# mode: run

PYTHON setup.py build_ext --inplace
PYTHON -c "import classes"
PYTHON -c "import test_inherit"

######## setup.py ########

from Cython.Build.Dependencies import cythonize

from distutils.core import setup

setup(
  ext_modules=cythonize("*.pyx"),
)

######  dummy_module.py ###########

tpl = tuple
lst = list

###### classes.pxd ################

cdef extern from *:
    # apart from list, these are all variable sized types
    # and Cython shouldn't trip up about the struct size
    ctypedef class dummy_module.tpl [object PyTupleObject]:
        pass
    ctypedef class dummy_module.lst [object PyListObject]:
        pass
    ctypedef class types.CodeType [object PyCodeObject]:
        pass
    # Note that bytes doesn't work here because it further 
    # the tp_basicsize to save space
        
##### classes.pyx #################

def check_tuple(tpl x):
    assert isinstance(x, tuple)
    
def check_list(lst x):
    assert isinstance(x, list)
    
def check_code(CodeType x):
    import types
    assert isinstance(x, types.CodeType)
    
check_tuple((1, 2))
check_list([1, 2])
check_code(eval("lambda: None").__code__)

##### failed_inherit1.pyx #############

from classes cimport tpl

cdef class SuperTuple(tpl):
    cdef int a  # importing this gives an error message

##### failed_inherit2.pyx #############

from classes cimport tpl

cdef class SuperTuple(tpl):
    # adding a method creates a vtab so should also fail
    cdef int func(self):
        return 1
    
##### successful_inherit.pyx #########

from classes cimport lst, tpl

cdef class SuperList(lst):
    cdef int a  # This works OK
    
cdef class SuperTuple(tpl):
    # This is actually OK because it doesn't add anything
    pass
    
##### test_inherit.py ################

try:
    import failed_inherit1
except TypeError as e:
    assert e.args[0] == "inheritance from PyVarObject types like 'tuple' not currently supported", e.args[0]
else:
    assert False
try:
    import failed_inherit2
except TypeError as e:
    assert e.args[0] == "inheritance from PyVarObject types like 'tuple' not currently supported", e.args[0]
else:
    assert False
    
import successful_inherit