[iOS][RN 0.82][Xcode 16] RCT-Folly build fails with "Expected ';' after top level declarator"

Description

After upgrading to React Native 0.82 and Xcode 16, my iOS build fails with the following error in RCT-Folly:

Expected ';' after top level declarator

Steps to reproduce

Upgrade React Native project to 0.82.0

Upgrade pods (pod install)

Open .xcworkspace in Xcode 16

Build the iOS target

React Native Version

0.82.0

Affected Platforms

Build - MacOS

Output of npx @react-native-community/cli info

System:
  OS: macOS 15.2
  CPU: (10) arm64 Apple M4
  Memory: 970.17 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 22.16.0
    path: /opt/homebrew/opt/node@22/bin/node
  Yarn:
    version: 1.22.22
    path: /opt/homebrew/bin/yarn
  npm:
    version: 10.9.2
    path: /opt/homebrew/opt/node@22/bin/npm
  Watchman:
    version: 2025.05.19.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.4
      - iOS 18.4
      - macOS 15.4
      - tvOS 18.4
      - visionOS 2.4
      - watchOS 11.4
  Android SDK:
    API Levels:
      - "35"
      - "36"
    Build Tools:
      - 34.0.0
      - 35.0.0
      - 35.0.1
      - 36.0.0
    System Images:
      - android-36 | Google Play ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: 2025.1 AI-251.26094.121.2513.14007798
  Xcode:
    version: 16.3/16E140
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.14
    path: /Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react: Not Found
  react-native: Not Found
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Stacktrace or Logs

no

MANDATORY Reproducer

no

Screenshots and Videos

Reproduce the failure by upgrading a React Native project to 0.82.0, running pod install, and building the iOS target from the .xcworkspace in Xcode 16.3. Start with the RCT-Folly compilation output and the reported “Expected ';' after top level declarator” error. Done means the iOS target builds successfully under the stated React Native and Xcode versions.