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docs(transpiler-plugins): fix layout plugin example for v2.1.2 (#14985) #14991

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Merged
merged 4 commits into from
Oct 1, 2025
Merged

docs(transpiler-plugins): fix layout plugin example for v2.1.2 (#14985) #14991

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c32925e
docs(transpiler-plugins): fix layout plugin example for v2.1.2 (#14985)
ToroData Sep 5, 2025
5013e41
Merge branch 'Qiskit:main' into fix-docs-transpiler-plugin-14985
ToroData Sep 9, 2025
03bc0d6
Fix lint error in plugin.py docstring (line too long)
ToroData Sep 9, 2025
e23a451
Fix spacing
jakelishman Oct 1, 2025
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25 changes: 13 additions & 12 deletions qiskit/transpiler/preset_passmanagers/plugin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -103,31 +103,32 @@
from qiskit.transpiler import PassManager
from qiskit.transpiler.passes import VF2Layout, TrivialLayout
from qiskit.transpiler.passes.layout.vf2_layout import VF2LayoutStopReason
from qiskit.passmanager import ConditionalController


def _vf2_match_not_found(property_set):
return property_set["layout"] is None or (
property_set["VF2Layout_stop_reason"] is not None
and property_set["VF2Layout_stop_reason"] is not VF2LayoutStopReason.SOLUTION_FOUND
return property_set.get("layout") is None or (
property_set.get("VF2Layout_stop_reason") is not None
and property_set.get("VF2Layout_stop_reason")
is not VF2LayoutStopReason.SOLUTION_FOUND
)


class VF2LayoutPlugin(PassManagerStagePlugin):

def pass_manager(self, pass_manager_config, optimization_level):
layout_pm = PassManager(
[
VF2Layout(
coupling_map=pass_manager_config.coupling_map,
properties=pass_manager_config.backend_properties,
max_trials=optimization_level * 10 + 1
target=pass_manager_config.target
)
max_trials=optimization_level * 10 + 1,
target=pass_manager_config.target,
),
ConditionalController(
TrivialLayout(pass_manager_config.coupling_map),
condition=_vf2_match_not_found,
),
]
)
layout_pm.append(
TrivialLayout(pass_manager_config.coupling_map),
condition=_vf2_match_not_found,
)
layout_pm += common.generate_embed_passmanager(pass_manager_config.coupling_map)
return layout_pm

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