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`maybestatic_reshape` wrapped any array into an `SArray` for a static size, which copies device arrays and traced arrays to the host. Only `StaticArray` inputs stay or become static arrays now, other arrays are reshaped with the non-static size. Created by generative AI.
Tools that generic code needs to keep static sizes static, collected from private helpers of MeasureBase: - `size_dims`, the inverse of `canonical_size`, and a type-level `axes2size` for statically sized axes. - `static_reduce`, `static_all` and `static_any`, pairwise folds over tuple types that infer as constants where `reduce`, `all` and `any` over tuples of values don't (Julia 1.10). - `sum_leading_dims`, `drop_leading_dims`, `merge_leading_dims` and `all_leading_dims`, indexed by a static number of leading dimensions. Static arrays stay static, lazy broadcasts are reduced lazily where their style allows it. - `maybestatic_view` and `split_at`, views and splits of vectors and tuples that stay static for static inputs and indices. Created by generative AI.
Reducing dimension by dimension costs one kernel launch per dimension on a device. Only StaticArrays needs it, `all` over several dimensions at once is unsupported there. Created by generative AI.
`static_reduce(op, f, T)` becomes `static_mapreduce(f, op, T)`, like `mapreduce(f, op, itr)`, and `static_reduce(op, T)` stays the `identity` case. Reducing an empty tuple type has no result and says so. `maybestatic_view` also takes an index range, like `view`. Created by generative AI.
Created by generative AI.
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Written by Claude (Fable 5.1, high effort) on behalf of the maintainer.
Work in progress, companion to JuliaMath/MeasureBase.jl#182.
Static and dynamic size tools that MeasureBase's batched-first rewrite needs, moved here from MeasureBase's private helpers so that other packages can use them:
size_dims, a type-levelaxes2size, constant-folding reductions over tuple types (static_reduce,static_mapreduce,static_all,static_any, folded pairwise so they infer as constants on Julia 1.10), a static-preserving leading-dimensions family (sum_leading_dims,drop_leading_dims,merge_leading_dims,all_leading_dims), and static-preserving vector splits and views (split_at,maybestatic_view).One breaking change, hence 0.3.0:
maybestatic_reshapekeeps onlyStaticArrayinputs static. It used to wrap any array, including device and traced arrays, into anSArraywhen the target size was static, which copies through the host. See NEWS.md.https://claude.ai/code/session_01L5yPndh2K6u14z3CwF9YXf