Remove more dead code after Object.observe removal

src/js/v8natives.js

 // 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.
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
 // ----------------------------------------------------------------------------
 // Imports
@@ skipping 124 matching lines @@
   return %HasInPrototypeChain(V, O);
 }
 
 
 // ES6 19.1.3.4
 function ObjectPropertyIsEnumerable(V) {
   var P = TO_NAME(V);
   return %PropertyIsEnumerable(TO_OBJECT(this), P);
 }
 
-
-// Extensions for providing property getters and setters.
-function ObjectDefineGetter(name, fun) {
-  var receiver = this;
-  if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) {
-    receiver = %GlobalProxy(ObjectDefineGetter);
-  }
-  if (!IS_CALLABLE(fun)) {
-    throw MakeTypeError(kObjectGetterExpectingFunction);
-  }
-  var desc = new PropertyDescriptor();
-  desc.setGet(fun);
-  desc.setEnumerable(true);
-  desc.setConfigurable(true);
-  DefineOwnProperty(TO_OBJECT(receiver), TO_NAME(name), desc, false);
-}
-
-
-function ObjectLookupGetter(name) {
-  var receiver = this;
-  if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) {
-    receiver = %GlobalProxy(ObjectLookupGetter);
-  }
-  return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), GETTER);
-}
-
-
-function ObjectDefineSetter(name, fun) {
-  var receiver = this;
-  if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) {
-    receiver = %GlobalProxy(ObjectDefineSetter);
-  }
-  if (!IS_CALLABLE(fun)) {
-    throw MakeTypeError(kObjectSetterExpectingFunction);
-  }
-  var desc = new PropertyDescriptor();
-  desc.setSet(fun);
-  desc.setEnumerable(true);
-  desc.setConfigurable(true);
-  DefineOwnProperty(TO_OBJECT(receiver), TO_NAME(name), desc, false);
-}
-
-
-function ObjectLookupSetter(name) {
-  var receiver = this;
-  if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) {
-    receiver = %GlobalProxy(ObjectLookupSetter);
-  }
-  return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), SETTER);
-}
-
-
-// ES6 6.2.4.1
-function IsAccessorDescriptor(desc) {
-  if (IS_UNDEFINED(desc)) return false;
-  return desc.hasGetter() || desc.hasSetter();
-}
-
-
-// ES6 6.2.4.2
-function IsDataDescriptor(desc) {
-  if (IS_UNDEFINED(desc)) return false;
-  return desc.hasValue() || desc.hasWritable();
-}
-
-
-// ES6 6.2.4.3
-function IsGenericDescriptor(desc) {
-  if (IS_UNDEFINED(desc)) return false;
-  return !(IsAccessorDescriptor(desc) || IsDataDescriptor(desc));
-}
-
-
-function IsInconsistentDescriptor(desc) {
-  return IsAccessorDescriptor(desc) && IsDataDescriptor(desc);
-}
-
-
-// Harmony Proxies
-function FromGenericPropertyDescriptor(desc) {
-  if (IS_UNDEFINED(desc)) return desc;
-  var obj = new GlobalObject();
-
-  if (desc.hasValue()) {
-    %AddNamedProperty(obj, "value", desc.getValue(), NONE);
-  }
-  if (desc.hasWritable()) {
-    %AddNamedProperty(obj, "writable", desc.isWritable(), NONE);
-  }
-  if (desc.hasGetter()) {
-    %AddNamedProperty(obj, "get", desc.getGet(), NONE);
-  }
-  if (desc.hasSetter()) {
-    %AddNamedProperty(obj, "set", desc.getSet(), NONE);
-  }
-  if (desc.hasEnumerable()) {
-    %AddNamedProperty(obj, "enumerable", desc.isEnumerable(), NONE);
-  }
-  if (desc.hasConfigurable()) {
-    %AddNamedProperty(obj, "configurable", desc.isConfigurable(), NONE);
-  }
-  return obj;
-}
-
-
-// ES6 6.2.4.5
-function ToPropertyDescriptor(obj) {
-  if (!IS_RECEIVER(obj)) throw MakeTypeError(kPropertyDescObject, obj);
