method aliasing via assignment

[rmurri]

It would be nice to have method aliasing via assignment, i.e.

def foo():
  # do something
bar = foo

As of Cython 0.11.1, this works with "def" and "cpdef" methods, but fails for "cdef" ones::

def foo():
    print "foo"
bar = foo

cdef foo2():
     print "foo2"
bar2 = foo2  # fails with error::  Cannot convert 'object (void)' to Python object


cdef class A(object):
     def foo(self):
         print "A.foo"
     bar = foo

     cdef foo2(self):
         print "A.foo2"
     bar2 = foo2  # fails with error:: Cannot convert 'object (A)' to Python object

     cpdef foo3(self):
         print "A.foo3"
     bar3 = foo3

bar()
bar2()
a = A()
a.foo()
a.foo2()
a.foo3()

It also fails for some instances of Python's "__special__" methods, see e.g.  http://codespeak.net/pipermail/cython-dev/2009-April/004898.html

[scoder]

Note that the assignments to cdef class attributes fail because you haven't declared the target name to have the same type as the function (which does not have a Python object type). So this part of the feature depends on type inference and assignment tracking (i.e. flow analysis).