Implement code generation for === and !==.

frog/leg/lib/core.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 void print(var obj) {
   // TODO(ngeoffray): enable when the parser accepts it.
   // obj = obj.toString();
   var hasConsole = JS("bool", @"typeof console == 'object'");
   if (hasConsole) {
     JS("void", @"console.log($0)", obj);
@@ skipping 102 matching lines @@
       JS("bool", @"typeof $0 === 'number'", a) ||
       JS("bool", @"typeof $0 === 'boolean'", a) ||
       JS("bool", @"typeof $0 === 'string'", a)) {
     return JS("bool", @"$0 === $1", a, b);
   }
   // TODO(kasperl): This is not the right implementation if the a has
   // a user-defined == operator.
   return JS("bool", @"$0 === $1", a, b);
 }
 
+eqq(var a, var b) {

[ngeoffray, 2012/01/06 08:10:20]

Why this method if HIdentity always ends up being a builtin?

+  return JS("bool", @"$0 === $1", a, b);
+}
+
 gt(var a, var b) {
   if (checkNumbers(a, b, "num> expects a number as second operand.")) {
     return JS("bool", @"$0 > $1", a, b);
   }
   throw "Unimplemented user-defined binary >.";
 }
 
 ge(var a, var b) {
   if (checkNumbers(a, b, "num>= expects a number as second operand.")) {
     return JS("bool", @"$0 >= $1", a, b);
@@ skipping 195 matching lines @@
     } else {
       return
         JS("num", @"Math.floor($0 + (Date.now() - $1))", elapsedMs, startMs);
     }
   }
 
   int frequency() {
     return 1000;
   }
 }