*** __builtin__.java.old	Thu Dec 30 18:30:08 2004
--- __builtin__.java	Thu Dec 30 18:30:26 2004
***************
*** 43,52 ****
--- 43,54 ----
              return __builtin__.list(arg1);
          case 8:
              return __builtin__.tuple(arg1);
          case 11:
              return Py.newInteger(__builtin__.id(arg1));
+         case 12:
+             return __builtin__.sum(arg1);
          default:
              throw argCountError(1);
          }
      }
  
***************
*** 60,69 ****
--- 62,73 ----
              return Py.newInteger(__builtin__.cmp(arg1, arg2));
          case 9:
              return __builtin__.apply(arg1, arg2);
          case 10:
              return Py.newBoolean(__builtin__.isinstance(arg1, arg2));
+         case 12:
+             return __builtin__.sum(arg1, arg2);
          default:
              throw argCountError(2);
          }
      }
  
***************
*** 136,145 ****
--- 140,150 ----
          dict.__setitem__("tuple", new BuiltinFunctions("tuple", 8, 1));
          dict.__setitem__("apply", new BuiltinFunctions("apply", 9, 2, 3));
          dict.__setitem__("isinstance",
                                    new BuiltinFunctions("isinstance", 10, 2));
          dict.__setitem__("id", new BuiltinFunctions("id", 11, 1));
+         dict.__setitem__("sum", new BuiltinFunctions("sum", 12, 1, 2));
          dict.__setitem__("__import__", new ImportFunction());
  
          dict.__delitem__("execfile_flags"); // -execfile_flags
      }
  
***************
*** 864,873 ****
--- 869,908 ----
  
      public static PyString str(PyObject o) {
          return o.__str__();
      }
  
+     public static PyObject sum(PyObject seq, PyObject result) {
+         PyObject temp;
+         PyObject item;
+         PyObject iter;
+         
+         if(result == null) {
+             result = new PyInteger(0);
+         }
+         else {
+             if(result instanceof PyString)
+                 throw Py.TypeError("sum() can't sum strings [use ''.join(seq) instead]");
+         }
+         
+         iter = seq.__iter__();
+         for(;;) {
+             item = iter.__iternext__();
+             if(item == null)
+                 break;
+             temp = result._add(item);
+             result = temp;
+             if(result == null)
+                 break;
+         }
+         return result;
+     }
+     
+     public static PyObject sum(PyObject seq) {
+         return sum(seq, null);
+     }
+     
      public static PyString unicode(PyObject v) {
          return unicode(v.__str__(), null, null);
      }
  
      public static PyString unicode(PyString v, String encoding) {