-
-  var desc = new PropertyDescriptor();
-
-  if ("enumerable" in obj) {
-    desc.setEnumerable(TO_BOOLEAN(obj.enumerable));
-  }
-
-  if ("configurable" in obj) {
-    desc.setConfigurable(TO_BOOLEAN(obj.configurable));
-  }
-
-  if ("value" in obj) {
-    desc.setValue(obj.value);
-  }
-
-  if ("writable" in obj) {
-    desc.setWritable(TO_BOOLEAN(obj.writable));
-  }
-
-  if ("get" in obj) {
-    var get = obj.get;
-    if (!IS_UNDEFINED(get) && !IS_CALLABLE(get)) {
-      throw MakeTypeError(kObjectGetterCallable, get);
-    }
-    desc.setGet(get);
-  }
-
-  if ("set" in obj) {
-    var set = obj.set;
-    if (!IS_UNDEFINED(set) && !IS_CALLABLE(set)) {
-      throw MakeTypeError(kObjectSetterCallable, set);
-    }
-    desc.setSet(set);
-  }
-
-  if (IsInconsistentDescriptor(desc)) {
-    throw MakeTypeError(kValueAndAccessor, obj);
-  }
-  return desc;
-}
-
-// TODO(cbruni): remove once callers have been removed
-function ToCompletePropertyDescriptor(obj) {
-  var desc = ToPropertyDescriptor(obj);
-  if (IsGenericDescriptor(desc) || IsDataDescriptor(desc)) {
-    if (!desc.hasValue()) desc.setValue(UNDEFINED);
-    if (!desc.hasWritable()) desc.setWritable(false);
-  } else {
-    // Is accessor descriptor.
-    if (!desc.hasGetter()) desc.setGet(UNDEFINED);
-    if (!desc.hasSetter()) desc.setSet(UNDEFINED);
-  }
-  if (!desc.hasEnumerable()) desc.setEnumerable(false);
-  if (!desc.hasConfigurable()) desc.setConfigurable(false);
-  return desc;
-}
-
-
-function PropertyDescriptor() {
-  // Initialize here so they are all in-object and have the same map.
-  // Default values from ES5 8.6.1.
-  this.value_ = UNDEFINED;
-  this.hasValue_ = false;
-  this.writable_ = false;
-  this.hasWritable_ = false;
-  this.enumerable_ = false;
-  this.hasEnumerable_ = false;
-  this.configurable_ = false;
-  this.hasConfigurable_ = false;
-  this.get_ = UNDEFINED;
-  this.hasGetter_ = false;
-  this.set_ = UNDEFINED;
-  this.hasSetter_ = false;
-}
-
-utils.SetUpLockedPrototype(PropertyDescriptor, [
-  "value_",
-  "hasValue_",
-  "writable_",
-  "hasWritable_",
-  "enumerable_",
-  "hasEnumerable_",
-  "configurable_",
-  "hasConfigurable_",
-  "get_",
-  "hasGetter_",
-  "set_",
-  "hasSetter_"
-], [
-  "toString", function PropertyDescriptor_ToString() {
-    return "[object PropertyDescriptor]";
-  },
-  "setValue", function PropertyDescriptor_SetValue(value) {
-    this.value_ = value;
-    this.hasValue_ = true;
-  },
-  "getValue", function PropertyDescriptor_GetValue() {
-    return this.value_;
-  },
-  "hasValue", function PropertyDescriptor_HasValue() {
-    return this.hasValue_;
-  },
-  "setEnumerable", function PropertyDescriptor_SetEnumerable(enumerable) {
-    this.enumerable_ = enumerable;
-      this.hasEnumerable_ = true;
-  },
-  "isEnumerable", function PropertyDescriptor_IsEnumerable() {
-    return this.enumerable_;
-  },
-  "hasEnumerable", function PropertyDescriptor_HasEnumerable() {
-    return this.hasEnumerable_;
-  },
-  "setWritable", function PropertyDescriptor_SetWritable(writable) {
-    this.writable_ = writable;
-    this.hasWritable_ = true;
-  },
-  "isWritable", function PropertyDescriptor_IsWritable() {
-    return this.writable_;
-  },
-  "hasWritable", function PropertyDescriptor_HasWritable() {
-    return this.hasWritable_;
-  },
-  "setConfigurable",
-  function PropertyDescriptor_SetConfigurable(configurable) {
