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# mode: run
# tag: cascade, compare
def ints_and_objects():
"""
>>> ints_and_objects()
(0, 1, 0, 1, 1, 0)
"""
cdef int int1=0, int2=0, int3=0, int4=0
cdef int r1, r2, r3, r4, r5, r6
cdef object obj1, obj2, obj3, obj4
obj1 = 1
obj2 = 2
obj3 = 3
obj4 = 4
r1 = int1 < int2 < int3
r2 = obj1 < obj2 < obj3
r3 = int1 < int2 < obj3
r4 = obj1 < 2 < 3
r5 = obj1 < 2 < 3 < 4
r6 = int1 < (int2 == int3) < int4
return r1, r2, r3, r4, r5, r6
def const_cascade(x):
"""
>>> const_cascade(2)
(True, False, True, False, False, True, False)
"""
return (
0 <= 1,
1 <= 0,
1 <= 1 <= 2,
1 <= 0 < 1,
1 <= 1 <= 0,
1 <= 1 <= x <= 2 <= 3 > x <= 2 <= 2,
1 <= 1 <= x <= 1 <= 1 <= x <= 2,
)
def eq_if_statement(a, b, c):
"""
>>> eq_if_statement(1, 2, 3)
False
>>> eq_if_statement(2, 3, 4)
False
>>> eq_if_statement(1, 1, 2)
False
>>> eq_if_statement(1, "not an int", 2)
False
>>> eq_if_statement(2, 1, 1)
False
>>> eq_if_statement(1, 1, 1)
True
"""
if 1 == a == b == c:
return True
else:
return False
def eq_if_statement_semi_optimized(a, int b, int c):
"""
Some but not all of the cascade ends up optimized
(probably not as much as should be). The test is mostly
that it keeps the types consistent throughout
>>> eq_if_statement_semi_optimized(1, 2, 3)
False
>>> eq_if_statement_semi_optimized(2, 3, 4)
False
>>> eq_if_statement_semi_optimized(1, 1, 2)
False
>>> eq_if_statement_semi_optimized("not an int", 1, 2)
False
>>> eq_if_statement_semi_optimized(2, 1, 1)
False
>>> eq_if_statement_semi_optimized(1, 1, 1)
True
"""
if 1 == a == b == c == 1:
return True
else:
return False
def eq_if_statement_semi_optimized2(a, b, c):
"""
Here only "b==c" fails to optimize
>>> eq_if_statement_semi_optimized2(1, 2, 3)
False
>>> eq_if_statement_semi_optimized2(2, 3, 4)
False
>>> eq_if_statement_semi_optimized2(1, 1, 2)
False
>>> eq_if_statement_semi_optimized2(1, "not an int", 2)
False
>>> eq_if_statement_semi_optimized2(2, 1, 1)
False
>>> eq_if_statement_semi_optimized2(1, 1, 1)
True
"""
if 1 == a == 1 == b == c:
return True
else:
return False
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