Qiskit / qiskit / 17238534397

88%

Build Type

push

github

Committed by web-flow

Commit Message

Port `ApplyLayout` to Rust (#14904)

* Port `ApplyLayout` to Rust

This adds and uses the Rust-space paths for `ApplyLayout`.  The Rust
interface is deliberately forwards looking; it uses the new Rust-space
`TranspileLayout` and all the surrounding infrastructure to begin the
process of transitioning our passes to move the `TranspileLayout` to an
inherent field on `DAGCircuit`, and updated by all relevant passes in
Qiskit directly, rather than the ad-hoc, frequently temporarily
out-of-sync collection of properties in the `PropertySet`.

The Rust-space version of `ApplyLayout` is split into the two forms:
"apply a layout for the first time" (`apply_layout`) and "improve an
already set layout" (`update_layout`).  `apply_layout` can also handle
the allocation of explicit ancillas automatically.  The Python-space
version of the class is not yet upgraded to allow this functionality,
but that can be done in a follow-up.

* Remove equality message from assertion panics

* Clarify logic of ancilla allocation

* Distinguish layouts from relabellings of layouts

* Clarify action of `ApplyLayout`

Run Details

224 of 281 new or added lines in 10 files covered. (79.72%)

59 existing lines in 6 files now uncovered.

90098 of 101939 relevant lines covered (88.38%)

488474.9 hits per line