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"""Utility library for working with protobufs."""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

from google.protobuf.internal import api_implementation


def uses_fast_cpp_protos_or_die():
  """Raises an error if a slow protobuf implementation is being used."""
  if api_implementation.Type() != 'cpp':
    raise ValueError('Expected to be using C++ protobuf implementation '
                     '(api_implementation.Type() == "cpp") but it is {}'.format(
                         api_implementation.Type()))