[Pyrex] Subclassing - design question

[Helmut Jarausch]

Hi,

given

cdef class B:
  cdef int Seen
  def __new__(self):
    self.Seen=17

cdef class D(B):
  def __new__(self,int DS):
    .....

In Python the __init__ method of a base class must be called
explicity (similarly to the base class initialization call
in a C++ constructor)
This is necessary since the base' __init__ can be called
with different arguments.

But in Pyrex the __new__ method of the base class is automatically
called by the python runtime library, so Pyrex can only fill 
ONE possible call into the PyTypeObject table.

Currently, function generate_new_function (if base_type:) of Nodes.py
just copies it's own argument list. So, IHMO, Pyrex would need a
new syntactic possiblity to let the user specify the arguments going
to the base class.

This shoe is too big for me (literal translation of a German saying)

Helmut.

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany