def _gate_definition_to_qiskit_definition(self, node, params):
"""From a gate definition in qasm, to a gate.definition format."""
definition = []
qreg = QuantumRegister(node['n_bits'])
bit_args = {node['bits'][i]: q for i, q in enumerate(qreg)}
exp_args = {node['args'][i]: Real(q) for i, q in enumerate(params)}
for child_op in node['body'].children:
qparams = []
eparams = []
for param_list in child_op.children[1:]:
if param_list.type == 'id_list':
qparams = [bit_args[param.name] for param in param_list.children]
elif param_list.type == 'expression_list':
for param in param_list.children:
eparams.append(param.sym(nested_scope=[exp_args]))
op = self._create_op(child_op.name, params=eparams)
definition.append((op, qparams, []))
return definition
def _gate_rules_to_qiskit_circuit(self, node, params):
"""From a gate definition in qasm, to a QuantumCircuit format."""
rules = []
qreg = QuantumRegister(node['n_bits'])
bit_args = {node['bits'][i]: q for i, q in enumerate(qreg)}
exp_args = {node['args'][i]: Real(q) for i, q in enumerate(params)}
for child_op in node['body'].children:
qparams = []
eparams = []
for param_list in child_op.children[1:]:
if param_list.type == 'id_list':
qparams = [bit_args[param.name] for param in param_list.children]
elif param_list.type == 'expression_list':
for param in param_list.children:
eparams.append(param.sym(nested_scope=[exp_args]))
op = self._create_op(child_op.name, params=eparams)
rules.append((op, qparams, []))
circ = QuantumCircuit(qreg)
for instr, qargs, cargs in rules:
circ._append(instr, qargs, cargs)
return circ