Make built-ins strict mode conforming, and support a --use-strict flag.

src/regexp.js

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Expect $Object = global.Object;
 // Expect $Array = global.Array;
 
-const $RegExp = global.RegExp;
+var $RegExp = global.RegExp;
 
 // A recursive descent parser for Patterns according to the grammar of
 // ECMA-262 15.10.1, with deviations noted below.
 function DoConstructRegExp(object, pattern, flags) {
   // RegExp : Called as constructor; see ECMA-262, section 15.10.4.
   if (IS_REGEXP(pattern)) {
     if (!IS_UNDEFINED(flags)) {
       throw MakeTypeError('regexp_flags', []);
     }
     flags = (pattern.global ? 'g' : '')
@@ skipping 364 matching lines @@
     "toString", RegExpToString,
     "compile", RegExpCompile
   ));
 
   // The length of compile is 1 in SpiderMonkey.
   %FunctionSetLength($RegExp.prototype.compile, 1);
 
   // The properties input, $input, and $_ are aliases for each other.  When this
   // value is set the value it is set to is coerced to a string.
   // Getter and setter for the input.
-  function RegExpGetInput() {
+  var RegExpGetInput = function() {
     var regExpInput = LAST_INPUT(lastMatchInfo);
     return IS_UNDEFINED(regExpInput) ? "" : regExpInput;
-  }
-  function RegExpSetInput(string) {
+  };
+  var RegExpSetInput = function(string) {
     LAST_INPUT(lastMatchInfo) = ToString(string);
-  }
+  };
 
   %DefineAccessor($RegExp, 'input', GETTER, RegExpGetInput, DONT_DELETE);
   %DefineAccessor($RegExp, 'input', SETTER, RegExpSetInput, DONT_DELETE);
   %DefineAccessor($RegExp, '$_', GETTER, RegExpGetInput,
                   DONT_ENUM | DONT_DELETE);
   %DefineAccessor($RegExp, '$_', SETTER, RegExpSetInput,
                   DONT_ENUM | DONT_DELETE);
   %DefineAccessor($RegExp, '$input', GETTER, RegExpGetInput,
                   DONT_ENUM | DONT_DELETE);
   %DefineAccessor($RegExp, '$input', SETTER, RegExpSetInput,
                   DONT_ENUM | DONT_DELETE);
 
   // The properties multiline and $* are aliases for each other.  When this
   // value is set in SpiderMonkey, the value it is set to is coerced to a
   // boolean.  We mimic that behavior with a slight difference: in SpiderMonkey
   // the value of the expression 'RegExp.multiline = null' (for instance) is the
   // boolean false (i.e., the value after coercion), while in V8 it is the value
   // null (i.e., the value before coercion).
 
   // Getter and setter for multiline.
   var multiline = false;
-  function RegExpGetMultiline() { return multiline; }
-  function RegExpSetMultiline(flag) { multiline = flag ? true : false; }
+  var RegExpGetMultiline = function() { return multiline; };
+  var RegExpSetMultiline = function(flag) { multiline = flag ? true : false; };
 
   %DefineAccessor($RegExp, 'multiline', GETTER, RegExpGetMultiline,
                   DONT_DELETE);
   %DefineAccessor($RegExp, 'multiline', SETTER, RegExpSetMultiline,
                   DONT_DELETE);
   %DefineAccessor($RegExp, '$*', GETTER, RegExpGetMultiline,
                   DONT_ENUM | DONT_DELETE);
   %DefineAccessor($RegExp, '$*', SETTER, RegExpSetMultiline,
                   DONT_ENUM | DONT_DELETE);
 
 
-  function NoOpSetter(ignored) {}
+  var NoOpSetter = function(ignored) {};
 
 
   // Static properties set by a successful match.
   %DefineAccessor($RegExp, 'lastMatch', GETTER, RegExpGetLastMatch,
                   DONT_DELETE);
   %DefineAccessor($RegExp, 'lastMatch', SETTER, NoOpSetter, DONT_DELETE);
   %DefineAccessor($RegExp, '$&', GETTER, RegExpGetLastMatch,
                   DONT_ENUM | DONT_DELETE);
   %DefineAccessor($RegExp, '$&', SETTER, NoOpSetter, DONT_ENUM | DONT_DELETE);
   %DefineAccessor($RegExp, 'lastParen', GETTER, RegExpGetLastParen,
@@ skipping 16 matching lines @@
   %DefineAccessor($RegExp, "$'", SETTER, NoOpSetter, DONT_ENUM | DONT_DELETE);
 
   for (var i = 1; i < 10; ++i) {
     %DefineAccessor($RegExp, '$' + i, GETTER, RegExpMakeCaptureGetter(i),
                     DONT_DELETE);
     %DefineAccessor($RegExp, '$' + i, SETTER, NoOpSetter, DONT_DELETE);
   }
 }
 
 SetUpRegExp();