Unavailable Condition

Use #unavailable/#available instead of #available/#unavailable with an empty body.

• Identifier: unavailable_condition
• Enabled by default: Yes
• Supports autocorrection: No
• Kind: idiomatic
• Analyzer rule: No
• Minimum Swift compiler version: 5.6.0
• Default configuration:

  Key	Value
  severity	warning

Non Triggering Examples

if #unavailable(iOS 13) {
  loadMainWindow()
}

if #available(iOS 9.0, *) {
  doSomething()
} else {
  legacyDoSomething()
}

if #available(macOS 11.0, *) {
   // Do nothing
} else if #available(macOS 10.15, *) {
   print("do some stuff")
}

Triggering Examples

if ↓#available(iOS 14.0) {

} else {
  oldIos13TrackingLogic(isEnabled: ASIdentifierManager.shared().isAdvertisingTrackingEnabled)
}

if ↓#available(iOS 14.0) {
  // we don't need to do anything here
} else {
  oldIos13TrackingLogic(isEnabled: ASIdentifierManager.shared().isAdvertisingTrackingEnabled)
}

if ↓#available(iOS 13, *) {} else {
  loadMainWindow()
}

if ↓#unavailable(iOS 13) {
  // Do nothing
} else if i < 2 {
  loadMainWindow()
}