Qiskit / qiskit / 8835880616

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Commit Message

Add support for returning a DAGCircuit to TwoQubitBasisDecomposer (#12109)

* Add support for returning a DAGCircuit to TwoQubitBasisDecomposer

This commit adds a new flag, use_dag, to the constructor for the
TwoQubitBasisDecomposer. When set to True, the __call__ method will
return a DAGCircuit instead of a QuantumCircuit. This is useful when the
two qubit basis decomposer is called from within a transpiler context,
as with the UnitarySynthesis pass, to avoid an extra conversion step.

* Pivot to argument on __call__ and add to XXDecomposer too

This commit moves the use_dag flag to the __call__ method directly
instead of storing it as an instance variable. To make the interface
consistent between the 2 built-in decomposers the flag is also added to
the XXDecomposer class's __call__ method too. This was needed because
the unitary synthesis pass calls the decomposers interchangeably and to
be able to use them without type checking they both will need the flag.

Run Details

66 of 78 new or added lines in 3 files covered. (84.62%)

15 existing lines in 3 files now uncovered.

60459 of 67585 relevant lines covered (89.46%)

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