Bump to v4.3.0.

lodash.topath/index.js

@@ -1,18 +1,15 @@
 /**
- * lodash 4.2.0 (Custom Build) <https://lodash.com/>
+ * lodash 4.3.0 (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
- * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+ * Copyright jQuery Foundation and other contributors <https://jquery.org/>
+ * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <https://lodash.com/license>
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
-var toString = require('lodash.tostring');
+var stringToPath = require('lodash._stringtopath');
 
-/** Used to match property names within property paths. */
-var rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]/g;
-
-/** Used to match backslashes in property paths. */
-var reEscapeChar = /\\(\\)?/g;
+/** `Object#toString` result references. */
+var symbolTag = '[object Symbol]';
 
 /**
  * A specialized version of `_.map` for arrays without support for iteratee
@@ -34,19 +31,44 @@ function arrayMap(array, iteratee) {
   return result;
 }
 
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
 /**
- * Converts `string` to a property path array.
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+var objectToString = objectProto.toString;
+
+/**
+ * Copies the values of `source` to `array`.
  *
  * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the property path array.
+ * @param {Array} source The array to copy values from.
+ * @param {Array} [array=[]] The array to copy values to.
+ * @returns {Array} Returns `array`.
  */
-function stringToPath(string) {
-  var result = [];
-  toString(string).replace(rePropName, function(match, number, quote, string) {
-    result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
-  });
-  return result;
+function copyArray(source, array) {
+  var index = -1,
+      length = source.length;
+
+  array || (array = Array(length));
+  while (++index < length) {
+    array[index] = source[index];
+  }
+  return array;
+}
+
+/**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+function toKey(key) {
+  return (typeof key == 'string' || isSymbol(key)) ? key : (key + '');
 }
 
 /**
@@ -54,10 +76,12 @@ function stringToPath(string) {
  *
  * @static
  * @memberOf _
+ * @since 0.1.0
  * @type {Function}
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if `value` is correctly classified,
+ *  else `false`.
  * @example
  *
  * _.isArray([1, 2, 3]);
@@ -74,11 +98,63 @@ function stringToPath(string) {
  */
 var isArray = Array.isArray;
 
+/**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+function isObjectLike(value) {
+  return !!value && typeof value == 'object';
+}
+
+/**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is correctly classified,
+ *  else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+function isSymbol(value) {
+  return typeof value == 'symbol' ||
+    (isObjectLike(value) && objectToString.call(value) == symbolTag);
+}
+
 /**
  * Converts `value` to a property path array.
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @category Util
  * @param {*} value The value to convert.
  * @returns {Array} Returns the new property path array.
@@ -100,7 +176,10 @@ var isArray = Array.isArray;
  * // => false
  */
 function toPath(value) {
-  return isArray(value) ? arrayMap(value, String) : stringToPath(value);
+  if (isArray(value)) {
+    return arrayMap(value, toKey);
+  }
+  return isSymbol(value) ? [value] : copyArray(stringToPath(value));
 }
 
 module.exports = toPath;