cedar-policy-core 2.4.0

Core implemenation of the Cedar Policy language.
Documentation 
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/*
 * Copyright 2022-2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * 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
 *
 * 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.
 */

use std::sync::Arc;

/// Arc::unwrap_or_clone() isn't stabilized as of this writing, but this is its implementation
//
// TODO: use `Arc::unwrap_or_clone()` once stable
pub fn unwrap_or_clone<T: Clone>(arc: Arc<T>) -> T {
    Arc::try_unwrap(arc).unwrap_or_else(|arc| (*arc).clone())
}