Polyfll named groups in RegExp#@@replace

client/core.js

@@ -1795,15 +1795,13 @@ var SPECIES = wks('species');
 
 module.exports = function (KEY, length, exec) {
   var SYMBOL = wks(KEY);
-  var fns = exec(defined, SYMBOL, ''[KEY]);
-  var strfn = fns[0];
-  var rxfn = fns[1];
-  if (fails(function () {
+
+  var delegates = !fails(function () {
     // String methods call symbol-named RegEp methods
     var O = {};
     O[SYMBOL] = function () { return 7; };
     return ''[KEY](O) != 7;
-  }) || fails(function () {
+  }) && !fails(function () {
     // Symbol-named RegExp methods call .exec
     var execCalled = false;
     var re = /a/;
@@ -1816,7 +1814,29 @@ module.exports = function (KEY, length, exec) {
     }
     re[SYMBOL]('');
     return !execCalled;
-  })) {
+  });
+
+  var replaceSupportsNamedGroups = KEY === 'replace' && !fails(function () {
+    // #replace needs built-in support for named groups.
+    // #match works fine because it just return the exec results, even if it has
+    // a "grops" property.
+    var re = /./;
+    re.exec = function () {
+      var result = [];
+      result.groups = { a: '7' };
+      return result;
+    };
+    return ''.replace(re, '$<a>') !== '7';
+  });
+
+  if (!delegates || (KEY === 'replace' && !replaceSupportsNamedGroups)) {
+    var fns = exec(defined, SYMBOL, ''[KEY], /./[SYMBOL], {
+      delegates: delegates,
+      replaceSupportsNamedGroups: replaceSupportsNamedGroups
+    });
+    var strfn = fns[0];
+    var rxfn = fns[1];
+
     redefine(String.prototype, KEY, strfn);
     redefine(RegExp.prototype, SYMBOL, length == 2
       // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)
@@ -6174,7 +6194,7 @@ var maybeToString = function (it) {
 };
 
 // @@replace logic
-__webpack_require__(62)('replace', 2, function (defined, REPLACE, $replace) {
+__webpack_require__(62)('replace', 2, function (defined, REPLACE, $replace, RegExp$replace, reason) {
   return [
     // `String.prototype.replace` method
     // https://tc39.github.io/ecma262/#sec-string.prototype.replace
@@ -6188,7 +6208,16 @@ __webpack_require__(62)('replace', 2, function (defined, REPLACE, $replace) {
     // `RegExp.prototype[@@replace]` method
     // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace
     function (regexp, replaceValue) {
-      if (regexp.exec === nativeExec) return $replace.call(this, regexp, replaceValue);
+      if (regexp.exec === nativeExec) {
+        if (reason.delegates) {
+          // The native #replaceMethod already delegates to @@replace (this
+          // polyfilled function, leasing to infinite recursion).
+          // We avoid it by directly calling the native @@replace method.
+          return RegExp$replace.call(regexp, this, replaceValue);
+        }
+        return $replace.call(this, regexp, replaceValue);
+      }
+
       var rx = anObject(regexp);
       var S = String(this);
       var functionalReplace = typeof replaceValue === 'function';