text: # -*- coding: utf-8 -*-
  
  # Copyright 2017 IBM RESEARCH. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  # =============================================================================
  
  """
  Quantum register reference object.
  
  Author: Andrew Cross
  """
  from ._register import Register
  from ._instructionset import InstructionSet
  
  
  class QuantumRegister(Register):
      """Implement a quantum register."""
  
      def qasm(self):
          """Return OPENQASM string for this register."""
          return "qreg %s[%d];" % (self.name, self.size)
  
      def __str__(self):
          """Return a string representing the register."""
          return "QuantumRegister(%s,%d)" % (self.name, self.size)
  