Replace SwapPermutationReplacer with cirq.map_operations
#5655
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vtomole
reviewed
Jul 6, 2022
| @@ -307,7 +297,7 @@ def compile_circuit( | |||
| # as well, we allow this to be passed in. This compiler is not allowed to | |||
| # change the order of the qubits. | |||
| return CompilationResult( | |||
| circuit=compiler(swap_networks[0].circuit), mapping=mapping, parity_map=parity_map | |||
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Why was swap_networks[0].circuit being passed in in the first place instead of routed_circuit?
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Because the original optimizer mutated the circuit. routed_circuit was a variable storing a reference to swap_networks[0].circuit and since the underlying circuit was being mutated; it didn't matter whether you pass swap_networks[0].circuit or routed_circuit.
Now, routed_circuit stores a modified copy of swap_networks[0].circuit and therefore we need to pass routed_circuit instead of swap_networks[0].circuit.
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Part of #5028
Since
SwapPermutationReplaceris not exposed outside the file, we don't need to go through the deprecation cycle