Add Circuit.add_command() method

[CalMacCQ]

When using CustomPass users frequently need often need to iterate through a list of circuit commands and do some case handling for different OpTypes using Command.op.type.

replacement_circ = Circuit(input_circ.n_qubits)
for cmd in circ.get_commands():
    if cmd.op.type == OpType.X:
        ...
    else:
        ...

See the manual example.

After this checking is done we often add the command to a replacement circuit with something like

 replacement_circ.add_gate(cmd.op.type, cmd.op.params, cmd.qubits)

It'd be nicer to be able do something like this instead

 replacement_circ.add_command(cmd, cmd.args)

[github-actions]

This issue has been automatically marked as stale.