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Ran 03 Jun 2026 08:02PM UTC

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Committed 03 Jun 2026 07:33PM UTC coverage: 87.474% (-0.01%) from 87.486%

Job # 26908228715.1

Build Type

push

github

Committed by

web-flow

Commit Message

Refactor ProgramNode::call to flatten+call_flat+unflatten (#16298)

* Refactor ProgramNode to flat call_flat + DataTree flatten/unflatten helpers

Split the ProgramNode trait so implementations only define
`call_flat(args: &[Tensor]) -> Result<Vec<Tensor>, _>` while a blanket
ProgramNodeExt provides the DataTree-shaped `call(args: &DataTree<Tensor>)`
on top. Adds the supporting DataTree machinery (`flatten_against`,
`unflatten`, `map_leaves`, `into_leaves`, `TreeMatchError`,
`ArityMismatch`) and structured call errors (`CallInputError`, `CallError`,
`MissingCallError`). Store is rewritten on top of `call_flat` and stores
its tensors as a flat `Vec<Tensor>` aligned with `output_types`.

* Fix double iteration in unflatten()

* three small changes from code review

* inlined helper functions into the functions they help

* write a custom iterator struct for into_leaves()

* add docstring for IntoLeaves::stack

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958943.44 hits per line

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