Due to the fact that AnyClass is not Hashable, and that currently
NSKeyedArchiver/Unarchiver work with NSObject-derived, NSCoding
compliant classes, we are marking the decodeObjectOfClasses API refined
for Swift in our objc header and providing the desired overlay in our
overlay as shown below.
Arrays were also considered (for both API), but the underlying
implementation is entirely set-based, and using Arrays in Swift vs Sets
in objective C felt like too far a deviation.
Patch by Michael LeHew Jr.
Changes to the Dictionary test are caused by bumping the Fonudation API
epoch and taking in a fix in the types used in an NSDictionary
initializer.
rdar://21486551
Swift SVN r30297
includes a number of QoI things to help people write the correct code. I will commit
the testcase for it as the next patch.
The bulk of this patch is moving the stdlib, testsuite and validation testsuite to
the new syntax. I moved a few uses of "as" patterns back to as? expressions in the
stdlib as well.
Swift SVN r27959
Use -[NSDictionary copyWithZone:] instead.
CFDictionaryCreateCopy() is buggy in OSes that ship today: it copies the
dictionary unconditionally, even if it is immutable, resulting in O(n)
bridging.
Swift SVN r27732
requires pushing the types out. The only interesting one is this diff:
- var (e,f,g:(),h) = MRV()
+ var (e,f,g,h) : (Int, Float, (), Double) = MRV()
... where the type annotation is required to silence the warning about "void type
may be unexpected". This seems perfectly reasonable to me.
Swift SVN r26161
This changes 'if let' conditions to take general refutable patterns, instead of
taking a irrefutable pattern and implicitly matching against an optional.
Where before you might have written:
if let x = foo() {
you now need to write:
if let x? = foo() {
The upshot of this is that you can write anything in an 'if let' that you can
write in a 'case let' in a switch statement, which is pretty general.
To aid with migration, this special cases certain really common patterns like
the above (and any other irrefutable cases, like "if let (a,b) = foo()", and
tells you where to insert the ?. It also special cases type annotations like
"if let x : AnyObject = " since they are no longer allowed.
For transitional purposes, I have intentionally downgraded the most common
diagnostic into a warning instead of an error. This means that you'll get:
t.swift:26:10: warning: condition requires a refutable pattern match; did you mean to match an optional?
if let a = f() {
^
?
I think this is important to stage in, because this is a pretty significant
source breaking change and not everyone internally may want to deal with it
at the same time. I filed 20166013 to remember to upgrade this to an error.
In addition to being a nice user feature, this is a nice cleanup of the guts
of the compiler, since it eliminates the "isConditional()" bit from
PatternBindingDecl, along with the special case logic in the compiler to handle
it (which variously added and removed Optional around these things).
Swift SVN r26150
Generator observes a snapshot of the collection. Mutating the
collection should not have any effect on existing generators.
rdar://19726013
Swift SVN r25171
...into the validation suite. This is the wrong solution but at least
the bots will continue to run all the tests and we won't regress.
Swift SVN r24934
