Rust side NLayout.copy()

Qiskit · Aug 16, 2022 · f07ba74 · f07ba74
1 parent bbfc1c7
commit f07ba74
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/qiskit/transpiler/passes/routing/sabre_swap.py b/qiskit/transpiler/passes/routing/sabre_swap.py
@@ -202,7 +202,7 @@ def run(self, dag):
             self._bit_indices[k]: v for k, v in current_layout.get_virtual_bits().items()
         }
         layout = NLayout(layout_mapping, len(dag.qubits), self.coupling_map.size())
-        original_layout = NLayout(layout_mapping, len(dag.qubits), self.coupling_map.size())
+        original_layout = layout.copy()
 
         dag_list = []
         for node in dag.topological_op_nodes():

diff --git a/src/nlayout.rs b/src/nlayout.rs
@@ -112,4 +112,8 @@ impl NLayout {
     pub fn swap_physical(&mut self, bit_a: usize, bit_b: usize) {
         self.swap(bit_a, bit_b)
     }
+
+    pub fn copy(&self) -> NLayout {
+        self.clone()
+    }
 }