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|
# mode: run
# tag: closures
# ticket: t82
# preparse: id
# preparse: def_to_cdef
cimport cython
def add_n(int n):
"""
>>> f = add_n(3)
>>> f(2)
5
>>> f = add_n(1000000)
>>> f(1000000), f(-1000000)
(2000000, 0)
"""
def f(int x):
return x+n
return f
def a(int x):
"""
>>> a(5)()
8
"""
def b():
def c():
return 3+x
return c()
return b
def local_x(int arg_x):
"""
>>> local_x(1)(2)(4)
4 2 1
15
"""
cdef int local_x = arg_x
def y(arg_y):
y = arg_y
def z(long arg_z):
cdef long z = arg_z
print z, y, local_x
return 8+z+y+local_x
return z
return y
def x(int x):
"""
>>> x(1)(2)(4)
15
"""
def y(y):
def z(long z):
return 8+z+y+x
return z
return y
def x2(int x2):
"""
>>> x2(1)(2)(4)
4 2 1
15
"""
def y2(y2):
def z2(long z2):
print z2, y2, x2
return 8+z2+y2+x2
return z2
return y2
def inner_override(a,b):
"""
>>> inner_override(2,4)()
5
"""
def f():
a = 1
return a+b
return f
def reassign(x):
"""
>>> reassign(4)(2)
3
"""
def f(a):
return a+x
x = 1
return f
def reassign_int(x):
"""
>>> reassign_int(4)(2)
3
"""
def f(int a):
return a+x
x = 1
return f
def reassign_int_int(int x):
"""
>>> reassign_int_int(4)(2)
3
"""
def f(int a):
return a+x
x = 1
return f
def cy_twofuncs(x):
"""
>>> def py_twofuncs(x):
... def f(a):
... return g(x) + a
... def g(b):
... return x + b
... return f
>>> py_twofuncs(1)(2) == cy_twofuncs(1)(2)
True
>>> py_twofuncs(3)(5) == cy_twofuncs(3)(5)
True
"""
def f(a):
return g(x) + a
def g(b):
return x + b
return f
def switch_funcs(a, b, int ix):
"""
>>> switch_funcs([1,2,3], [4,5,6], 0)([10])
[1, 2, 3, 10]
>>> switch_funcs([1,2,3], [4,5,6], 1)([10])
[4, 5, 6, 10]
>>> switch_funcs([1,2,3], [4,5,6], 2) is None
True
"""
def f(x):
return a + x
def g(x):
return b + x
if ix == 0:
return f
elif ix == 1:
return g
else:
return None
def ignore_func(x):
def f():
return x
return None
def call_ignore_func():
"""
>>> call_ignore_func()
"""
ignore_func((1,2,3))
def more_inner_funcs(x):
"""
>>> inner_funcs = more_inner_funcs(1)(2,4,8)
>>> inner_funcs[0](16), inner_funcs[1](32), inner_funcs[2](64)
(19, 37, 73)
"""
# called with x==1
def f(a):
def g(b):
# called with 16
return a+b+x
return g
def g(b):
def f(a):
# called with 32
return a+b+x
return f
def h(b):
def f(a):
# called with 64
return a+b+x
return f
def resolve(a_f, b_g, b_h):
# called with (2,4,8)
return f(a_f), g(b_g), h(b_h)
return resolve
@cython.test_assert_path_exists("//DefNode//DefNode//DefNode//DefNode",
"//DefNode[@needs_outer_scope = False]", # deep_inner()
"//DefNode//DefNode//DefNode//DefNode[@needs_closure = False]", # h()
)
@cython.test_fail_if_path_exists("//DefNode//DefNode[@needs_outer_scope = False]")
def deep_inner():
"""
>>> deep_inner()()
2
"""
cdef int x = 1
def f():
def g():
def h():
return x+1
return h
return g()
return f()
@cython.test_assert_path_exists("//DefNode//DefNode//DefNode",
"//DefNode//DefNode//DefNode[@needs_outer_scope = False]", # a()
"//DefNode//DefNode//DefNode[@needs_closure = False]", # a(), g(), h()
)
@cython.test_fail_if_path_exists("//DefNode//DefNode//DefNode[@needs_closure = True]") # a(), g(), h()
def deep_inner_sibling():
"""
>>> deep_inner_sibling()()
2
"""
cdef int x = 1
def f():
def a():
return 1
def g():
return x+a()
def h():
return g()
return h
return f()
|
