jython-checkins

[Finn B. <bc...@us...>]

Update of /cvsroot/jython/jython/org/python/core
In directory usw-pr-cvs1:/tmp/cvs-serv9354

Modified Files:
	__builtin__.java 
Log Message:
Made zip() use the __iter__ protocol.



Index: __builtin__.java
===================================================================
RCS file: /cvsroot/jython/jython/org/python/core/__builtin__.java,v
retrieving revision 2.44
retrieving revision 2.45
diff -C2 -d -r2.44 -r2.45
*** __builtin__.java	26 May 2002 20:47:20 -0000	2.44
--- __builtin__.java	26 May 2002 20:51:46 -0000	2.45
***************
*** 921,937 ****
  
          // Type check the arguments; they must be sequences.  Might as well
!         // cache the __getitem__() methods.
!         PyObject[] getitems = new PyObject[itemsize];
  
          for (int j=0; j < itemsize; j++) {
!             PyObject getitem = argstar[j].__findattr__("__getitem__");
!             if (getitem == null) {
!                 // Get the same error as CPython for instances.  This
!                 // should throw an AttributeError.
!                 if (argstar[j] instanceof PyInstance)
!                     argstar[j].__getattr__("__getitem__");
!                 throw Py.TypeError("unindexable object");
              }
!             getitems[j] = getitem;
          }
  
--- 921,934 ----
  
          // Type check the arguments; they must be sequences.  Might as well
!         // cache the __iter__() methods.
!         PyObject[] iters = new PyObject[itemsize];
  
          for (int j=0; j < itemsize; j++) {
!             PyObject iter = argstar[j].__iter__();
!             if (iter == null) {
!                 throw Py.TypeError("zip argument #" + (j + 1) +
!                                    " must support iteration");
              }
!             iters[j] = iter;
          }
  
***************
*** 945,955 ****
              for (int j=0; j < itemsize; j++) {
                  try {
!                     item = getitems[j].__call__(index);
                  }
                  catch (PyException e) {
!                     if (Py.matchException(e, Py.IndexError))
                          return ret;
                      throw e;
                  }
                  next[j] = item;
              }
--- 942,954 ----
              for (int j=0; j < itemsize; j++) {
                  try {
!                     item = iters[j].__iternext__();
                  }
                  catch (PyException e) {
!                     if (Py.matchException(e, Py.StopIteration))
                          return ret;
                      throw e;
                  }
+                 if (item == null)
+                     return null;
                  next[j] = item;
              }