def add_creg(self, creg):
"""Add all wires in a classical register."""
if not isinstance(creg, ClassicalRegister):
raise DAGDependencyError("not a ClassicalRegister instance.")
if creg.name in self.cregs:
raise DAGDependencyError("duplicate register %s" % creg.name)
self.cregs[creg.name] = creg
def add_qreg(self, qreg):
"""Add qubits in a quantum register."""
if not isinstance(qreg, QuantumRegister):
raise DAGDependencyError("not a QuantumRegister instance.")
if qreg.name in self.qregs:
raise DAGDependencyError("duplicate register %s" % qreg.name)
self.qregs[qreg.name] = qreg
def add_creg(self, creg):
"""Add clbits in a classical register."""
if not isinstance(creg, ClassicalRegister):
raise DAGDependencyError("not a ClassicalRegister instance.")
if creg.name in self.cregs:
raise DAGDependencyError("duplicate register %s" % creg.name)
self.cregs[creg.name] = creg
for j in range(creg.size):
self.clbits.append(creg[j])
def add_clbits(self, clbits):
"""Add individual clbit wires."""
if any(not isinstance(clbit, Clbit) for clbit in clbits):
raise DAGDependencyError("not a Clbit instance.")
duplicate_clbits = set(self.clbits).intersection(clbits)
if duplicate_clbits:
raise DAGDependencyError("duplicate clbits %s" % duplicate_clbits)
self.clbits.extend(clbits)
def add_qubits(self, qubits):
"""Add individual qubit wires."""
if any(not isinstance(qubit, Qubit) for qubit in qubits):
raise DAGDependencyError("not a Qubit instance.")
duplicate_qubits = set(self.qubits).intersection(qubits)
if duplicate_qubits:
raise DAGDependencyError("duplicate qubits %s" % duplicate_qubits)
self.qubits.extend(qubits)
def add_qreg(self, qreg):
"""Add qubits in a quantum register."""
if not isinstance(qreg, QuantumRegister):
raise DAGDependencyError("not a QuantumRegister instance.")
if qreg.name in self.qregs:
raise DAGDependencyError("duplicate register %s" % qreg.name)
self.qregs[qreg.name] = qreg
existing_qubits = set(self.qubits)
for j in range(qreg.size):
if qreg[j] not in existing_qubits:
self.qubits.append(qreg[j])
def raise_if_dagdependency_invalid(dag):
"""Validates the internal consistency of a DAGDependency._multi_graph.
Intended for use in testing.
Raises:
DAGDependencyError: if DAGDependency._multi_graph is inconsistent.
"""
multi_graph = dag._multi_graph
if not rx.is_directed_acyclic_graph(multi_graph):
raise DAGDependencyError("multi_graph is not a DAG.")
# Every node should be of type op.
for node in dag.get_nodes():
if node.type != "op":
raise DAGDependencyError("Found node of unexpected type: {}".format(node.type))