firebase-ios-sdk/scripts/zip_builder/Sources/Common/KeyedDecodingContainerExt.swift

/*
 * Copyright 2026 Google LLC
 *
 * 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.
 */

import Foundation

public extension KeyedDecodingContainer {
  /// Decodes a value if present, returning `nil` if the key is missing or the value is null.
  ///
  /// The decoded type is inferred from the call site.
  func decodeIfPresent<T: Decodable>(_ key: Key) throws -> T? {
    try decodeIfPresent(T.self, forKey: key)
  }
}