONVERT = 1 << 2, 82 STRING_ADD_CONVERT_LEFT = STRING_ADD_CHECK_LEFT | STRING_ADD_CONVERT, 83 STRING_ADD_CONVERT_RIGHT = STRING_ADD_CHECK_RIGHT | STRING_ADD_CONVERT 84 }; 85 86 std::ostream& operator<<(std::ostream& os, const StringAddFlags& flags); 87 88 } // namespace internal 89 } // namespace v8 90 91 #endif // V8_TYPE_HINTS_H_ 92
