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 kAny
37 };
38
hash_value(CompareOperationHint hint)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