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__setitem__ type promotion rules for array values #920

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__setitem__ type promotion rules for array values #920

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6 changes: 4 additions & 2 deletions src/array_api_stubs/_draft/array_object.py
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Expand Up @@ -1134,8 +1134,10 @@ def __setitem__(
Indexing semantics when ``key`` is an integer array or a tuple of integers and integer arrays is currently unspecified and thus implementation-defined. This will be revisited in a future revision of this standard.

- Setting array values must not affect the data type of ``self``.
- When ``value`` is a Python scalar (i.e., ``int``, ``float``, ``complex``, ``bool``), behavior must follow specification guidance on mixing arrays with Python scalars (see :ref:`type-promotion`).
- When ``value`` is an ``array`` of a different data type than ``self``, how values are cast to the data type of ``self`` is implementation defined.
- ``value`` must be promoted to ``self.dtype`` according to :ref:`type-promotion`; if this is not possible, behavior is undefined.

.. versionchanged:: 2025.12
Specified :ref:`type-promotion` when ``value`` is an array.
"""

def __sub__(self: array, other: Union[int, float, complex, array], /) -> array:
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