-    this.configurable_ = configurable;
-    this.hasConfigurable_ = true;
-  },
-  "hasConfigurable", function PropertyDescriptor_HasConfigurable() {
-    return this.hasConfigurable_;
-  },
-  "isConfigurable", function PropertyDescriptor_IsConfigurable() {
-    return this.configurable_;
-  },
-  "setGet", function PropertyDescriptor_SetGetter(get) {
-    this.get_ = get;
-    this.hasGetter_ = true;
-  },
-  "getGet", function PropertyDescriptor_GetGetter() {
-    return this.get_;
-  },
-  "hasGetter", function PropertyDescriptor_HasGetter() {
-    return this.hasGetter_;
-  },
-  "setSet", function PropertyDescriptor_SetSetter(set) {
-    this.set_ = set;
-    this.hasSetter_ = true;
-  },
-  "getSet", function PropertyDescriptor_GetSetter() {
-    return this.set_;
-  },
-  "hasSetter", function PropertyDescriptor_HasSetter() {
-    return this.hasSetter_;
-  }
-]);
-
-
-// Converts an array returned from Runtime_GetOwnProperty to an actual
-// property descriptor. For a description of the array layout please
-// see the runtime.cc file.
-function ConvertDescriptorArrayToDescriptor(desc_array) {
-  if (IS_UNDEFINED(desc_array)) {
-    return UNDEFINED;
-  }
-
-  var desc = new PropertyDescriptor();
-  // This is an accessor.
-  if (desc_array[IS_ACCESSOR_INDEX]) {
-    desc.setGet(desc_array[GETTER_INDEX]);
-    desc.setSet(desc_array[SETTER_INDEX]);
-  } else {
-    desc.setValue(desc_array[VALUE_INDEX]);
-    desc.setWritable(desc_array[WRITABLE_INDEX]);
-  }
-  desc.setEnumerable(desc_array[ENUMERABLE_INDEX]);
-  desc.setConfigurable(desc_array[CONFIGURABLE_INDEX]);
-
-  return desc;
-}
-
-
-// For Harmony proxies.
-function GetTrap(handler, name, defaultTrap) {
-  var trap = handler[name];
-  if (IS_UNDEFINED(trap)) {
-    if (IS_UNDEFINED(defaultTrap)) {
-      throw MakeTypeError(kIllegalInvocation);
-    }
-    trap = defaultTrap;
-  } else if (!IS_CALLABLE(trap)) {
-    throw MakeTypeError(kIllegalInvocation);
-  }
-  return trap;
-}
-
-
-function CallTrap1(handler, name, defaultTrap, x) {
-  return %_Call(GetTrap(handler, name, defaultTrap), handler, x);
-}
-
-
-function CallTrap2(handler, name, defaultTrap, x, y) {
-  return %_Call(GetTrap(handler, name, defaultTrap), handler, x, y);
-}
-
-
-// ES5 section 8.12.1.
-// TODO(jkummerow): Deprecated. Migrate all callers to
-// ObjectGetOwnPropertyDescriptor and delete this.
-function GetOwnPropertyJS(obj, v) {
-  var p = TO_NAME(v);
-  if (IS_PROXY(obj)) {
-    // TODO(rossberg): adjust once there is a story for symbols vs proxies.
-    if (IS_SYMBOL(v)) return UNDEFINED;
-
-    var handler = %JSProxyGetHandler(obj);
-    var descriptor = CallTrap1(
-                         handler, "getOwnPropertyDescriptor", UNDEFINED, p);
-    if (IS_UNDEFINED(descriptor)) return descriptor;
-    var desc = ToCompletePropertyDescriptor(descriptor);
-    if (!desc.isConfigurable()) {
-      throw MakeTypeError(kIllegalInvocation);
-    }
-    return desc;
-  }
-
-  // GetOwnProperty returns an array indexed by the constants
-  // defined in macros.py.
-  // If p is not a property on obj undefined is returned.
-  var props = %GetOwnProperty_Legacy(TO_OBJECT(obj), p);
-
-  return ConvertDescriptorArrayToDescriptor(props);
-}
-
-
 // ES6 7.3.9
 function GetMethod(obj, p) {
   var func = obj[p];
   if (IS_NULL_OR_UNDEFINED(func)) return UNDEFINED;
   if (IS_CALLABLE(func)) return func;
   throw MakeTypeError(kCalledNonCallable, typeof func);
 }
 
