Add syntax "[#Color(...)#]" for object literals, to be used by
Playgrounds for inline color wells etc. The arguments are forwarded to
the relevant constructor (although we will probably change this soon,
since (colorLiteralRed:... blue:... green:... alpha) is kind of
verbose). Add _ColorLiteralConvertible and _ImageLiteralConvertible
protocols, and link them to the new expressions in the type checker.
CSApply replaces the object literal expressions with a call to the
appropriate protocol witness.
Swift SVN r27479
ContiguousArrayBuffer is used as the buffer for Array when ObjC interop is disabled, so even though there's no behavior difference from "_isValidSubscript(_:hoistedIsNativeBuffer:)" for a ContiguousArrayBuffer, we want the interface to be interchangeable with the one for the bridgeable ArrayBuffer.
Swift SVN r27409
Now these functions are implemented using protocol extensions, which
are, in turn, implemented with an unsafe hack that casts @noescape away.
rdar://20544096
Swift SVN r27397
Now we initialize the array buffer from sequences using unsafe pointer
arithmetic, which avoids extra retain/release traffic. But since the
size of the sequence is not known in advance, we only initialize as much
as underestimateCount() promises, and fall back to the slow approach for
the tail. Nevertheless, for collections, where the size is known
precisely, this technique is suboptimal only by one branch.
rdar://20530390
Swift SVN r27380
This doesn't actually break the circular type-checking issues with
have with associated type inference, but it makes them less
painful. Fixes rdar://problem/20549165.
While here, and as a test, remove the _prext_underestimateCount
workound from the library. _CollectionDefaultsType now refines
_SequenceDefaultsType.
Swift SVN r27368
@objc protocols aren't supported with an ObjC runtime, but we still want values of AnyObject type to be word-sized. Handle this by turning the binary "needsWitnessTable" condition into a "dispatch strategy" enum, so we can recognize the condition "has no methods, so neither swift nor objc dispatch" as distinct from either swift or ObjC protocol representations. Assign this dispatch strategy when we lower AnyObject. Should be NFC for the ObjC-enabled build.
(It would also be beneficial for the ObjC-runtime-enabled version of Swift if AnyObject weren't an @objc protocol; that would mean we could give it a canonical protocol descriptor in the standard library, among other things. There are fairly deep assumptions in Sema that AnyObject is @objc, though, and it's not worth disturbing those assumptions right now.)
Reapplying with updates to the runtime unit tests.
Swift SVN r27341
@objc protocols aren't supported with an ObjC runtime, but we still want values of AnyObject type to be word-sized. Handle this by turning the binary "needsWitnessTable" condition into a "dispatch strategy" enum, so we can recognize the condition "has no methods, so neither swift nor objc dispatch" as distinct from either swift or ObjC protocol representations. Assign this dispatch strategy when we lower AnyObject. Should be NFC for the ObjC-enabled build.
(It would also be beneficial for the ObjC-runtime-enabled version of Swift if AnyObject weren't an @objc protocol; that would mean we could give it a canonical protocol descriptor in the standard library, among other things. There are fairly deep assumptions in Sema that AnyObject is @objc, though, and it's not worth disturbing those assumptions right now.)
Swift SVN r27338
This allows array types to get the best performance. The default
implementation for range replaceable collections appends elements one by
one, and the optimizer can't hoist uniqueness checks from the loop in
that case yet.
Swift SVN r27314
Array(other_collection) is using an optimized code path for copying
collections. An explicit for loop does not.
This commit should recover the performance regression in
rdar://20530390.
Swift SVN r27313
We may want to use optimized ErrorType representations that don't naturally "become" NSErrors, such as tagged-pointer representations of small error enums, or a tagged function pointer to a deferred error type constructor. Rename the runtime function to something a bit more descriptive of its real purpose, not its implementation.
Swift SVN r27209
