The bug fixes continue to come flooding in. As always, get the full details in the official release notes.

Swift 2.2

• Failable and throwing initializers can both exit before initializing all stored properties or calling super.init()
• Nested C structs now import as nested Swift structs
• @objc is now valid on enums and enum cases so you can control the generated name
• Tuples (with up to 6 items) that have Equatable or Comparable items are themselves Equatable or Comparable. See here.
• The operator grammar was relaxed slightly. If an operator starts with a dot it can contain other dots, but otherwise it cannot contain any dots.

Documentation Comments

• - keyword: allows you to specify "other concepts".
• - recommended: lets you specify alternative declarations that users of an API should prefer
• - recommendedover: the inverse of - recommended:; this declaration is preferred over the listed alternatives.

Deprecations & Removals

If you've been following swift-evolution none of this is surprising but the following things have been deprecated and will now generate warnings.

• Curried function syntax
• ++ and --
• C-style for init; criteria; increment loops
• The global anyGenerator functions are now initializers on AnyGenerator (as they always should have been)

Fixes

• Closures inside generic types and methods can be used as C function pointers if the closure doesn't reference any generic arguments; if it does you'll now get a useful error instead of a crash.
• If a framework incorrectly uses unqualified #import or #include directives (using double quotes instead of angle brackets) the compiler no longer barfs with the dreaded "non-modular header inside framework" error.
• The static analyzer has several fixes related to Objective-C generics and nullability attributes
• 🎉 Code Completion 🎉
  • Matches on typing just the upper-case letters of method names. No more hunting around for the specific UITableViewDelegate function you're looking for!
  • Matches on substrings, so color brings up properties like backgroundColor and tintColor

Xcode, Debugging, and Misc

• LLDB now automatically imports the appropriate modules for the debugging context so there's no need to e @import UIKit; just to get the debugger to work properly. I still consider it shameful that this basic functionality was completely broken for so long.
• View Debugging (Debug, View Debugging, Capture View Hierarchy) has a ton of improvements; check out the release notes for more information.

Known Issues

• Nested types can cause compiler crashes if the nested type is referenced elsewhere in the same module; the recommendation is to use Whole Module Optimization or avoid nesting types for the moment.

fin

It's been a very busy time personally and I've been a bit absent from writing. Rest assured I have several posts in the pipeline that should see the light of day soon, including:

• A Swift Hypervisor
• UIKit Popover Adaptability: the Good, the Bad, and the Ugly (hint: it's all Ugly)
• Functors, Applicatives, and Monads in Plain English
• CoreImage, GL Shader Language, and Quartz Composer: Oh My
• ReactiveCocoa: The 15 Minute Guide
• Swift Associated Types, Round 2

If you have a preference on which you'd like to see next please leave a comment or send me a tweet.