Use rust-native error for CommutationCancellation#16196
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Use rust-native errors in `DAGCircuit` This should be step 1 for splitting `PyDAGCircuit` from `DAGCircuit`. The following commits assure that any rust accessible method for `DAGCircuit` that: 1. Does not take a `py` token; 2. Is a public method. does not need to depend on `PyErr` to process any errors. It is ensured that these errors: - Maintain the level of detail that the previous ones did. - Correctly map to the same Python exceptions as before. The enumeration for these errors is called `DAGCircuitInnerError` (subject to change) and is implemented with `thiserror`. I chose this over `anyhow` because it is better for specifying where the error comes from based on its variant rather than the message it contains. Lint: Use names instead of underscores Add: `anyhow!` usage for `DAGCircuitError - Use `anyhow!` for any error types that don't require tracking of any variables coming from the `DAG` or that are part of the function arguments. - Consolidate the amount of `DAG` error variants down from 40+ to 21. Can be consolidated further. Fix: Existing error formatting - Use `this_error` to fix the formatting of current errors causing conflicts with their messages. - Add `is_var` argument to differentiate Variables and Stretches in `VariableNotInlined`. Fix: consolidate `RegistryAbsentObject` error. Add: errors for `size` and `depth`.
The following commits modify `CommutationAnalysis` to use rust-native errors throughout its pipeline. This is done mostly by implementing `DAGCircuitInnerError` based on Qiskit#16134 as a possible error in `CommutationError`.
The following commits modify `CommutationCancellation` to use rust-native errors throughout its pipeline. We implement the `CommutationCancelError` enumeration which derives from both `DAGCircuitError` and `CommutationError` as well as adding two new variants for operations with parameter expressions or undefined angles.
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Coverage Report for CI Build 25965198003Coverage decreased (-0.02%) to 87.694%Details
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The following commits modify
CommutationCancellationto use rust-native errors throughout its pipeline.We implement the
CommutationCancelErrorenumeration which derives from bothDAGCircuitErrorandCommutationErroras well as adding two new variants for operations with parameter expressions or undefined angles.Pre-requisites
DAGCircuit#16134CommutationAnalysis#16193AI/LLM disclosure