Fix bug with length 1 AbstractNetworkIterator types not executing their only compute! call. #262
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jack-dunham wants to merge 3 commits intoITensor:mainfrom
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Fix bug with length 1 AbstractNetworkIterator types not executing their only compute! call. #262jack-dunham wants to merge 3 commits intoITensor:mainfrom
AbstractNetworkIterator types not executing their only compute! call. #262jack-dunham wants to merge 3 commits intoITensor:mainfrom
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…their single `compute!` call
…ives `BoundsError`. Constructing `RegionIterator` of length 0 is now undefined. Adjust region iterator `BoundsError` message to align with `SweepIterator`.
emstoudenmire
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Dec 9, 2025
…ne sweep case. (Includes changes from PR #262.)
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Description
Checking of
islaststepis now skipped for the first iteration. This fixes a bug where length 1 iterators don't iterate at all and thus don't execute their only call tocompute!.Skipping
islaststepcheck for the initial iterations makes sense as the interface ofAbstractNetworkIteratorassumes an implicit "move to first state" at construction.This also means that constructing a
AbstractNetworkIteratoris basically undefined as there is in that case there is no first state to move to. As such, constructingSweepIteratorandRegionIteratornow throws an error if if empty iterators are passed.I have added some tests for these edge cases; all other tests pass.