1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
# mode: run
# tag: cpp, werror, no-cpp-locals, cpp11
from cython.operator cimport dereference as deref
from cython.operator cimport preincrement as incr
from libcpp.list cimport list as cpp_list
def const_iteration_test(L):
"""
>>> const_iteration_test([1,2,4,8])
1
2
4
8
"""
l = new cpp_list[int]()
try:
for a in L:
l.push_back(a)
it = l.cbegin()
while it != l.cend():
a = deref(it)
incr(it)
print(a)
finally:
del l
cdef list const_to_pylist(cpp_list[int]& l):
cdef list L = []
it = l.cbegin()
while it != l.cend():
L.append(deref(it))
incr(it)
return L
def const_item_ptr_test(L, int x):
"""
>>> const_item_ptr_test(range(10), 100)
[100, 1, 2, 3, 4, 5, 6, 7, 8, 9]
"""
cdef cpp_list[int] l = L
cdef int* li_ptr = &l.front()
li_ptr[0] = x
return const_to_pylist(l)
|
