Rewriting Project

1 files changed, 87 insertions, 0 deletions

diff --git a/node_modules/core-js/internals/regexp-exec.js b/node_modules/core-js/internals/regexp-exec.js
new file mode 100644
index 0000000..1dee69f
--- /dev/null
+++ b/node_modules/core-js/internals/regexp-exec.js
@@ -0,0 +1,87 @@
+'use strict';
+var regexpFlags = require('./regexp-flags');
+var stickyHelpers = require('./regexp-sticky-helpers');
+
+var nativeExec = RegExp.prototype.exec;
+// This always refers to the native implementation, because the
+// String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,
+// which loads this file before patching the method.
+var nativeReplace = String.prototype.replace;
+
+var patchedExec = nativeExec;
+
+var UPDATES_LAST_INDEX_WRONG = (function () {
+  var re1 = /a/;
+  var re2 = /b*/g;
+  nativeExec.call(re1, 'a');
+  nativeExec.call(re2, 'a');
+  return re1.lastIndex !== 0 || re2.lastIndex !== 0;
+})();
+
+var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y || stickyHelpers.BROKEN_CARET;
+
+// nonparticipating capturing group, copied from es5-shim's String#split patch.
+var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
+
+var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y;
+
+if (PATCH) {
+  patchedExec = function exec(str) {
+    var re = this;
+    var lastIndex, reCopy, match, i;
+    var sticky = UNSUPPORTED_Y && re.sticky;
+    var flags = regexpFlags.call(re);
+    var source = re.source;
+    var charsAdded = 0;
+    var strCopy = str;
+
+    if (sticky) {
+      flags = flags.replace('y', '');
+      if (flags.indexOf('g') === -1) {
+        flags += 'g';
+      }
+
+      strCopy = String(str).slice(re.lastIndex);
+      // Support anchored sticky behavior.
+      if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\n')) {
+        source = '(?: ' + source + ')';
+        strCopy = ' ' + strCopy;
+        charsAdded++;
+      }
+      // ^(? + rx + ) is needed, in combination with some str slicing, to
+      // simulate the 'y' flag.
+      reCopy = new RegExp('^(?:' + source + ')', flags);
+    }
+
+    if (NPCG_INCLUDED) {
+      reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+    }
+    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
+
+    match = nativeExec.call(sticky ? reCopy : re, strCopy);
+
+    if (sticky) {
+      if (match) {
+        match.input = match.input.slice(charsAdded);
+        match[0] = match[0].slice(charsAdded);
+        match.index = re.lastIndex;
+        re.lastIndex += match[0].length;
+      } else re.lastIndex = 0;
+    } else if (UPDATES_LAST_INDEX_WRONG && match) {
+      re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
+    }
+    if (NPCG_INCLUDED && match && match.length > 1) {
+      // Fix browsers whose `exec` methods don't consistently return `undefined`
+      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
+      nativeReplace.call(match[0], reCopy, function () {
+        for (i = 1; i < arguments.length - 2; i++) {
+          if (arguments[i] === undefined) match[i] = undefined;
+        }
+      });
+    }
+
+    return match;
+  };
+}
+
+module.exports = patchedExec;