Qiskit / qiskit / 15719313857

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Committed by web-flow

Commit Message

Add `DAGCircuit.make_physical` (#14587)

* Add `DAGCircuit.make_physical`

This method replaces the qubits on the `DAGCircuit` with the "canonical"
physical register.  This does a similar job to running `TrivialLayout`,
ancilla-allocation/expansion and `ApplyLayout`, and in fact this method
can be used as one half of action of `ApplyLayout` in general.

This commit is a stepping stone to having `ApplyLayout` in pure Rust
space.  The `TrivialLayout` pass could also, in a follow-up, be upgraded
to be similar to `SabreLayout` and perform its layout action inline too.
That can follow in a separate patch, however, since it has additional
API considerations, as it would change the behaviour of the pass.

* Reword description of method from 'cheap'

* Use `num_qubits` in Rust-space `make_physical`

* Update crates/circuit/src/dag_circuit.rs

Co-authored-by: Matthew Treinish <mtreinish@kortar.org>

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Co-authored-by: Matthew Treinish <mtreinish@kortar.org>

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43 of 49 new or added lines in 1 file covered. (87.76%)

7 existing lines in 2 files now uncovered.

83656 of 95069 relevant lines covered (88.0%)

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