Support nullary RowFn execution - #9469
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This was referenced Aug 18, 2026
Signed-off-by: Connor Tsui <connor.tsui20@gmail.com>
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Rationale for this change
RowFnover Vortex arrays #9130Keeps nullary execution separate from the numeric-kernel executor path.
What changes are included in this PR?
Executes a nullary row kernel once for the requested row count, then validates and returns its output. Nullary kernels bypass batch validity handling because they have no input validity to propagate.
What APIs are changed? Are there any user-facing changes?
Adds nullary execution within the existing unstable
RowFnboundary. There are no stable API changes.