-
-// Harmony proxies.
-function DefineProxyProperty(obj, p, attributes, should_throw) {
-  // TODO(rossberg): adjust once there is a story for symbols vs proxies.
-  if (IS_SYMBOL(p)) return false;
-
-  var handler = %JSProxyGetHandler(obj);
-  var result = CallTrap2(handler, "defineProperty", UNDEFINED, p, attributes);
-  if (!result) {
-    if (should_throw) {
-      throw MakeTypeError(kIllegalInvocation);
-    } else {
-      return false;
-    }
-  }
-  return true;
-}
-
-
-// ES6 9.1.6 [[DefineOwnProperty]](P, Desc)
-function DefineObjectProperty(obj, p, desc, should_throw) {
-  var current_array = %GetOwnProperty_Legacy(obj, TO_NAME(p));
-  var current = ConvertDescriptorArrayToDescriptor(current_array);
-  var extensible = %object_is_extensible(obj);
-
-  if (IS_UNDEFINED(current) && !extensible) {
-    if (should_throw) {
-      throw MakeTypeError(kDefineDisallowed, p);
-    } else {
-      return false;
-    }
-  }
-
-  if (!IS_UNDEFINED(current)) {
-    if ((IsGenericDescriptor(desc) ||
-         IsDataDescriptor(desc) == IsDataDescriptor(current)) &&
-        (!desc.hasEnumerable() ||
-         %SameValue(desc.isEnumerable(), current.isEnumerable())) &&
-        (!desc.hasConfigurable() ||
-         %SameValue(desc.isConfigurable(), current.isConfigurable())) &&
-        (!desc.hasWritable() ||
-         %SameValue(desc.isWritable(), current.isWritable())) &&
-        (!desc.hasValue() ||
-         %SameValue(desc.getValue(), current.getValue())) &&
-        (!desc.hasGetter() ||
-         %SameValue(desc.getGet(), current.getGet())) &&
-        (!desc.hasSetter() ||
-         %SameValue(desc.getSet(), current.getSet()))) {
-      return true;
-    }
-    if (!current.isConfigurable()) {
-      // Step 7
-      if (desc.isConfigurable() ||
-          (desc.hasEnumerable() &&
-           desc.isEnumerable() != current.isEnumerable())) {
-        if (should_throw) {
-          throw MakeTypeError(kRedefineDisallowed, p);
-        } else {
-          return false;
-        }
-      }
-      // Step 8
-      if (!IsGenericDescriptor(desc)) {
-        // Step 9a
-        if (IsDataDescriptor(current) != IsDataDescriptor(desc)) {
-          if (should_throw) {
-            throw MakeTypeError(kRedefineDisallowed, p);
-          } else {
-            return false;
-          }
-        }
-        // Step 10a
-        if (IsDataDescriptor(current) && IsDataDescriptor(desc)) {
-          var currentIsWritable = current.isWritable();
-          if (currentIsWritable != desc.isWritable()) {
-            if (!currentIsWritable) {
-              if (should_throw) {
-                throw MakeTypeError(kRedefineDisallowed, p);
-              } else {
-                return false;
-              }
-            }
-          }
-          if (!currentIsWritable && desc.hasValue() &&
-              !%SameValue(desc.getValue(), current.getValue())) {
-            if (should_throw) {
-              throw MakeTypeError(kRedefineDisallowed, p);
-            } else {
-              return false;
-            }
-          }
-        }
-        // Step 11
-        if (IsAccessorDescriptor(desc) && IsAccessorDescriptor(current)) {
-          if (desc.hasSetter() &&
-              !%SameValue(desc.getSet(), current.getSet())) {
-            if (should_throw) {
-              throw MakeTypeError(kRedefineDisallowed, p);
-            } else {
-              return false;
-            }
-          }
-          if (desc.hasGetter() && !%SameValue(desc.getGet(),current.getGet())) {
-            if (should_throw) {
-              throw MakeTypeError(kRedefineDisallowed, p);
-            } else {
-              return false;
-            }
-          }
-        }
-      }
-    }
-  }
-
-  // Send flags - enumerable and configurable are common - writable is
-  // only send to the data descriptor.
