Use GetProperty for getting elements.

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1188 matching lines @@
   MUST_USE_RESULT static MaybeHandle<Object> SetPropertyWithDefinedSetter(
       Handle<Object> receiver,
       Handle<JSReceiver> setter,
       Handle<Object> value);
 
   MUST_USE_RESULT static inline MaybeHandle<Object> GetElement(
       Isolate* isolate,
       Handle<Object> object,
       uint32_t index);
 
-  MUST_USE_RESULT static MaybeHandle<Object> GetElementWithReceiver(
-      Isolate* isolate,
-      Handle<Object> object,
-      Handle<Object> receiver,
-      uint32_t index);
-
   MUST_USE_RESULT static MaybeHandle<Object> SetElementWithReceiver(
       Isolate* isolate, Handle<Object> object, Handle<Object> receiver,
       uint32_t index, Handle<Object> value, LanguageMode language_mode);
 
   static inline Handle<Object> GetPrototypeSkipHiddenPrototypes(
       Isolate* isolate, Handle<Object> receiver);
 
   // Returns the permanent hash code associated with this object. May return
   // undefined if not yet created.
   Object* GetHash();
 
   // Returns the permanent hash code associated with this object depending on
   // the actual object type. May create and store a hash code if needed and none
   // exists.
   static Handle<Smi> GetOrCreateHash(Isolate* isolate, Handle<Object> object);
 
   // Checks whether this object has the same value as the given one.  This
   // function is implemented according to ES5, section 9.12 and can be used
   // to implement the Harmony "egal" function.
   bool SameValue(Object* other);
 
   // Checks whether this object has the same value as the given one.
   // +0 and -0 are treated equal. Everything else is the same as SameValue.
   // This function is implemented according to ES6, section 7.2.4 and is used
   // by ES6 Map and Set.
   bool SameValueZero(Object* other);
 
-  // Tries to convert an object to an array index.  Returns true and sets
-  // the output parameter if it succeeds.
+  // Tries to convert an object to an array length. Returns true and sets the
+  // output parameter if it succeeds.
+  inline bool ToArrayLength(uint32_t* index);
+
+  // Tries to convert an object to an array index. Returns true and sets the
+  // output parameter if it succeeds. Equivalent to ToArrayLength, but does not
+  // allow kMaxUInt32.
   inline bool ToArrayIndex(uint32_t* index);
 
   // Returns true if this is a JSValue containing a string and the index is
   // < the length of the string.  Used to implement [] on strings.
   inline bool IsStringObjectWithCharacterAt(uint32_t index);
 
   DECLARE_VERIFIER(Object)
 #ifdef VERIFY_HEAP
   // Verify a pointer is a valid object pointer.
   static void VerifyPointer(Object* p);
@@ skipping 726 matching lines @@
   MUST_USE_RESULT static MaybeHandle<Object> SetOwnElement(
       Handle<JSObject> object, uint32_t index, Handle<Object> value,
       PropertyAttributes attributes, LanguageMode language_mode);
 
   // Empty handle is returned if the element cannot be set to the given value.
   MUST_USE_RESULT static MaybeHandle<Object> SetElement(
       Handle<JSObject> object, uint32_t index, Handle<Object> value,
       PropertyAttributes attributes, LanguageMode language_mode,
       bool check_prototype = true, SetPropertyMode set_mode = SET_PROPERTY);
 
-  // Returns the index'th element.
-  // The undefined object if index is out of bounds.
-  MUST_USE_RESULT static MaybeHandle<Object> GetElementWithInterceptor(
-      Handle<JSObject> object, Handle<Object> receiver, uint32_t index,
-      bool check_prototype);
-
   enum SetFastElementsCapacitySmiMode {
     kAllowSmiElements,
     kForceSmiElements,
     kDontAllowSmiElements
   };
 
   static Handle<FixedArray> SetFastElementsCapacity(
       Handle<JSObject> object, int capacity,
       SetFastElementsCapacitySmiMode smi_mode);
   static Handle<FixedArrayBase> SetFastDoubleElementsCapacity(
@@ skipping 275 matching lines @@
                                 Handle<Map> new_map,
                                 int expected_additional_properties);
 
   static void UpdateAllocationSite(Handle<JSObject> object,
                                    ElementsKind to_kind);
 
