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Use a single unsigned bounds compare, say in the error message that negative indices are not supported, document the behavior on the accessors, and cover offset_at/offset_at_t in test_bounds_check. Assisted-by: ClaudeCode:claude-opus-5-5
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Description
Alternative to #6187, retaining both of its commits and adding NumPy-style negative indexing for checked
array/array_taccessors and negative axes forshape()/strides().#6187 rejects all negative indices; this wraps valid negative indices (
-1selects the last element or axis) and raisesIndexErrorfor indices outside the valid range. Unchecked accessors keep their existing behavior. See the discussion and local cost comparison.Validation: local default and free-threaded CPython 3.14.4 test suites and
prek -a --quietpassed.Suggested changelog entry:
arrayandarray_taccessors.📚 Documentation preview 📚: https://pybind11--6201.org.readthedocs.build/