src/v8/src/accessors.h

   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
   3 // found in the LICENSE file.
   4
   5 #ifndef V8_ACCESSORS_H_
   6 #define V8_ACCESSORS_H_
   7
   8 #include "src/allocation.h"
   9 #include "src/globals.h"
  10
  11 namespace v8 {
  12 namespace internal {
  13
  14 // The list of accessor descriptors. This is a second-order macro
  15 // taking a macro to be applied to all accessor descriptor names.
  16 #define ACCESSOR_INFO_LIST(V)     \
  17   V(ArgumentsIterator)            \
  18   V(ArrayLength)                  \
  19   V(FunctionArguments)            \
  20   V(FunctionCaller)               \
  21   V(FunctionName)                 \
  22   V(FunctionLength)               \
  23   V(FunctionPrototype)            \
  24   V(ScriptColumnOffset)           \
  25   V(ScriptCompilationType)        \
  26   V(ScriptContextData)            \
  27   V(ScriptEvalFromScript)         \
  28   V(ScriptEvalFromScriptPosition) \
  29   V(ScriptEvalFromFunctionName)   \
  30   V(ScriptId)                     \
  31   V(ScriptLineEnds)               \
  32   V(ScriptLineOffset)             \
  33   V(ScriptName)                   \
  34   V(ScriptSource)                 \
  35   V(ScriptType)                   \
  36   V(ScriptSourceUrl)              \
  37   V(ScriptSourceMappingUrl)       \
  38   V(StringLength)
  39
  40 // Accessors contains all predefined proxy accessors.
  41
  42 class Accessors : public AllStatic {
  43  public:
  44   // Accessor descriptors.
  45 #define ACCESSOR_INFO_DECLARATION(name)                   \
  46   static void name##Getter(                               \
  47       v8::Local<v8::Name> name,                           \
  48       const v8::PropertyCallbackInfo<v8::Value>& info);   \
  49   static void name##Setter(                               \
  50       v8::Local<v8::Name> name,                           \
  51       v8::Local<v8::Value> value,                         \
  52       const v8::PropertyCallbackInfo<void>& info);   \
  53   static Handle<AccessorInfo> name##Info(                 \
  54       Isolate* isolate,                                   \
  55       PropertyAttributes attributes);
  56   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
  57 #undef ACCESSOR_INFO_DECLARATION
  58
  59   enum DescriptorId {
  60 #define ACCESSOR_INFO_DECLARATION(name) \
  61     k##name##Getter, \
  62     k##name##Setter,
  63   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
  64 #undef ACCESSOR_INFO_DECLARATION
  65     descriptorCount
  66   };
  67
  68   // Accessor functions called directly from the runtime system.
  69   MUST_USE_RESULT static MaybeHandle<Object> FunctionSetPrototype(
  70       Handle<JSFunction> object, Handle<Object> value);
  71   static Handle<Object> FunctionGetArguments(Handle<JSFunction> object);
  72
  73   // Accessor infos.
  74   static Handle<AccessorInfo> MakeModuleExport(
  75       Handle<String> name, int index, PropertyAttributes attributes);
  76
  77   // Returns true for properties that are accessors to object fields.
  78   // If true, *object_offset contains offset of object field.
  79   template <class T>
  80   static bool IsJSObjectFieldAccessor(typename T::TypeHandle type,
  81                                       Handle<Name> name,
  82                                       int* object_offset);
  83
  84   static Handle<AccessorInfo> MakeAccessor(
  85       Isolate* isolate,
  86       Handle<Name> name,
  87       AccessorNameGetterCallback getter,
  88       AccessorNameSetterCallback setter,
  89       PropertyAttributes attributes);
  90
  91   static Handle<ExecutableAccessorInfo> CloneAccessor(
  92       Isolate* isolate,
  93       Handle<ExecutableAccessorInfo> accessor);
  94
  95
  96  private:
  97   // Helper functions.
  98   static Handle<Object> FlattenNumber(Isolate* isolate, Handle<Object> value);
  99 };
 100
 101 } }  // namespace v8::internal
 102
 103 #endif  // V8_ACCESSORS_H_