[bug] c+=123 will not modify linked array but c[:]+=123 will

[3togo]

assume arrayfire array a is linked to asnumpy array b
and c = b.d_array

b*=2 will modify c
c+=123 will not modify b
but
c[:] += 123 will modify b

for details, you could refer to the code below.

import arrayfire as af
import afnumpy as afn

def ndarray_(s):
return afn.ndarray(s.shape, dtype=afn.pu.typemap(s.dtype()), af_array=s)

a = af.range(10) + 99
#b = afn.array(a) # a is copied to b
b = ndarray_(a) # a is linked to b
c = b.d_array
c[0] = af.log(c[0])
print(a)
print(b) # b is linked to c
print(c)
b *= 2
print(a)
print(b) # b is linked to c
print(c)
c[:] += 123
print(a)
print(b) # b is linked to c
print(c)
c += 123
print(a)
print(b) # b is linked to c
print(c)

[FilipeMaia]

Why do you consider this a bug?
You are modifying arrayfire-python arrays, and they do not follow numpy syntax.

If they were afnumpy arrays then I could understand your expectation.

[3togo]

b *= 2 ==> modifying through the pointer
b +=2 ==> not modifying through the pointer
not consistent

[FilipeMaia]

Where do you do b += 2?
You do c += 123. That's modifying an arrayfire array, which is not an afnumpy array.