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Source code for qiskit.circuit.controlflow.control_flow

# This code is part of Qiskit.
#
# (C) Copyright IBM 2021.
#
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
#
# Any modifications or derivative works of this code must retain this
# copyright notice, and modified files need to carry a notice indicating
# that they have been altered from the originals.

"Container to encapsulate all control flow operations."

from abc import ABC, abstractmethod
from typing import Tuple, Iterable

from qiskit.circuit import QuantumCircuit, Instruction


[docs]class ControlFlowOp(Instruction, ABC): """Abstract class to encapsulate all control flow operations.""" @property @abstractmethod def blocks(self) -> Tuple[QuantumCircuit, ...]: """Tuple of QuantumCircuits which may be executed as part of the execution of this ControlFlowOp. May be parameterized by a loop parameter to be resolved at run time. """ pass
[docs] @abstractmethod def replace_blocks(self, blocks: Iterable[QuantumCircuit]) -> "ControlFlowOp": """Replace blocks and return new instruction. Args: blocks: Tuple of QuantumCircuits to replace in instruction. Returns: New ControlFlowOp with replaced blocks. """ pass