first commit

build/node_modules/prepack/lib/evaluators/ObjectExpression.js

@@ -0,0 +1,139 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.EvalPropertyName = EvalPropertyName;
+
+exports.default = function (ast, strictCode, env, realm) {
+  // 1. Let obj be ObjectCreate(%ObjectPrototype%).
+  var obj = _singletons.Create.ObjectCreate(realm, realm.intrinsics.ObjectPrototype);
+
+  // 2. Let status be the result of performing PropertyDefinitionEvaluation of PropertyDefinitionList with arguments obj and true.
+  var _iteratorNormalCompletion = true;
+  var _didIteratorError = false;
+  var _iteratorError = undefined;
+
+  try {
+    for (var _iterator = ast.properties[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+      var prop = _step.value;
+
+      if (prop.type === "ObjectProperty") {
+        // 12.2.6.9 case 3
+        // 1. Let propKey be the result of evaluating PropertyName.
+        var propKey = EvalPropertyNamePartial(prop, env, realm, strictCode);
+
+        // 2. ReturnIfAbrupt(propKey).
+
+        // 3. Let exprValueRef be the result of evaluating AssignmentExpression.
+        var exprValueRef = env.evaluate(prop.value, strictCode);
+
+        // 4. Let propValue be ? GetValue(exprValueRef).
+        var propValue = _singletons.Environment.GetValue(realm, exprValueRef);
+
+        // 5. If IsAnonymousFunctionDefinition(AssignmentExpression) is true, then
+        if ((0, _index2.IsAnonymousFunctionDefinition)(realm, prop.value)) {
+          (0, _invariant2.default)(propValue instanceof _index.ObjectValue);
+
+          // a. Let hasNameProperty be ? HasOwnProperty(propValue, "name").
+          var hasNameProperty = (0, _index2.HasOwnProperty)(realm, propValue, "name");
+
+          // b. If hasNameProperty is false, perform SetFunctionName(propValue, propKey).
+          (0, _invariant2.default)(!hasNameProperty); // No expression that passes through IsAnonymousFunctionDefinition can have it here
+          _singletons.Functions.SetFunctionName(realm, propValue, propKey);
+        }
+
+        // 6. Assert: enumerable is true.
+
+        // 7. Return CreateDataPropertyOrThrow(object, propKey, propValue).
+        if (propKey instanceof _index.AbstractValue) {
+          if (propKey.mightNotBeString()) {
+            var error = new _errors.CompilerDiagnostic("property key value is unknown", prop.loc, "PP0011", "FatalError");
+            if (realm.handleError(error) === "Fail") throw new _errors.FatalError();
+            continue; // recover by ignoring the property, which is only ever safe to do if the property is dead,
+            // which is assuming a bit much, hence the designation as a FatalError.
+          }
+          obj.$SetPartial(propKey, propValue, obj);
+        } else {
+          _singletons.Create.CreateDataPropertyOrThrow(realm, obj, propKey, propValue);
+        }
+      } else {
+        (0, _invariant2.default)(prop.type === "ObjectMethod");
+        _singletons.Properties.PropertyDefinitionEvaluation(realm, prop, obj, env, strictCode, true);
+      }
+    }
+
+    // 3. ReturnIfAbrupt(status).
+
+    // 4. Return obj.
+  } catch (err) {
+    _didIteratorError = true;
+    _iteratorError = err;
+  } finally {
+    try {
+      if (!_iteratorNormalCompletion && _iterator.return) {
+        _iterator.return();
+      }
+    } finally {
+      if (_didIteratorError) {
+        throw _iteratorError;
+      }
+    }
+  }
+
+  return obj;
+};
+
+var _errors = require("../errors.js");
+
+var _index = require("../values/index.js");
+
+var _index2 = require("../methods/index.js");
+
+var _singletons = require("../singletons.js");
+
+var _invariant = require("../invariant.js");
+
+var _invariant2 = _interopRequireDefault(_invariant);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+// Returns the result of evaluating PropertyName.
+/**
+ * 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.
+ */
+
+function EvalPropertyName(prop, env, realm, strictCode) {
+  var result = EvalPropertyNamePartial(prop, env, realm, strictCode);
+  if (result instanceof _index.AbstractValue) {
+    var error = new _errors.CompilerDiagnostic("unknown computed property name", prop.loc, "PP0014", "FatalError");
+    realm.handleError(error);
+    throw new _errors.FatalError();
+  }
+  return result;
+}
+
+function EvalPropertyNamePartial(prop, env, realm, strictCode) {
+  if (prop.computed) {
+    var propertyKeyName = _singletons.Environment.GetValue(realm, env.evaluate(prop.key, strictCode));
+    if (propertyKeyName instanceof _index.AbstractValue) return propertyKeyName;
+    (0, _invariant2.default)(propertyKeyName instanceof _index.ConcreteValue);
+    return _singletons.To.ToPropertyKey(realm, propertyKeyName);
+  } else {
+    if (prop.key.type === "Identifier") {
+      return new _index.StringValue(realm, prop.key.name);
+    } else {
+      var _propertyKeyName = _singletons.Environment.GetValue(realm, env.evaluate(prop.key, strictCode));
+      (0, _invariant2.default)(_propertyKeyName instanceof _index.ConcreteValue); // syntax only allows literals if !prop.computed
+      return _singletons.To.ToString(realm, _propertyKeyName);
+    }
+  }
+}
+
+// ECMA262 12.2.6.8
+//# sourceMappingURL=ObjectExpression.js.map