Refactor advanced subtensor#1756

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jaanerik wants to merge 18 commits intopymc-devs:mainfrom

jaanerik:refactor-advanced-subtensor

Commits on Jan 7, 2026

Initial plan

Copilot
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Implement core refactoring of AdvancedSubtensor and AdvancedIncSubtensor

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Complete refactoring with improved factory functions and proper slice handling

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Final fix: use as_index_variable consistently with original implementation

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Refactor newaxis handling: move to __getitem__ level, unify with Subtensor approach

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Update dispatch functions and rewrite rules for new AdvancedSubtensor interface, store expected_inputs_len

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Finish Copilot code
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Replace np.newaxis with None, remove NoneConst from indexing
jaanerik
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Commits on Jan 8, 2026