func isValidIndex()

in Sources/_CollectionsTestSupport/MinimalTypes/_CollectionState.swift [109:124]

• 16 lines of code
• 6 McCabe index (conditional complexity)

  func isValidIndex(_ index: MinimalIndex) -> Bool {
    if index._state === self { return true }
    guard index._state.context == context else { return false }
    guard index._offset >= 0 && index._offset <= count else { return false }
    switch strategy {
    case .allIndices:
      guard index._state.id == self.id else { return false }
    case .afterChange:
      if index._offset < count {
        guard index._state.id == indexValidity[index._offset] else { return false }
      } else {
        guard index._state.id == endIndexValidity else { return false }
      }
    }
    return true
  }