Core Data synthesizes Key-Value-Coding-compliant accessors for @NSManaged
properties, but Swift won't allow them to be called without predeclaring
them.
In practice, '@NSManaged' on a method is the same as 'dynamic', except
you /can't/ provide a body and overriding it won't work. This is not the
long-term model we want (see rdar://problem/20829214), but it fixes a
short-term issue with an unfortunate workaround (go through
mutableOrderedSetValueForKey(_:) and similar methods).
rdar://problem/17583057
Swift SVN r30523
Otherwise, people subclassing NSView will accidentally call NSView.print
when they're trying to call Swift.print.
rdar://problem/18309853
Swift SVN r30334
This came out of today's language review meeting.
The intent is to match #available with the attribute
that describes availability.
This is a divergence from Objective-C.
Swift SVN r28484
The following declaration kinds can be marked with this attribute:
- method
- property
- property accessor
- subscript
- constructor
Use cases include resolving circularity for bridging methods in an @objc
class, and allowing overloading methods and constructors in an @objc class
by signature by marking some of them @nonobjc.
It is an error to override an @objc method with a @nonobjc method. The
converse, where we override a @nonobjc method with a @objc method, is
explicitly supported.
It is also an error to put a @nonobjc attribute on a method which is
inferred as @objc due to being part of an @objc protocol conformance.
Fixes <rdar://problem/16763754>.
Swift SVN r28126
@warn_unused_result can be attached to function declarations to
produce a warning if the function is called but its result is not
used. It has two optional parameters that can be placed in
parentheses:
message="some message": a message to include with the warning.
mutable_variant="somedecl": the name of the mutable variant of the
method that should be suggested when the subject method is called on
a mutable value.
The specific use we're implementing this for now is for the mutating
and in-place operations. For example:
@warn_unused_result(mutable_variant="sortInPlace") func sort() -> [Generator.Element] { ... }
mutating func sortInPlace() { ... }
Translate Clang's __attribute__((warn_unused_result)) into
@warn_unused_result.
Implements rdar://problem/18165189.
Swift SVN r28019
This is an internal-only affordance for the numerics team to be able to work on SIMD-compatible types. For now, it can only increase alignment of fixed-layout structs and enums; dynamic layout, classes, and other obvious extensions are left to another day when we can design a proper layout control design.
Swift SVN r27323
auto-completing @attributes. By delaying the handling of code completion token after the entire decl being parsed, we know
what are the targets of the attribute to finishe, thus, only suggesting those applicable attributes.
Swift SVN r25938
context-sensitive. The first step is to recommend parameter-applicable
attributes only when the code completion token is found inside a
param decl.
Swift SVN r25810
step to achieve this goal, this change allows the first parameter of
@availability to be completed with either one of the following four
platforms: *, iOS, iOSApplicationExtension, and OSX.
rdar://19541135
Swift SVN r25703
