mutating func eatDrive()

in Sources/System/FilePath/FilePathWindows.swift [89:97]

• 8 lines of code
• 2 McCabe index (conditional complexity)

  mutating func eatDrive() -> SystemChar? {
    let copy = slice
    if let d = slice._eat(if: { $0.isLetter }), slice._eat(.colon) != nil {
      return d
    }
    // Restore slice
    slice = copy
    return nil
  }