Commit f7c0c87e authored by Xavier Thompson's avatar Xavier Thompson

Add unit test against inplace operator with baseclass rhs inferring lhs to baseclass

parent 1ed9056d
# mode: run
# tag: cpp, cpp11
# cython: experimental_cpp_class_def=True, language_level=2
cdef cypclass A nolock:
int val
__init__(self, int a):
self.val = a
A __iadd__(self, A other):
self.val += (other.val + 1)
cdef cypclass B(A) nolock:
B __iadd__(self, A other):
self.val += (other.val + 10)
B __iadd__(self, B other):
self.val += (other.val + 100)
def test_inplace_operator_inference():
"""
>>> test_inplace_operator_inference()
111
"""
a = A(0)
b0 = B(0)
b1 = B(0)
# at this point, the types are unambiguous and the following assignments should not cause them to infer as another type.
a += b0 # should add 1
# before it being fixed, 'b0 += a' where 'a' is of type A caused 'b0' to be inferred as type A instead of B.
b0 += a # should add 10
# since all cypclass methods are virtual, 'b0' being erroneously inferred as type A would cause
# 'b0 += b1' to call 'B __iadd__(self, A other)' instead of 'B __iadd__(self, B other)'.
b0 += b1 # should add 100
return b0.val
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