[regexp] Port RegExpConstructor to C++

src/js/regexp.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function(global, utils) {
 
 'use strict';
 
 %CheckIsBootstrapping();
 
@@ skipping 63 matching lines @@
 
 function PatternFlags(pattern) {
   return (REGEXP_GLOBAL(pattern) ? 'g' : '') +
          (REGEXP_IGNORE_CASE(pattern) ? 'i' : '') +
          (REGEXP_MULTILINE(pattern) ? 'm' : '') +
          (REGEXP_UNICODE(pattern) ? 'u' : '') +
          (REGEXP_STICKY(pattern) ? 'y' : '');
 }
 
 
-// ES#sec-regexp-pattern-flags
-// RegExp ( pattern, flags )
-function RegExpConstructor(pattern, flags) {
-  var newtarget = new.target;
-  var pattern_is_regexp = IsRegExp(pattern);
-
-  if (IS_UNDEFINED(newtarget)) {
-    newtarget = GlobalRegExp;
-
-    // ES6 section 21.2.3.1 step 3.b
-    if (pattern_is_regexp && IS_UNDEFINED(flags) &&
-        pattern.constructor === newtarget) {
-      return pattern;
-    }
-  }
-
-  if (IS_REGEXP(pattern)) {
-    if (IS_UNDEFINED(flags)) flags = PatternFlags(pattern);
-    pattern = REGEXP_SOURCE(pattern);
-
-  } else if (pattern_is_regexp) {
-    var input_pattern = pattern;
-    pattern = pattern.source;
-    if (IS_UNDEFINED(flags)) flags = input_pattern.flags;
-  }
-
-  var object = %_NewObject(GlobalRegExp, newtarget);
-  return RegExpInitialize(object, pattern, flags);
-}
-
-
 // ES#sec-regexp.prototype.compile RegExp.prototype.compile (pattern, flags)
 function RegExpCompileJS(pattern, flags) {
   if (!IS_REGEXP(this)) {
     throw %make_type_error(kIncompatibleMethodReceiver,
                         "RegExp.prototype.compile", this);
   }
 
   if (IS_REGEXP(pattern)) {
     if (!IS_UNDEFINED(flags)) throw %make_type_error(kRegExpFlags);
 
@@ skipping 841 matching lines @@
 %SetForceInlineFlag(RegExpGetUnicode);
 
 
 function RegExpSpecies() {
   return this;
 }
 
 
 // -------------------------------------------------------------------
 
-%FunctionSetInstanceClassName(GlobalRegExp, 'RegExp');
-%SetCode(GlobalRegExp, RegExpConstructor);
-
 utils.InstallGetter(GlobalRegExp, speciesSymbol, RegExpSpecies);
 
 utils.InstallFunctions(GlobalRegExp.prototype, DONT_ENUM, [
   "test", RegExpSubclassTest,
   "toString", RegExpToString,
   "compile", RegExpCompileJS,
   matchSymbol, RegExpSubclassMatch,
   replaceSymbol, RegExpSubclassReplace,
   searchSymbol, RegExpSubclassSearch,
   splitSymbol, RegExpSubclassSplit,
@@ skipping 94 matching lines @@
   to.GetSubstitution = GetSubstitution;
   to.InternalRegExpMatch = InternalRegExpMatch;
   to.InternalRegExpReplace = InternalRegExpReplace;
   to.IsRegExp = IsRegExp;
   to.RegExpExec = DoRegExpExec;
   to.RegExpInitialize = RegExpInitialize;
   to.RegExpLastMatchInfo = RegExpLastMatchInfo;
 });
 
 })