Added
- `init` non-unitary instruction
- `SWAP` two-qubit unitary instruction
- `barrier` and `wait` control instructions
- `SingleQubitGatesMerger` merger pass
- `SWAP2CNOTDecomposer` decomposer pass
- `CNOT2CZDecomposer` decomposer pass
- `RoutingChecker` routing pass
- Restore SGMQ notation for barrier groups in cQASMv1 Exporter
Changed
- Importing modules, classes, and functionalities simplified
- `merge_single_qubit_gates` method of `Circuit` class,
changed to general `merge` method that accepts custom merger passes
- libQASM 0.6.9 integrated (updated from 0.6.7)
- Refactor: code base adheres to the PEP8 style guide
- Refactor: instruction library simplified
- Refactor: comment nodes removed from IR
Fixed
- Bug in ABA-decomposer
- Bug in McKay-decomposer (all single-qubit Clifford gates are verified)