def _strat_apply_gate(self, val: Any, qubits: Sequence['cirq.Qid']) -> bool:
if not protocols.has_stabilizer_effect(val):
return NotImplemented
gate = val.gate if isinstance(val, ops.Operation) else val
axes = self.get_axes(qubits)
exponent = cast(float, getattr(gate, 'exponent', None))
if isinstance(gate, common_gates.XPowGate):
self._state.apply_x(axes[0], exponent, gate.global_shift)
elif isinstance(gate, common_gates.YPowGate):
self._state.apply_y(axes[0], exponent, gate.global_shift)
elif isinstance(gate, common_gates.ZPowGate):
self._state.apply_z(axes[0], exponent, gate.global_shift)
elif isinstance(gate, common_gates.HPowGate):
self._state.apply_h(axes[0], exponent, gate.global_shift)
elif isinstance(gate, common_gates.CXPowGate):
self._state.apply_cx(axes[0], axes[1], exponent, gate.global_shift)
elif isinstance(gate, common_gates.CZPowGate):
self._state.apply_cz(axes[0], axes[1], exponent, gate.global_shift)
elif isinstance(gate, global_phase_op.GlobalPhaseGate):
if isinstance(gate.coefficient, sympy.Expr):
return NotImplemented
self._state.apply_global_phase(gate.coefficient)
elif isinstance(gate, swap_gates.SwapPowGate):
self._swap(axes[0], axes[1], exponent, gate.global_shift)
else:
return NotImplemented
return True
def _strat_decompose(self, val: Any, qubits: Sequence['cirq.Qid']) -> bool:
gate = val.gate if isinstance(val, ops.Operation) else val
operations = protocols.decompose_once_with_qubits(gate, qubits, None)
if operations is None or not all(protocols.has_stabilizer_effect(op) for op in operations):
return NotImplemented
for op in operations:
protocols.act_on(op, self)
return True
def is_supported_operation(op: 'cirq.Operation') -> bool:
"""Checks whether given operation can be simulated by this simulator."""
# TODO: support more general Pauli measurements
return protocols.has_stabilizer_effect(op)
