Member functions of nested structs cannot be called

[AmesingFlank]

Consider this code segment, where the kernel k calls a member function of c1 which is a member of another struct c2.

@ti.dataclass
class C1:
    i: int

    @ti.func
    def is0(self):
        return self.i == 0

@ti.dataclass
class C2:
    c1: C1

    @ti.func
    def is0(self):
        return self.c1.is0()

@ti.kernel
def k(j:int):
    c1 = C1(j)
    c2 = C2(c1 = c1)
    print(c1.is0())

k(3)

This fails unexpectedly with

Traceback (most recent call last):
  File "/Users/dunfanlu/Code/Taichi/taichi/python/taichi/lang/ast/ast_transformer_utils.py", line 25, in __call__
    return method(ctx, node)
  File "/Users/dunfanlu/Code/Taichi/taichi/python/taichi/lang/ast/ast_transformer.py", line 852, in build_Attribute
    node.ptr = getattr(node.value.ptr, node.attr)
  File "/Users/dunfanlu/Code/Taichi/taichi/python/taichi/lang/common_ops.py", line 26, in __getattr__
    raise AttributeError(
AttributeError: 'Struct15' object has no attribute 'is0'

[oliver-batchelor]

Is this #6652 again?

[AmesingFlank]

Is this #6652 again?

hmm, I don't think it's because I used the same method name. If I use two different names it throws the same error.

[neozhaoliang]

Try the current master branch? I don't have this problem on Ubuntu22.04, intel card.

[AmesingFlank]

Try the current master branch? I don't have this problem on Ubuntu22.04, intel card.

Yep, the latest master works! I'm curious which PR fixed it though haha.

[neozhaoliang]

Should be this one: #6949 :P