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# ticket: 258
cdef extern from "Python.h":
ctypedef class __builtin__.list [object PyListObject]:
cdef Py_ssize_t allocated
ctypedef class __builtin__.dict [object PyDictObject]:
pass
cdef Py_ssize_t Py_SIZE(object o)
cdef list L = [1,2,4]
cdef dict d = {'A': 'a'}
def test_list(list L):
"""
>>> test_list(list(range(10)))
True
>>> class list_subclass(list): pass
>>> test_list(list_subclass([1,2,3]))
True
"""
return Py_SIZE(L) <= L.allocated
def test_tuple(tuple t):
"""
Actual builtin types are restrictive wrt subclassing so optimizations can be safely performed.
>>> test_tuple((1,2))
2
>>> class tuple_subclass(tuple): pass
>>> test_tuple(tuple_subclass((1,2)))
Traceback (most recent call last):
...
TypeError: Argument 't' has incorrect type (expected tuple, got tuple_subclass)
"""
return len(t)
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