增加换肤功能

Pods/Protobuf/objectivec/GPBUnknownField+Additions.swift

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+// Protocol Buffers - Google's data interchange format
+// Copyright 2024 Google Inc.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+/// Swift specific additions to simplify usage.
+extension GPBUnknownField {
+
+  /// The value of the field in a type-safe manner.
+  public enum Value: Equatable {
+    case varint(UInt64)
+    case fixed32(UInt32)
+    case fixed64(UInt64)
+    case lengthDelimited(Data)  // length prefixed
+    case group(GPBUnknownFields)  // tag delimited
+  }
+
+  /// The value of the field in a type-safe manner.
+  ///
+  /// - Note: This is only valid for non-legacy fields.
+  public var value: Value {
+    switch type {
+    case .varint:
+      return .varint(varint)
+    case .fixed32:
+      return .fixed32(fixed32)
+    case .fixed64:
+      return .fixed64(fixed64)
+    case .lengthDelimited:
+      return .lengthDelimited(lengthDelimited)
+    case .group:
+      return .group(group)
+    case .legacy:
+      fatalError("`value` not valid for Legacy fields.")
+    @unknown default:
+      fatalError("Internal error: Unknown field type: \(type)")
+    }
+  }
+
+}