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1 files changed, 68 insertions, 0 deletions

diff --git a/node_modules/regex-cache/index.js b/node_modules/regex-cache/index.js
new file mode 100644
index 00000000..df8c4231
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+++ b/node_modules/regex-cache/index.js
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+/*!
+ * regex-cache <https://github.com/jonschlinkert/regex-cache>
+ *
+ * Copyright (c) 2015-2017, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+var equal = require('is-equal-shallow');
+var basic = {};
+var cache = {};
+
+/**
+ * Expose `regexCache`
+ */
+
+module.exports = regexCache;
+
+/**
+ * Memoize the results of a call to the new RegExp constructor.
+ *
+ * @param  {Function} fn [description]
+ * @param  {String} str [description]
+ * @param  {Options} options [description]
+ * @param  {Boolean} nocompare [description]
+ * @return {RegExp}
+ */
+
+function regexCache(fn, str, opts) {
+  var key = '_default_', regex, cached;
+
+  if (!str && !opts) {
+    if (typeof fn !== 'function') {
+      return fn;
+    }
+    return basic[key] || (basic[key] = fn(str));
+  }
+
+  var isString = typeof str === 'string';
+  if (isString) {
+    if (!opts) {
+      return basic[str] || (basic[str] = fn(str));
+    }
+    key = str;
+  } else {
+    opts = str;
+  }
+
+  cached = cache[key];
+  if (cached && equal(cached.opts, opts)) {
+    return cached.regex;
+  }
+
+  memo(key, opts, (regex = fn(str, opts)));
+  return regex;
+}
+
+function memo(key, opts, regex) {
+  cache[key] = {regex: regex, opts: opts};
+}
+
+/**
+ * Expose `cache`
+ */
+
+module.exports.cache = cache;
+module.exports.basic = basic;