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

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = SuperProperty;
+
+var _environment = require("../environment.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 }; }
+
+/**
+ * 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 MakeSuperPropertyReference(realm, propertyKey, strict) {
+  // 1. Let env be GetThisEnvironment( ).
+  var env = _singletons.Environment.GetThisEnvironment(realm);
+  (0, _invariant2.default)(env instanceof _environment.FunctionEnvironmentRecord);
+
+  // 2. If env.HasSuperBinding() is false, throw a ReferenceError exception.
+  if (!env.HasSuperBinding()) {
+    throw realm.createErrorThrowCompletion(realm.intrinsics.ReferenceError, "env does not have super binding");
+  }
+
+  // 3. Let actualThis be env.GetThisBinding().
+  var actualThis = env.GetThisBinding();
+
+  // 4. ReturnIfAbrupt(actualThis).
+
+  // 5. Let baseValue be env.GetSuperBase().
+  var baseValue = env.GetSuperBase();
+
+  // 6. Let bv be RequireObjectCoercible(baseValue).
+  var bv = (0, _index2.RequireObjectCoercible)(realm, baseValue);
+
+  // 7. ReturnIfAbrupt(bv).
+
+  // 8. Return a value of type Reference that is a Super Reference whose base value is bv, whose referenced name is propertyKey, whose thisValue is actualThis, and whose strict reference flag is strict.
+  return new _environment.Reference(bv, propertyKey, strict, actualThis);
+}
+
+// ECMA262 12.3.5.1
+function SuperProperty(ast, strictCode, env, realm) {
+  // SuperProperty : super [ Expression ]
+  if (ast.computed) {
+    // 1. Let propertyNameReference be the result of evaluating Expression.
+    var propertyNameReference = env.evaluate(ast.property, strictCode);
+
+    // 2. Let propertyNameValue be GetValue(propertyNameReference).
+    var propertyNameValue = _singletons.Environment.GetValue(realm, propertyNameReference);
+
+    // 3. Let propertyKey be ToPropertyKey(propertyNameValue).
+    var propertyKey = _singletons.To.ToPropertyKeyPartial(realm, propertyNameValue);
+
+    // 4. ReturnIfAbrupt(propertyKey).
+
+    // 5. If the code matched by the syntactic production that is being evaluated is strict mode code, let strict be true, else let strict be false.
+    var strict = strictCode;
+
+    // 6. Return MakeSuperPropertyReference(propertyKey, strict).
+    return MakeSuperPropertyReference(realm, propertyKey, strict);
+  } else {
+    // SuperProperty : super . IdentifierName
+    // 1. Let propertyKey be StringValue of IdentifierName.
+    var _propertyKey = new _index.StringValue(realm, ast.property.name);
+
+    // 2. If the code matched by the syntactic production that is being evaluated is strict mode code, let strict be true, else let strict be false.
+    var _strict = strictCode;
+
+    // 3. Return MakeSuperPropertyReference(propertyKey, strict).
+    return MakeSuperPropertyReference(realm, _propertyKey, _strict);
+  }
+}
+//# sourceMappingURL=SuperProperty.js.map