Line data    Source code

       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           0 : inline size_t hash_value(BinaryOperationHint hint) {
      25           0 :   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             : 
      42      222450 : inline size_t hash_value(CompareOperationHint hint) {
      43      222450 :   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_