Goals
* Reflect Apple nullability annotations in our bindings using C#8
* No warnings when building bindings
Non-Goals
* Update (add or fix) `[NullAllowed]` to match Apple headers (next phase)
* Make the generator or internal code fully nullable aware (`nowarn` is used)
Notes
* Apple's own annotations are not 100% accurate :(
* Where known issue exists we have _fixed_ our attributes to match reality :)
* We also do additional null-checks internally that might seems not required (better safe than sorry).
* Fix many version checks to be based on Xcode version instead of iOS version.
* Added/fixed a few expected values according to platform version to match behavior in older macOS versions.
This fixes the following test failures when building for debug with all optimizations enabled:
DispatchTests
[FAIL] DispatchTests.EverAfter : thread check hit
Expected: same as <UIKit.UIKitThreadAccessException>
But was: <System.ArgumentNullException>
at MonoTouchFixtures.CoreFoundation.DispatchTests.EverAfter () [0x000e1] in /Users/xamarinqa/vsts/_work/52/s/tests/monotouch-test/CoreFoundation/DispatchTests.cs:259
at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)
[FAIL] DispatchTests.MainQueueDispatch : thread check hit
Expected: same as <UIKit.UIKitThreadAccessException>
But was: <System.ArgumentNullException>
at MonoTouchFixtures.CoreFoundation.DispatchTests.MainQueueDispatch () [0x000d1] in /Users/xamarinqa/vsts/_work/52/s/tests/monotouch-test/CoreFoundation/DispatchTests.cs:111
at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)
Manuel de la Pena
Rolf Bjarne Kvinge
Sebastien Pouliot
michizhou
Vincent Dondain
Timothy Risi