first commit

build/node_modules/prepack/lib/intrinsics/node/utils.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; /**
+                                                                                                                                                                                                                                                                               * Copyright (c) 2017-present, Facebook, Inc.
+                                                                                                                                                                                                                                                                               * All rights reserved.
+                                                                                                                                                                                                                                                                               *
+                                                                                                                                                                                                                                                                               * This source code is licensed under the BSD-style license found in the
+                                                                                                                                                                                                                                                                               * LICENSE file in the root directory of this source tree. An additional grant
+                                                                                                                                                                                                                                                                               * of patent rights can be found in the PATENTS file in the same directory.
+                                                                                                                                                                                                                                                                               */
+
+exports.getNodeBufferFromTypedArray = getNodeBufferFromTypedArray;
+exports.createDeepIntrinsic = createDeepIntrinsic;
+exports.copyProperty = copyProperty;
+
+var _invariant = require("../../invariant.js");
+
+var _invariant2 = _interopRequireDefault(_invariant);
+
+var _errors = require("../../errors.js");
+
+var _index = require("../../values/index.js");
+
+var _singletons = require("../../singletons.js");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function getNodeBufferFromTypedArray(realm, value) {
+  var buffer = value.$ViewedArrayBuffer;
+  (0, _invariant2.default)(buffer instanceof _index.ObjectValue && buffer.$ArrayBufferData);
+  return buffer.$ArrayBufferData;
+}
+
+// Takes a value from the host realm and create it into a Prepack Realm.
+// TODO: Move this to a bigger general purpose proxy between the environments.
+// See issue #644 for more details.
+function createDeepIntrinsic(realm, value, intrinsicName) {
+  switch (typeof value === "undefined" ? "undefined" : _typeof(value)) {
+    case "undefined":
+      return realm.intrinsics.undefined;
+    case "boolean":
+      return new _index.BooleanValue(realm, value, intrinsicName);
+    case "number":
+      return new _index.NumberValue(realm, value, intrinsicName);
+    case "string":
+      return new _index.StringValue(realm, value, intrinsicName);
+    // $FlowFixMe flow doesn't understand symbols.
+    case "symbol":
+      throw new _errors.FatalError("Symbol cannot be safely cloned.");
+    case "function":
+      throw new _errors.FatalError("Functions could be supported but are not yet.");
+    case "object":
+      {
+        if (value === null) {
+          return realm.intrinsics.null;
+        }
+        if (Array.isArray(value)) {
+          throw new _errors.FatalError("Arrays are not supported yet.");
+        }
+        var prototype = Object.getPrototypeOf(value);
+        if (prototype !== Object.prototype) {
+          throw new _errors.FatalError("Only simple objects are supported for now. Got: " + (typeof prototype.constructor === "function" && prototype.constructor.name || Object.prototype.toString.call(prototype)));
+        }
+        var obj = new _index.ObjectValue(realm, realm.intrinsics.ObjectPrototype, intrinsicName // We use the intrinsic name for Objects to preserve their referential equality
+        );
+        var names = Object.getOwnPropertyNames(value);
+        var _iteratorNormalCompletion = true;
+        var _didIteratorError = false;
+        var _iteratorError = undefined;
+
+        try {
+          for (var _iterator = names[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+            var name = _step.value;
+
+            // We intentionally invoke the getter on value[name] which resolves any
+            // lazy getters.
+            var newValue = createDeepIntrinsic(realm, value[name], intrinsicName + "." + name);
+            copyProperty(realm, value, obj, name, newValue);
+          }
+        } catch (err) {
+          _didIteratorError = true;
+          _iteratorError = err;
+        } finally {
+          try {
+            if (!_iteratorNormalCompletion && _iterator.return) {
+              _iterator.return();
+            }
+          } finally {
+            if (_didIteratorError) {
+              throw _iteratorError;
+            }
+          }
+        }
+
+        return obj;
+      }
+    default:
+      (0, _invariant2.default)(false);
+  }
+}
+
+// Define a value with the same descriptor settings as the original object.
+function copyProperty(realm, originalObject, realmObject, name, value) {
+  var desc = Object.getOwnPropertyDescriptor(originalObject, name);
+  if (!desc) {
+    return;
+  }
+  if (desc.get || desc.set) {
+    throw new _errors.FatalError("Getter/setters are not supported because functions are not supported yet.");
+  }
+  var newDesc = {
+    value: value,
+    writable: !!desc.writable,
+    configurable: !!desc.configurable,
+    enumerable: !!desc.enumerable
+  };
+  _singletons.Properties.DefinePropertyOrThrow(realm, realmObject, name, newDesc);
+}
+//# sourceMappingURL=utils.js.map