[Cython] error when cythonizing unicode

[Stefan Behnel]

Hi,

Ondrej Certik wrote:
> another bug was discovered in the Cython 0.9.6.11 in Debian:
> 
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=464751

Here is a test case with things I could imagine to work for "unicode":

-------------------------------
__doc__ = """
   >>> u('test')
   u'test'
   >>> z
   u'test'
   >>> c('testing')
   u'testing'
   >>> subu('testing a Python subtype')
   u'testing a Python subtype'
   >>> csubu('testing a C subtype')
   u'testing a C subtype'
   >>> sub('testing a Python subtype')
   u'testing a Python subtype'
   >>> csub('testing a C subtype')
   u'testing a C subtype'
"""

u = unicode          # doesn't currently work
z = unicode('test')

class subu(unicode):  # doesn't currently work
    pass

cdef class csubu(unicode): # doesn't currently work
    pass

def c(string):
    return unicode(string)

def csub(string):
    return csubu(string)

def sub(string):
    return subu(string)
-------------------------------

My work-around fixes the first two cases, so that's not too bad. And I think
the "cdef" thing would be a new feature anyway.

@Robert: maybe we should remove the "builtin_functions" dict in Symtab.py
completely. It looks like it just breaks things.

Stefan
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