# Copyright 2023 DeepMind Technologies Limited
#
# 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
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Semiring interface and einsum functions."""

import jax
import jax.numpy as jnp
# pylint: disable=g-importing-member
from synjax._src.utils.semirings import einsum_builder
from synjax._src.utils.semirings import LogSemiring
from synjax._src.utils.semirings import MaxSemiring
from synjax._src.utils.semirings import Semiring


einsum_log = einsum_builder(jax.nn.logsumexp, jnp.add)
einsum_max = einsum_builder(jnp.max, jnp.add)


__all__ = [
    "Semiring",
    "MaxSemiring",
    "LogSemiring",
    "einsum_builder",
    "einsum_log",
    "einsum_max",
]