-  // Take special care if enumerable and configurable is not defined on
-  // desc (we need to preserve the existing values from current).
-  var flag = NONE;
-  if (desc.hasEnumerable()) {
-    flag |= desc.isEnumerable() ? 0 : DONT_ENUM;
-  } else if (!IS_UNDEFINED(current)) {
-    flag |= current.isEnumerable() ? 0 : DONT_ENUM;
-  } else {
-    flag |= DONT_ENUM;
-  }
-
-  if (desc.hasConfigurable()) {
-    flag |= desc.isConfigurable() ? 0 : DONT_DELETE;
-  } else if (!IS_UNDEFINED(current)) {
-    flag |= current.isConfigurable() ? 0 : DONT_DELETE;
-  } else
-    flag |= DONT_DELETE;
-
-  if (IsDataDescriptor(desc) ||
-      (IsGenericDescriptor(desc) &&
-       (IS_UNDEFINED(current) || IsDataDescriptor(current)))) {
-    // There are 3 cases that lead here:
-    // Step 4a - defining a new data property.
-    // Steps 9b & 12 - replacing an existing accessor property with a data
-    //                 property.
-    // Step 12 - updating an existing data property with a data or generic
-    //           descriptor.
-
-    if (desc.hasWritable()) {
-      flag |= desc.isWritable() ? 0 : READ_ONLY;
-    } else if (!IS_UNDEFINED(current)) {
-      flag |= current.isWritable() ? 0 : READ_ONLY;
-    } else {
-      flag |= READ_ONLY;
-    }
-
-    var value = UNDEFINED;  // Default value is undefined.
-    if (desc.hasValue()) {
-      value = desc.getValue();
-    } else if (!IS_UNDEFINED(current) && IsDataDescriptor(current)) {
-      value = current.getValue();
-    }
-
-    %DefineDataPropertyUnchecked(obj, p, value, flag);
-  } else {
-    // There are 3 cases that lead here:
-    // Step 4b - defining a new accessor property.
-    // Steps 9c & 12 - replacing an existing data property with an accessor
-    //                 property.
-    // Step 12 - updating an existing accessor property with an accessor
-    //           descriptor.
-    var getter = null;
-    if (desc.hasGetter()) {
-      getter = desc.getGet();
-    } else if (IsAccessorDescriptor(current) && current.hasGetter()) {
-      getter = current.getGet();
-    }
-    var setter = null;
-    if (desc.hasSetter()) {
-      setter = desc.getSet();
-    } else if (IsAccessorDescriptor(current) && current.hasSetter()) {
-      setter = current.getSet();
-    }
-    %DefineAccessorPropertyUnchecked(obj, p, getter, setter, flag);
-  }
-  return true;
-}
-
-
-// ES5 section 15.4.5.1.
-function DefineArrayProperty(obj, p, desc, should_throw) {
-  // Step 3 - Special handling for array index.
-  if (!IS_SYMBOL(p)) {
-    var index = TO_UINT32(p);
-    if (TO_STRING(index) == p && index != 4294967295) {
-      var length = obj.length;
-      var length_desc = GetOwnPropertyJS(obj, "length");
-      if ((index >= length && !length_desc.isWritable()) ||
-          !DefineObjectProperty(obj, p, desc, true)) {
-        if (should_throw) {
-          throw MakeTypeError(kDefineDisallowed, p);
-        } else {
-          return false;
-        }
-      }
-      if (index >= length) {
-        obj.length = index + 1;
-      }
-      return true;
-    }
-  }
-
-  // Step 5 - Fallback to default implementation.
-  return DefineObjectProperty(obj, p, desc, should_throw);
-}
-
-
-// ES5 section 8.12.9, ES5 section 15.4.5.1 and Harmony proxies.
-function DefineOwnProperty(obj, p, desc, should_throw) {
-  if (IS_PROXY(obj)) {
-    // TODO(rossberg): adjust once there is a story for symbols vs proxies.
-    if (IS_SYMBOL(p)) return false;
-
-    var attributes = FromGenericPropertyDescriptor(desc);
-    return DefineProxyProperty(obj, p, attributes, should_throw);
-  } else if (IS_ARRAY(obj)) {
-    return DefineArrayProperty(obj, p, desc, should_throw);
-  } else {
-    return DefineObjectProperty(obj, p, desc, should_throw);
-  }
-}
-
-
 // ES6 section 19.1.2.9
 function ObjectGetPrototypeOf(obj) {
   return %_GetPrototype(TO_OBJECT(obj));
 }
 
