# This code is part of Qiskit.
#
# (C) Copyright IBM 2018, 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.
"""
Simulator instruction to set a program counter
"""

from qiskit.circuit import Instruction


class AerMark(Instruction):
    """
    Mark instruction

    This instruction is a destination of jump instruction.
    Conditional is not allowed in Aer controller.
    """

    _directive = True

    def __init__(self, name, num_qubits, num_clbits=0):
        super().__init__("mark", num_qubits, num_clbits, [name])