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# mode: run
# tag: forin
import sys
import cython
try:
from builtins import next
except ImportError:
def next(it):
return it.next()
def for_in_pyiter_pass(it):
"""
>>> it = Iterable(5)
>>> for_in_pyiter_pass(it)
>>> next(it)
Traceback (most recent call last):
StopIteration
"""
for item in it:
pass
def for_in_pyiter(it):
"""
>>> for_in_pyiter(Iterable(5))
[0, 1, 2, 3, 4]
"""
l = []
for item in it:
l.append(item)
return l
def for_in_list():
"""
>>> for_in_pyiter([1,2,3,4,5])
[1, 2, 3, 4, 5]
"""
@cython.test_assert_path_exists('//TupleNode//IntNode')
@cython.test_fail_if_path_exists('//ListNode//IntNode')
def for_in_literal_list():
"""
>>> for_in_literal_list()
[1, 2, 3, 4]
"""
l = []
for i in [1,2,3,4]:
l.append(i)
return l
@cython.test_assert_path_exists('//TupleNode//IntNode')
@cython.test_fail_if_path_exists('//ListNode//IntNode')
def for_in_literal_mult_list():
"""
>>> for_in_literal_mult_list()
[1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4]
"""
l = []
for i in [1,2,3,4] * 3:
l.append(i)
return l
def listcomp_over_multiplied_constant_tuple():
"""
>>> listcomp_over_multiplied_constant_tuple()
[[], [1, 2, 3], [1, 2, 3, 1, 2, 3], [1, 2, 3, 1, 2, 3, 1, 2, 3], [1, 2, 3, 1, 2, 3]]
"""
return [
[i for i in (1, 2, 3) * 0],
[i for i in (1, 2, 3) * 1],
[i for i in (1, 2, 3) * 2],
[i for i in (1, 2, 3) * 3],
[i for i in (1, 2, 3) * 2],
]
@cython.test_assert_path_exists('//ReturnStatNode//ForInStatNode//TupleNode')
@cython.test_fail_if_path_exists('//ReturnStatNode//ForInStatNode//ListNode')
def listcomp_over_multiplied_constant_list():
"""
>>> listcomp_over_multiplied_constant_list()
[[], [1, 2, 3], [1, 2, 3, 1, 2, 3], [1, 2, 3, 1, 2, 3, 1, 2, 3], [1, 2, 3, 1, 2, 3]]
"""
return [
[i for i in [1, 2, 3] * 0],
[i for i in [1, 2, 3] * 1],
[i for i in [1, 2, 3] * 2],
[i for i in [1, 2, 3] * 3],
[i for i in [1, 2, 3] * 2],
]
class Iterable(object):
"""
>>> for_in_pyiter(Iterable(5))
[0, 1, 2, 3, 4]
"""
def __init__(self, N):
self.N = N
self.i = 0
def __iter__(self):
return self
def __next__(self):
if self.i < self.N:
i = self.i
self.i += 1
return i
raise StopIteration
next = __next__
if sys.version_info[0] >= 3:
class NextReplacingIterable(object):
def __init__(self):
self.i = 0
def __iter__(self):
return self
def __next__(self):
if self.i > 5:
raise StopIteration
self.i += 1
self.__next__ = self.next2
return 1
def next2(self):
self.__next__ = self.next3
return 2
def next3(self):
del self.__next__
raise StopIteration
else:
class NextReplacingIterable(object):
def __init__(self):
self.i = 0
def __iter__(self):
return self
def next(self):
if self.i > 5:
raise StopIteration
self.i += 1
self.next = self.next2
return 1
def next2(self):
self.next = self.next3
return 2
def next3(self):
del self.next
raise StopIteration
def for_in_next_replacing_iter():
"""
>>> for_in_pyiter(NextReplacingIterable())
[1, 1, 1, 1, 1, 1]
"""
def for_in_gen(N):
"""
>>> for_in_pyiter(for_in_gen(10))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
"""
for i in range(N):
yield i
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