   // Used from Object::GetProperty().
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithFailedAccessCheck(
       LookupIterator* it);
 
-  MUST_USE_RESULT static MaybeHandle<Object> GetElementWithCallback(
-      Handle<JSObject> object,
-      Handle<Object> receiver,
-      Handle<Object> structure,
-      uint32_t index,
-      Handle<Object> holder);
-
   MUST_USE_RESULT static Maybe<PropertyAttributes>
       GetElementAttributeWithInterceptor(Handle<JSObject> object,
                                          Handle<JSReceiver> receiver,
                                          uint32_t index, bool continue_search);
 
   // Queries indexed interceptor on an object for property attributes.
   //
   // We determine property attributes as follows:
   // - if interceptor has a query callback, then the  property attributes are
   //   the result of query callback for index.
@@ skipping 28 matching lines @@
   static MaybeHandle<Object> SetElementWithCallbackSetterInPrototypes(
       Handle<JSObject> object, uint32_t index, Handle<Object> value,
       bool* found, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> SetDictionaryElement(
       Handle<JSObject> object, uint32_t index, Handle<Object> value,
       PropertyAttributes attributes, LanguageMode language_mode,
       bool check_prototype, SetPropertyMode set_mode = SET_PROPERTY);
   MUST_USE_RESULT static MaybeHandle<Object> SetFastDoubleElement(
       Handle<JSObject> object, uint32_t index, Handle<Object> value,
       LanguageMode language_mode, bool check_prototype = true);
-  MUST_USE_RESULT static MaybeHandle<Object> GetElementWithFailedAccessCheck(
-      Isolate* isolate, Handle<JSObject> object, Handle<Object> receiver,
-      uint32_t index);
   MUST_USE_RESULT static Maybe<PropertyAttributes>
   GetElementAttributesWithFailedAccessCheck(Isolate* isolate,
                                             Handle<JSObject> object,
                                             Handle<Object> receiver,
                                             uint32_t index);
 
   MUST_USE_RESULT static MaybeHandle<Object> SetPropertyWithFailedAccessCheck(
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode);
 
   // Add a property to a slow-case object.
@@ skipping 7599 matching lines @@
 
   // [hash]: The hash code property (undefined if not initialized yet).
   DECL_ACCESSORS(hash, Object)
 
   DECLARE_CAST(JSProxy)
 
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithHandler(
       Handle<JSProxy> proxy,
       Handle<Object> receiver,
       Handle<Name> name);
-  MUST_USE_RESULT static inline MaybeHandle<Object> GetElementWithHandler(
-      Handle<JSProxy> proxy,
-      Handle<Object> receiver,
-      uint32_t index);
 
   // If the handler defines an accessor property with a setter, invoke it.
   // If it defines an accessor property without a setter, or a data property
   // that is read-only, throw. In all these cases set '*done' to true,
   // otherwise set it to false.
   MUST_USE_RESULT
   static MaybeHandle<Object> SetPropertyViaPrototypesWithHandler(
       Handle<JSProxy> proxy, Handle<Object> receiver, Handle<Name> name,
       Handle<Object> value, LanguageMode language_mode, bool* done);
 
@@ skipping 373 matching lines @@
 #endif
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSArrayBufferView);
 };
 
 
 class JSTypedArray: public JSArrayBufferView {
  public:
   // [length]: length of typed array in elements.
   DECL_ACCESSORS(length, Object)
+  inline uint32_t length_value() const;
 
   DECLARE_CAST(JSTypedArray)
 
   ExternalArrayType type();
   size_t element_size();
 
   Handle<JSArrayBuffer> GetBuffer();
 
   // Dispatched behavior.
   DECLARE_PRINTER(JSTypedArray)
@@ skipping 771 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_