 // ES6 section 19.1.2.18.
 function ObjectSetPrototypeOf(obj, proto) {
   CHECK_OBJECT_COERCIBLE(obj, "Object.setPrototypeOf");
 
   if (proto !== null && !IS_RECEIVER(proto)) {
     throw MakeTypeError(kProtoObjectOrNull, proto);
   }
 
   if (IS_RECEIVER(obj)) {
     %SetPrototype(obj, proto);
   }
 
   return obj;
 }
 
 
 // ES5 section 15.2.3.6.
 function ObjectDefineProperty(obj, p, attributes) {
-  // The new pure-C++ implementation doesn't support O.o.
-  // TODO(jkummerow): Implement missing features and remove fallback path.
   return %ObjectDefineProperty(obj, p, attributes);
 }
 
 
 // ES5 section 15.2.3.7.
 function ObjectDefineProperties(obj, properties) {
-  // The new pure-C++ implementation doesn't support O.o.
-  // TODO(jkummerow): Implement missing features and remove fallback path.
   return %ObjectDefineProperties(obj, properties);
 }
 
 
 // ES6 B.2.2.1.1
 function ObjectGetProto() {
   return %_GetPrototype(TO_OBJECT(this));
 }
 
 
@@ skipping 26 matching lines @@
 %AddNamedProperty(GlobalObject.prototype, "constructor", GlobalObject,
                   DONT_ENUM);
 
 // Set up non-enumerable functions on the Object.prototype object.
 utils.InstallFunctions(GlobalObject.prototype, DONT_ENUM, [
   "toString", ObjectToString,
   "toLocaleString", ObjectToLocaleString,
   "valueOf", ObjectValueOf,
   "isPrototypeOf", ObjectIsPrototypeOf,
   "propertyIsEnumerable", ObjectPropertyIsEnumerable,
-  "__defineGetter__", ObjectDefineGetter,
-  "__lookupGetter__", ObjectLookupGetter,
-  "__defineSetter__", ObjectDefineSetter,
-  "__lookupSetter__", ObjectLookupSetter
+  // __defineGetter__ is added in bootstrapper.cc.
+  // __lookupGetter__ is added in bootstrapper.cc.
+  // __defineSetter__ is added in bootstrapper.cc.
+  // __lookupSetter__ is added in bootstrapper.cc.
 ]);
 utils.InstallGetterSetter(GlobalObject.prototype, "__proto__", ObjectGetProto,
                     ObjectSetProto);
 
 // Set up non-enumerable functions in the Object object.
 utils.InstallFunctions(GlobalObject, DONT_ENUM, [
   // assign is added in bootstrapper.cc.
   // keys is added in bootstrapper.cc.
   "defineProperty", ObjectDefineProperty,
   "defineProperties", ObjectDefineProperties,
@@ skipping 238 matching lines @@
   to.ObjectDefineProperties = ObjectDefineProperties;
   to.ObjectDefineProperty = ObjectDefineProperty;
   to.ObjectHasOwnProperty = GlobalObject.prototype.hasOwnProperty;
 });
 
 %InstallToContext([
   "object_value_of", ObjectValueOf,
 ]);
 
 })