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Support indexedarray fields in struct #1327
Description
wp.indexedarray cannot currently be used as a field in wp.struct (assignment/device transfer/NumPy structured values) while it can be passed as an argument to a wp.kernel. There is no apparent reason not to support this possibility as all the blocks are already in place.
Minimal example for currently erroneous behavior:
import warp as wp
@wp.struct
class Foo:
arr: wp.indexedarray(dtype=wp.float32)Result:
Traceback (most recent call last):
File "examples/tmp.py", line 4, in <module>
@wp.struct
^^^^^^^^^
File ".pixi/envs/default/lib/python3.12/site-packages/warp/_src/context.py", line 1451, in struct
return wrapper(c)
^^^^^^^^^^
File ".pixi/envs/default/lib/python3.12/site-packages/warp/_src/context.py", line 1443, in wrapper
s = warp._src.codegen.Struct(key=warp._src.codegen.make_full_qualified_name(c), cls=c, module=m)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File ".pixi/envs/default/lib/python3.12/site-packages/warp/_src/codegen.py", line 522, in __init__
elif issubclass(var.type, ctypes.Array):
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: issubclass() arg 1 must be a class
Expected:
Allow wp.indexedarray fields in structs with the same behavior as wp.array:
- assign
indexedarray(orNone) to struct fields StructInstance.to(device)moves indexedarray members- works in kernels, nested structs, and struct arrays
Struct.numpy_dtype()/StructInstance.numpy_value()work
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shi-eric commentedon Apr 16, 2026
This was merged in 537ae37