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
hash_value(BinaryOperationHint hint)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 kInternalizedString,
37 kString,
38 kReceiver,
39 kAny
40 };
41
hash_value(CompareOperationHint hint)42 inline size_t hash_value(CompareOperationHint hint) {
43 return static_cast<unsigned>(hint);
44 }
45
46 std::ostream& operator<<(std::ostream&, CompareOperationHint);
47
48 // Type hints for the ToBoolean type conversion.
49 enum class ToBooleanHint : uint16_t {
50 kNone = 0u,
51 kUndefined = 1u << 0,
52 kBoolean = 1u << 1,
53 kNull = 1u << 2,
54 kSmallInteger = 1u << 3,
55 kReceiver = 1u << 4,
56 kString = 1u << 5,
57 kSymbol = 1u << 6,
58 kHeapNumber = 1u << 7,
59 kAny = kUndefined | kBoolean | kNull | kSmallInteger | kReceiver | kString |
60 kSymbol | kHeapNumber,
61 kNeedsMap = kReceiver | kString | kSymbol | kHeapNumber,
62 kCanBeUndetectable = kReceiver,
63 };
64
65 std::ostream& operator<<(std::ostream&, ToBooleanHint);
66 std::string ToString(ToBooleanHint);
67
68 typedef base::Flags<ToBooleanHint, uint16_t> ToBooleanHints;
69
70 std::ostream& operator<<(std::ostream&, ToBooleanHints);
71 std::string ToString(ToBooleanHints);
72
73 DEFINE_OPERATORS_FOR_FLAGS(ToBooleanHints)
74
75 enum StringAddFlags {
76 // Omit both parameter checks.
77 STRING_ADD_CHECK_NONE = 0,
78 // Check left parameter.
79 STRING_ADD_CHECK_LEFT = 1 << 0,
80 // Check right parameter.
81 STRING_ADD_CHECK_RIGHT = 1 << 1,
82 // Check both parameters.
83 STRING_ADD_CHECK_BOTH = STRING_ADD_CHECK_LEFT | STRING_ADD_CHECK_RIGHT,
84 // Convert parameters when check fails (instead of throwing an exception).
85 STRING_ADD_CONVERT = 1 << 2,
86 STRING_ADD_CONVERT_LEFT = STRING_ADD_CHECK_LEFT | STRING_ADD_CONVERT,
87 STRING_ADD_CONVERT_RIGHT = STRING_ADD_CHECK_RIGHT | STRING_ADD_CONVERT
88 };
89
90 std::ostream& operator<<(std::ostream& os, const StringAddFlags& flags);
91
92 } // namespace internal
93 } // namespace v8
94
95 #endif // V8_TYPE_HINTS_H_
96