[WIP] Conference

submodules/TelegramCore/FlatBuffers/Sources/Enum.swift

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+/*
+ * Copyright 2024 Google Inc. 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
+ *
+ *     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
+
+/// Enum is a protocol that all flatbuffers enums should conform to
+/// Since it allows us to get the actual `ByteSize` and `Value` from
+/// a swift enum.
+public protocol Enum {
+  /// associatedtype that the type of the enum should conform to
+  associatedtype T: Scalar & Verifiable
+  /// Size of the current associatedtype in the enum
+  static var byteSize: Int { get }
+  /// The current value the enum hosts
+  var value: T { get }
+}
+
+extension Enum where Self: Verifiable {
+
+  /// Verifies that the current value is which the bounds of the buffer, and if
+  /// the current `Value` is aligned properly
+  /// - Parameters:
+  ///   - verifier: Verifier that hosts the buffer
+  ///   - position: Current position within the buffer
+  ///   - type: The type of the object to be verified
+  /// - Throws: Errors coming from `inBuffer` function
+  public static func verify<T>(
+    _ verifier: inout Verifier,
+    at position: Int,
+    of type: T.Type) throws where T: Verifiable
+  {
+    try verifier.inBuffer(position: position, of: type.self)
+  }
+
+}
+
+/// UnionEnum is a Protocol that allows us to create Union type of enums
+/// and their value initializers. Since an `init` was required by
+/// the verifier
+public protocol UnionEnum: Enum {
+  init?(value: T) throws
+}