[es6] implement RegExp.@@search.

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) {
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
 var FLAG_harmony_tolength;
 var GlobalObject = global.Object;
 var GlobalRegExp = global.RegExp;
 var InternalArray = utils.InternalArray;
 var InternalPackedArray = utils.InternalPackedArray;
 var MakeTypeError;
 var matchSymbol = utils.ImportNow("match_symbol");
+var searchSymbol = utils.ImportNow("search_symbol");
 var splitSymbol = utils.ImportNow("split_symbol");
 
 utils.ImportFromExperimental(function(from) {
   FLAG_harmony_tolength = from.FLAG_harmony_tolength;
 });
 
 utils.Import(function(from) {
   MakeTypeError = from.MakeTypeError;
 });
 
@@ skipping 81 matching lines @@
 
     flags = PatternFlags(pattern);
     pattern = REGEXP_SOURCE(pattern);
   }
 
   return RegExpInitialize(this, pattern, flags);
 }
 
 
 function DoRegExpExec(regexp, string, index) {
-  var result = %_RegExpExec(regexp, string, index, RegExpLastMatchInfo);
-  return result;
+  return %_RegExpExec(regexp, string, index, RegExpLastMatchInfo);
 }
 
 
 // This is kind of performance sensitive, so we want to avoid unnecessary
 // type checks on inputs. But we also don't want to inline it several times
 // manually, so we use a macro :-)
 macro RETURN_NEW_RESULT_FROM_MATCH_INFO(MATCHINFO, STRING)
   var numResults = NUMBER_OF_CAPTURES(MATCHINFO) >> 1;
   var start = MATCHINFO[CAPTURE0];
   var end = MATCHINFO[CAPTURE1];
@@ skipping 218 matching lines @@
   }
 
   var array_result = [];
   %MoveArrayContents(result, array_result);
   return array_result;
 }
 
 
 // ES6 21.2.5.6.
 function RegExpMatch(string) {
+  // TODO(yangguo): allow non-regexp receivers.
   if (!IS_REGEXP(this)) {
     throw MakeTypeError(kIncompatibleMethodReceiver,
                         "RegExp.prototype.@@match", this);
   }
   var subject = TO_STRING(string);
 
   if (!REGEXP_GLOBAL(this)) return RegExpExecNoTests(this, subject, 0);
   this.lastIndex = 0;
   var result = %StringMatch(subject, this, RegExpLastMatchInfo);
   return result;
 }
 
 
+// ES6 21.2.5.9.
+function RegExpSearch(string) {
+  // TODO(yangguo): allow non-regexp receivers.
+  if (!IS_REGEXP(this)) {
+    throw MakeTypeError(kIncompatibleMethodReceiver,
+                        "RegExp.prototype.@@search", this);
+  }
+  var match = DoRegExpExec(this, TO_STRING(string), 0);
+  if (match) return match[CAPTURE0];
+  return -1;
+}
+
+
 // Getters for the static properties lastMatch, lastParen, leftContext, and
 // rightContext of the RegExp constructor.  The properties are computed based
 // on the captures array of the last successful match and the subject string
 // of the last successful match.
 function RegExpGetLastMatch() {
   var regExpSubject = LAST_SUBJECT(RegExpLastMatchInfo);
   return %_SubString(regExpSubject,
                      RegExpLastMatchInfo[CAPTURE0],
                      RegExpLastMatchInfo[CAPTURE1]);
 }
@@ skipping 98 matching lines @@
 %AddNamedProperty(
     GlobalRegExp.prototype, 'constructor', GlobalRegExp, DONT_ENUM);
 %SetCode(GlobalRegExp, RegExpConstructor);
 
 utils.InstallFunctions(GlobalRegExp.prototype, DONT_ENUM, [
   "exec", RegExpExecJS,
   "test", RegExpTest,
   "toString", RegExpToString,
   "compile", RegExpCompileJS,
   matchSymbol, RegExpMatch,
+  searchSymbol, RegExpSearch,
   splitSymbol, RegExpSplit,
 ]);
 
 utils.InstallGetter(GlobalRegExp.prototype, 'global', RegExpGetGlobal);
 utils.InstallGetter(GlobalRegExp.prototype, 'ignoreCase', RegExpGetIgnoreCase);
 utils.InstallGetter(GlobalRegExp.prototype, 'multiline', RegExpGetMultiline);
 utils.InstallGetter(GlobalRegExp.prototype, 'source', RegExpGetSource);
 
 // The length of compile is 1 in SpiderMonkey.
 %FunctionSetLength(GlobalRegExp.prototype.compile, 1);
@@ skipping 47 matching lines @@
 // Exports
 
 utils.Export(function(to) {
   to.RegExpExec = DoRegExpExec;
   to.RegExpExecNoTests = RegExpExecNoTests;
   to.RegExpLastMatchInfo = RegExpLastMatchInfo;
   to.RegExpTest = RegExpTest;
 });
 
 })