Bug 1114752 - Uplift Add-on SDK to Firefox a=me

addon-sdk/source/lib/sdk/util/sequence.js

@@ -1,7 +1,6 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/.
- */
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 "use strict";
 
 module.metadata = {
@@ -22,14 +21,15 @@ module.metadata = {
 // - `_` used for argument(s) or variable(s) who's values are ignored.
 
 const { complement, flip, identity } = require("../lang/functional");
-const { isArray, isArguments, isMap, isSet,
+const { isArray, isArguments, isMap, isSet, isGenerator,
         isString, isBoolean, isNumber } = require("../lang/type");
 
 const Sequence = function Sequence(iterator) {
-  if (iterator.isGenerator && iterator.isGenerator())
-    this[Symbol.iterator] = iterator;
-  else
+  if (!isGenerator(iterator)) {
     throw TypeError("Expected generator argument");
+  }
+
+  this[Symbol.iterator] = iterator;
 };
 exports.Sequence = Sequence;
 
@@ -61,9 +61,6 @@ const seq = polymorphic({
 });
 exports.seq = seq;
 
-
-
-
 // Function to cast seq to string.
 const string = (...etc) => "".concat(...etc);
 exports.string = string;
@@ -111,6 +108,27 @@ const pairs = polymorphic({
 });
 exports.pairs = pairs;
 
+const names = polymorphic({
+  null: empty,
+  void: empty,
+  default: object => seq(function*() {
+    for (let name of Object.getOwnPropertyNames(object)) {
+      yield name;
+    }
+  })
+});
+exports.names = names;
+
+const symbols = polymorphic({
+  null: empty,
+  void: empty,
+  default: object => seq(function* () {
+    for (let symbol of Object.getOwnPropertySymbols(object)) {
+      yield symbol;
+    }
+  })
+});
+exports.symbols = symbols;
 
 const keys = polymorphic({
   null: empty,