# Copyright 2018 The Cirq Developers
#
# 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
#
# https://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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"""An optimization pass that removes empty moments from a circuit."""
from cirq.circuits.circuit import Circuit
from cirq.circuits.optimization_pass import OptimizationPass
[docs]class DropEmptyMoments(OptimizationPass):
"""Removes empty moments from a circuit."""
[docs] def optimize_circuit(self, circuit: Circuit):
circuit[:] = (m for m in circuit if m.operations)